7Hertz Eternal
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7Hz Eternal
Disclaimer:
I received the 7Hz Eternal from Hifigo as a part of a review tour. The impressions shared in this write-up are based on my usage of the IEM and are based on my preference and perception. The 7Hz Eternal can be purchased from Hifigo:
https://hifigo.com/products/7hz-eternal
Introduction:
7Hz made a splash in the IEM scene with the Timeless, an affordable planar magnetic IEM which was simple in terms of aesthetics but had some bold sound for the price point, especially in terms of bass response. I was quite impressed by Timeless, hence, was naturally excited when I got a chance to try out the 7Hz Eternal.
Unlike the Timeless, the Eternal is quite bold in terms of aesthetics. The earpiece houses a humungous 14.5mm LCP (Liquid Crystal Polymer) diaphragm dynamic driver in a CNC Aluminium alloy cavity with sapphire-coated glass faceplates. The angled cuts which resemble the blades of a turbine placed underneath the reflective sapphire-coated tempered glass faceplate, give the Eternal a distinctive and elegant look. Kudos to 7Hz for coming up with such a bold and classy design. Although the earpieces are large, they’re surprisingly lightweight, weighing at 6g a piece (as per the specifications). In terms of fit, I personally didn’t have any issues, though it may be a concern for someone with smaller ears.
The unit I received, didn’t come with the retail packaging, so I can’t talk much about the unboxing experience or the accessories included. The brushed aluminum storage case is color matched with the IEM, and so is the MMCX cable. The IEM can be purchased with either a 3.5mm SE cable or a 4.4mm balanced cable or a 2.5mm balanced cable. The unit I received, came with a 3.5mm SE cable. The cable is an OCC + Silver Hybrid cable which seems to be quite durable and is free of microphonics.
Sound Impressions:
The Eternal is relatively warm sounding with a mid-focused tuning. In terms of bass response, the Eternal emphasizes the mid-bass region, with a tad bit of sub-bass. While this makes the bass sound somewhat natural, it lacks the oomph factor in the low end, which is especially evident in tracks like Adagio for Strings (Tiesto) or Beat 1 (Nucleya). However, what the Eternal lacks in terms of quantity, it more than makes up for it in terms of quality. The mid-bass emphasis of the IEM is very coherent with the mid-focussed tuning and the resulting tonality is very pleasing and inoffensive.
The mids on the Eternal are clean and vocals, both male and female, sound quite pleasant. Notes have a fair amount of weight, which is slightly accentuated due to the warm signature. Bollywood tracks, which are predominantly mid-focused, sound very good on the Eternal. It is a delight to listen to Mohammed Rafi sing Khoya Khoya Chand (Kala Bazar) or listen to the mesmerizing voice of Lata Mangeshkar in Aapki Nazron Ne Samjha (Anpadh). I couldn’t help but get lost in the emotion of these tracks while listening to them on the Eternal.
The highs on the Eternal are quite smooth. While the treble is perceivably rolled off, it doesn’t sound dull or claustrophobic. Again, the top end is inoffensive and has been rolled off, primarily for the sake of tonal coherence.
The Eternal has a fairly wide soundstage but mostly stays within the head, with minimal stage depth. The separation is good and imaging is acceptable. One thing I’d like to mention though is that the Eternal sounds significantly better when amped. While it doesn’t require a desktop amplifier, it sounded lackluster off the BTR3K. Given how good it sounded off the M11 Plus LTD and the Xduoo XD05-BAL, I’d say the Eternal requires a fair amount of power to be driven to its potential.
Conclusion:
The 7Hz Eternal is an elegant IEM with a fairly mid-centric, warm, and inoffensive tuning. The lightweight earpieces and smooth treble make it comfortable for longer listening sessions. I’d recommend this for those who prefer mid-centric or vocal-based tracks and/or Bollywood aficionados (like me
). Bass heads and Treble heads are likely to be disappointed.
Reference Tracks:
Disclaimer:
I received the 7Hz Eternal from Hifigo as a part of a review tour. The impressions shared in this write-up are based on my usage of the IEM and are based on my preference and perception. The 7Hz Eternal can be purchased from Hifigo:
https://hifigo.com/products/7hz-eternal
Introduction:
7Hz made a splash in the IEM scene with the Timeless, an affordable planar magnetic IEM which was simple in terms of aesthetics but had some bold sound for the price point, especially in terms of bass response. I was quite impressed by Timeless, hence, was naturally excited when I got a chance to try out the 7Hz Eternal.
Unlike the Timeless, the Eternal is quite bold in terms of aesthetics. The earpiece houses a humungous 14.5mm LCP (Liquid Crystal Polymer) diaphragm dynamic driver in a CNC Aluminium alloy cavity with sapphire-coated glass faceplates. The angled cuts which resemble the blades of a turbine placed underneath the reflective sapphire-coated tempered glass faceplate, give the Eternal a distinctive and elegant look. Kudos to 7Hz for coming up with such a bold and classy design. Although the earpieces are large, they’re surprisingly lightweight, weighing at 6g a piece (as per the specifications). In terms of fit, I personally didn’t have any issues, though it may be a concern for someone with smaller ears.
The unit I received, didn’t come with the retail packaging, so I can’t talk much about the unboxing experience or the accessories included. The brushed aluminum storage case is color matched with the IEM, and so is the MMCX cable. The IEM can be purchased with either a 3.5mm SE cable or a 4.4mm balanced cable or a 2.5mm balanced cable. The unit I received, came with a 3.5mm SE cable. The cable is an OCC + Silver Hybrid cable which seems to be quite durable and is free of microphonics.
Sound Impressions:
The Eternal is relatively warm sounding with a mid-focused tuning. In terms of bass response, the Eternal emphasizes the mid-bass region, with a tad bit of sub-bass. While this makes the bass sound somewhat natural, it lacks the oomph factor in the low end, which is especially evident in tracks like Adagio for Strings (Tiesto) or Beat 1 (Nucleya). However, what the Eternal lacks in terms of quantity, it more than makes up for it in terms of quality. The mid-bass emphasis of the IEM is very coherent with the mid-focussed tuning and the resulting tonality is very pleasing and inoffensive.
The mids on the Eternal are clean and vocals, both male and female, sound quite pleasant. Notes have a fair amount of weight, which is slightly accentuated due to the warm signature. Bollywood tracks, which are predominantly mid-focused, sound very good on the Eternal. It is a delight to listen to Mohammed Rafi sing Khoya Khoya Chand (Kala Bazar) or listen to the mesmerizing voice of Lata Mangeshkar in Aapki Nazron Ne Samjha (Anpadh). I couldn’t help but get lost in the emotion of these tracks while listening to them on the Eternal.
The highs on the Eternal are quite smooth. While the treble is perceivably rolled off, it doesn’t sound dull or claustrophobic. Again, the top end is inoffensive and has been rolled off, primarily for the sake of tonal coherence.
The Eternal has a fairly wide soundstage but mostly stays within the head, with minimal stage depth. The separation is good and imaging is acceptable. One thing I’d like to mention though is that the Eternal sounds significantly better when amped. While it doesn’t require a desktop amplifier, it sounded lackluster off the BTR3K. Given how good it sounded off the M11 Plus LTD and the Xduoo XD05-BAL, I’d say the Eternal requires a fair amount of power to be driven to its potential.
Conclusion:
The 7Hz Eternal is an elegant IEM with a fairly mid-centric, warm, and inoffensive tuning. The lightweight earpieces and smooth treble make it comfortable for longer listening sessions. I’d recommend this for those who prefer mid-centric or vocal-based tracks and/or Bollywood aficionados (like me
). Bass heads and Treble heads are likely to be disappointed.Reference Tracks:
Attachments
Disclaimer
This review unit was provided by Hifigo and views presented in the review are my unbiased take on the iem and no monetary compensation was provided for it.
You can purchase the iem here https://hifigo.com/products/7hz-eternal and https://www.amazon.com/dp/B09S3LMQ1F/7hz+eternal/
Introduction
7hz broke intothe iem scene with the timeless and Planar hype which still is a craze. Recently they even launched a $99 Planar Dioko in collaboration with (in)famous reviewer Crinacle. With all the hyped launches their ‘normal’ DD iem the Eternal which came along with the timeless was a bit overshadowed.
Single DD iems have been in the market for a long time and are a still an attraction to a few audiophiles who are ‘Timbre’heads to say. Personally I have tried few TOTL iems and found the often maligned BA timbre to be an issue for me. I own a couple of DD iems, the neutral benchmark Etymotic ER2 and a fun V shaped Fiio FD5. In this review I’ll try to compare these iems to see where the Eternal stands among the purist DD iems.
Build and design
I didn’t receive the retail packaging of the unit and only got a metal box, a cable with the iem. The box and cable match the chocolate brown colour of the iem and aesthetically looks good.
The famous sibling Timeless lends its coin like metal shell to the Eternal just that the face in the Eternal is a glass faceplate which shimmers with a Dynamic driver looking mould behind it.
If you had issues with the fit of the timeless you may face it with the eternal too as it’s literally the same shell design which I feel isn’t that ergonomic.
Sound and Comparison
Like I mentioned in the intro, I’ll be comparing the Etymotic ER2XR and Fiio FD5 against the Eternal in this review. Yes, there’s a price difference among the above but I feel the Sound performance are at a similar level between these iems.
The ER2 is well known for its neutrality, the XR variant adding a bit of sub bass boost to sound a bit fuller. The other end FD5 is a shamelessly fun sounding V shaped iem with a big midbass and a zingy upper mids/treble. I feel the eternal tries to balance the extremes with a slightly toned down but boosted bass and bit shelved down treble.
ER2 has a 2D and limited stage which sounds within the head (Also the deep insertion is not comfortable for many) while the FD5 has a considerably bigger stage and slightly better separation than the Eternal. Do note the Multi driver and planar iems in similar price range provide a better technical sound than the DD iems I’ve mentioned. But if you are a ‘Timbre’head you can neglect all the technical advantages for the realistic Dynamic driver sound these offer. These are no slouch to the multidriver iems in performance but may lag behind them in complex and busy passages where you may find the single driver limiting.
Conclusion
Some iems try to follow a neutralish sound profile while some tend to go full monty on V shaped consumerish sound. I feel the Eternal tries to balance these two extremes and to say sound ‘normal’. Is there a market for Dynamic driver iems? Yes, definitely the tech is still relevant, though all the hype about is planar and multidriver iems, the purists support and still view dynamic driver iems special.
This review unit was provided by Hifigo and views presented in the review are my unbiased take on the iem and no monetary compensation was provided for it.
You can purchase the iem here https://hifigo.com/products/7hz-eternal and https://www.amazon.com/dp/B09S3LMQ1F/7hz+eternal/
Introduction
7hz broke intothe iem scene with the timeless and Planar hype which still is a craze. Recently they even launched a $99 Planar Dioko in collaboration with (in)famous reviewer Crinacle. With all the hyped launches their ‘normal’ DD iem the Eternal which came along with the timeless was a bit overshadowed.
Single DD iems have been in the market for a long time and are a still an attraction to a few audiophiles who are ‘Timbre’heads to say. Personally I have tried few TOTL iems and found the often maligned BA timbre to be an issue for me. I own a couple of DD iems, the neutral benchmark Etymotic ER2 and a fun V shaped Fiio FD5. In this review I’ll try to compare these iems to see where the Eternal stands among the purist DD iems.
Build and design
I didn’t receive the retail packaging of the unit and only got a metal box, a cable with the iem. The box and cable match the chocolate brown colour of the iem and aesthetically looks good.
The famous sibling Timeless lends its coin like metal shell to the Eternal just that the face in the Eternal is a glass faceplate which shimmers with a Dynamic driver looking mould behind it.
If you had issues with the fit of the timeless you may face it with the eternal too as it’s literally the same shell design which I feel isn’t that ergonomic.
Sound and Comparison
Like I mentioned in the intro, I’ll be comparing the Etymotic ER2XR and Fiio FD5 against the Eternal in this review. Yes, there’s a price difference among the above but I feel the Sound performance are at a similar level between these iems.
The ER2 is well known for its neutrality, the XR variant adding a bit of sub bass boost to sound a bit fuller. The other end FD5 is a shamelessly fun sounding V shaped iem with a big midbass and a zingy upper mids/treble. I feel the eternal tries to balance the extremes with a slightly toned down but boosted bass and bit shelved down treble.
ER2 has a 2D and limited stage which sounds within the head (Also the deep insertion is not comfortable for many) while the FD5 has a considerably bigger stage and slightly better separation than the Eternal. Do note the Multi driver and planar iems in similar price range provide a better technical sound than the DD iems I’ve mentioned. But if you are a ‘Timbre’head you can neglect all the technical advantages for the realistic Dynamic driver sound these offer. These are no slouch to the multidriver iems in performance but may lag behind them in complex and busy passages where you may find the single driver limiting.
Conclusion
Some iems try to follow a neutralish sound profile while some tend to go full monty on V shaped consumerish sound. I feel the Eternal tries to balance these two extremes and to say sound ‘normal’. Is there a market for Dynamic driver iems? Yes, definitely the tech is still relevant, though all the hype about is planar and multidriver iems, the purists support and still view dynamic driver iems special.
7Hz Eternal : Enjoyment Ensured!
Summary:
Launched in May'2022, 7hz launched their latest Single DD IEM named Eternal. It comes with a 14.5MM Dynamic driver which is larger than most found in similar price range and promises extraordinary performance. Based on our impressions, we can confidently say that they have achieved much of what they had promised.
Disclaimer: These came to me from @shenzhenaudio for the purpose of comparative review & impressions, and I will ensure that I cover that below.
Introduction:
Let's quickly dive into what the 7hz eternal has to offer. The 14.5mm Dynamic driver should provide excellent dynamic range and bass performances while requiring a bit more power than usual for a dynamic driver IEM of similar price range.
The 7Hz Eternal is priced at $224.
Design & Build:
The shells look very different than most Single DD IEMs and look quite premium I must say. Despite the larger sized shell, owing to the design of the shells they fit quite nicely into the ears and are very comfortable to wear throughout longer listening sessions and I have tried them for 3+ hours of listening at a single stretch and seemed very comfortable the whole time.
It is described as the following on the website: The pair features a large 14.5mm LCP diaphragm dynamic driver enclosed in a specially designed acoustic cavity structure. Apart from its outstanding acoustic presentation, the pair has an elegant design with premium CNC machined Aluminum shell housings and sapphire glass face covers. Now enjoy your favorite music with great clarity and elegant designer looks of the latest 7Hz Eternal
Specifications:
The 7Hz Eternal comes at $224 price tag and the specifications are as below:
https://shenzhenaudio.com/products/...-detachable-mmcx-cable?variant=42387218235635
The Box & Accessories:
The Accessories:
The Euclid package now includes…
NOW LET'S TALK ABOUT THE SOUND....
Items Used for this Review:
DAC/AMP & Dongles: @Questyle M15 Dongle DAC/AMP, Cayin RU6
Portable Players / Sources : Cayin N8ii, Cayin N6ii with R2R motherboard, @Shanling M3X & M7, A&K SP1000M
Streaming Source: QOBUZ
Ear Tips:
I've tried tip-rolling with a variety of tips such as: @Final Audio E series red & black ones, JVC Spiral dots, Spiral Dots+, @SpinFit Eartip CP500, CP155. Out of all of these I have found the Azla Sednafit to be the best fit for my ears in terms of overall fit, isolation & comfort.
Tracks Used:
The tracks I have used can be found from the below playlist that I have used and generally use for most reviews...
Pairing Performance with different sources:
Dongle DAC/AMPs:
Eternal had the best pairing with @Questyle M15 and Cayin RU6 dongles.
Portable Players:
Obviously the Eternal had the best pairing with the Cayin N8ii as that comes with Class-A amplification and a new DAC which is super resolving and not to forget the Nutubes! But that's the $3500 range also and out of reach for most people!
But it performs well with each and every player including @Shanling M3X and M7.
Eternal Sound Impressions in Short:
The BASS:
The Bass of the Eternal is just great starting from the small micro details coming from the sub-bass region to the meatier mid-bass and I must say that the 14.5mm DD has it's benefits. In tracks like: "Fools Paradise (LP Version) – Donna Lewis" and "Chocolate Chip Trip - Tool" you can feel the bass attack and also hear all the tiny nuances' of the sub-bass.
The MIDS:
The midrange of the Eternal comes with ample texture, muscle and transients and seemed quite open. Vocals are very immersive and both male and female vocals come with ample amount of details and feel very real. Instruments felt very natural and real with high accuracy. In tracks like: "Anchor - Trace Bundy", "A dog named Freedom – Kinky Friedman" and "Ruby Tuesday – Franco Battiato" it’s really easy to get lost into the music as it comes with ample detailed transients, texture, excellent vocals and details.
The TREBLE:
The treble feels a bit laid back and inoffensive. Despite what other people said - I haven't come across that peak in the FR graph and the performance was quite enjoyable and Cymbals sound very life-like and real in tracks like “Chocolate Chip Trip – Tool”.
Treble in tracks like: "Paradise Circus – Massive Attack", "Mambo for Roy – Roy Hargrove” and "Saints and Angels – Sharon Shannon" feel smooth & creamy with the right amount of air and texture and just feels very buttery smooth.
The SOUNDSTAGE:
The Staging capabilities of the Eternal is the best I’ve come across in a Single DD IEM in similar price range. It comes with the right amount of width, height, depth and is well defined and just as much as the track requires. Tracks like: “The Secret Drawer – Bela Fleck and the Flecktones” or “She Don’t know – Melody Gardot” or “Bohemian Rhapsody (live aid) – Queen” sound amazing & enjoyable. This is amongst the strongest trait of this IEM.
Imaging & Timbre:
The Imaging on the Eternal is spot on with very accurate sense of direction and life-like natural Timbre performance. Tracks like: “Rotterdam (Or Anywhere) - The Beautiful South “or “Hello Again - Howard Carpendale & The Royal Philharmonic Orchestra” just shine through. Separation however is not the best I've heard but nothing much to complain really.
Comparisons:
No review is complete without comparisons. So here we are - with the 7hz Timeless, Eternal and the Raptgo Hook X.
Eternal vs Timeless vs Raptgo Hook X:
All of these 3 IEMs fall in similar price ranges and hence the comparison as requested by many people.
Bass: While the Eternal has more refined Bass performance with details from the sub-bass, the Timeless has slightly less details and thump but interestingly the hook X had much less details but more prominent mid-bass & thump and slam. I felt like the Eternal has the most refined performance and thus preferred.
Mids: The Hook X here had the most intimate performance with meatier and more textured midrange. The Timeless had enough room and better staging & separation in the midrange and the most balanced performance in this category. The Eternal despite slightly recessed mids was a good performer with open sound and texture and nice vocal and instrument representation.
Treble: This is where the Timeless just loses due to its sparkles and peaks, while the Eternal is quite nice & inoffensive. the Hook X also comes with enjoyable treble performance.
Soundstage, Imaging and Separation: This is where the Hook X lags behind owing to it's very narrow staging and lack of separation and imaging not good also. The Timeless has great staging just like the Eternal - however the Eternal has slightly better imaging while the Timeless has slightly better separation.
Conclusion:
The 7Hz Eternal ensure quite enjoyable experience and pairs well with most sources. It is quite comfortable to wear through long listening sessions and that's what makes it an ideal daily driver for people who just want to hear superb sound performances all day, every day. For people who love the Single DD sound like me - this would be an easy recommendation.
Summary:
Launched in May'2022, 7hz launched their latest Single DD IEM named Eternal. It comes with a 14.5MM Dynamic driver which is larger than most found in similar price range and promises extraordinary performance. Based on our impressions, we can confidently say that they have achieved much of what they had promised.
Disclaimer: These came to me from @shenzhenaudio for the purpose of comparative review & impressions, and I will ensure that I cover that below.
Introduction:
Let's quickly dive into what the 7hz eternal has to offer. The 14.5mm Dynamic driver should provide excellent dynamic range and bass performances while requiring a bit more power than usual for a dynamic driver IEM of similar price range.
The 7Hz Eternal is priced at $224.
Design & Build:
The shells look very different than most Single DD IEMs and look quite premium I must say. Despite the larger sized shell, owing to the design of the shells they fit quite nicely into the ears and are very comfortable to wear throughout longer listening sessions and I have tried them for 3+ hours of listening at a single stretch and seemed very comfortable the whole time.
It is described as the following on the website: The pair features a large 14.5mm LCP diaphragm dynamic driver enclosed in a specially designed acoustic cavity structure. Apart from its outstanding acoustic presentation, the pair has an elegant design with premium CNC machined Aluminum shell housings and sapphire glass face covers. Now enjoy your favorite music with great clarity and elegant designer looks of the latest 7Hz Eternal
Specifications:
The 7Hz Eternal comes at $224 price tag and the specifications are as below:
https://shenzhenaudio.com/products/...-detachable-mmcx-cable?variant=42387218235635
The Box & Accessories:
The Accessories:
The Euclid package now includes…
- Eternal
- 4.4mm balanced cable
- Aluminum case
- 5 Pairs of different ear tips
- Certificate of Authenticity
NOW LET'S TALK ABOUT THE SOUND....
Items Used for this Review:
DAC/AMP & Dongles: @Questyle M15 Dongle DAC/AMP, Cayin RU6
Portable Players / Sources : Cayin N8ii, Cayin N6ii with R2R motherboard, @Shanling M3X & M7, A&K SP1000M
Streaming Source: QOBUZ
Ear Tips:
I've tried tip-rolling with a variety of tips such as: @Final Audio E series red & black ones, JVC Spiral dots, Spiral Dots+, @SpinFit Eartip CP500, CP155. Out of all of these I have found the Azla Sednafit to be the best fit for my ears in terms of overall fit, isolation & comfort.
Tracks Used:
The tracks I have used can be found from the below playlist that I have used and generally use for most reviews...
Pairing Performance with different sources:
Dongle DAC/AMPs:
Eternal had the best pairing with @Questyle M15 and Cayin RU6 dongles.
Portable Players:
Obviously the Eternal had the best pairing with the Cayin N8ii as that comes with Class-A amplification and a new DAC which is super resolving and not to forget the Nutubes! But that's the $3500 range also and out of reach for most people!
But it performs well with each and every player including @Shanling M3X and M7.
Eternal Sound Impressions in Short:
The BASS:
The Bass of the Eternal is just great starting from the small micro details coming from the sub-bass region to the meatier mid-bass and I must say that the 14.5mm DD has it's benefits. In tracks like: "Fools Paradise (LP Version) – Donna Lewis" and "Chocolate Chip Trip - Tool" you can feel the bass attack and also hear all the tiny nuances' of the sub-bass.
The MIDS:
The midrange of the Eternal comes with ample texture, muscle and transients and seemed quite open. Vocals are very immersive and both male and female vocals come with ample amount of details and feel very real. Instruments felt very natural and real with high accuracy. In tracks like: "Anchor - Trace Bundy", "A dog named Freedom – Kinky Friedman" and "Ruby Tuesday – Franco Battiato" it’s really easy to get lost into the music as it comes with ample detailed transients, texture, excellent vocals and details.
The TREBLE:
The treble feels a bit laid back and inoffensive. Despite what other people said - I haven't come across that peak in the FR graph and the performance was quite enjoyable and Cymbals sound very life-like and real in tracks like “Chocolate Chip Trip – Tool”.
Treble in tracks like: "Paradise Circus – Massive Attack", "Mambo for Roy – Roy Hargrove” and "Saints and Angels – Sharon Shannon" feel smooth & creamy with the right amount of air and texture and just feels very buttery smooth.
The SOUNDSTAGE:
The Staging capabilities of the Eternal is the best I’ve come across in a Single DD IEM in similar price range. It comes with the right amount of width, height, depth and is well defined and just as much as the track requires. Tracks like: “The Secret Drawer – Bela Fleck and the Flecktones” or “She Don’t know – Melody Gardot” or “Bohemian Rhapsody (live aid) – Queen” sound amazing & enjoyable. This is amongst the strongest trait of this IEM.
Imaging & Timbre:
The Imaging on the Eternal is spot on with very accurate sense of direction and life-like natural Timbre performance. Tracks like: “Rotterdam (Or Anywhere) - The Beautiful South “or “Hello Again - Howard Carpendale & The Royal Philharmonic Orchestra” just shine through. Separation however is not the best I've heard but nothing much to complain really.
Comparisons:
No review is complete without comparisons. So here we are - with the 7hz Timeless, Eternal and the Raptgo Hook X.
Eternal vs Timeless vs Raptgo Hook X:
All of these 3 IEMs fall in similar price ranges and hence the comparison as requested by many people.
Bass: While the Eternal has more refined Bass performance with details from the sub-bass, the Timeless has slightly less details and thump but interestingly the hook X had much less details but more prominent mid-bass & thump and slam. I felt like the Eternal has the most refined performance and thus preferred.
Mids: The Hook X here had the most intimate performance with meatier and more textured midrange. The Timeless had enough room and better staging & separation in the midrange and the most balanced performance in this category. The Eternal despite slightly recessed mids was a good performer with open sound and texture and nice vocal and instrument representation.
Treble: This is where the Timeless just loses due to its sparkles and peaks, while the Eternal is quite nice & inoffensive. the Hook X also comes with enjoyable treble performance.
Soundstage, Imaging and Separation: This is where the Hook X lags behind owing to it's very narrow staging and lack of separation and imaging not good also. The Timeless has great staging just like the Eternal - however the Eternal has slightly better imaging while the Timeless has slightly better separation.
Conclusion:
The 7Hz Eternal ensure quite enjoyable experience and pairs well with most sources. It is quite comfortable to wear through long listening sessions and that's what makes it an ideal daily driver for people who just want to hear superb sound performances all day, every day. For people who love the Single DD sound like me - this would be an easy recommendation.
Attachments
shenzhenaudio
Thanks for review!
INTRODUCTION:
7Hz, a newly established brand based out of China, got a good reputation among the Audiophiles. They are well expertise in the production of high end IEMs since the Timeless IEM is a testimony for that. The Timeless, a planar driver IEM got a raving response among the consumers for its spectacular sound hence the price to performance ratio was solid with that product. To celebrate their anniversary they launched this single dynamic driver IEM named Eternal and in this review let’s check out how this fares against the current competition.
SPECIFICATIONS:
Resistance - 30 ohm
Sound pressure level - 109db/1 khz
Frequency response range - 10-20000hz
Driver - 14.5mm moving coil
14.5mm LCP Dynamic Driver-Laboratory level
CNC Aluminum Cavity Sapphire Optical Glass Faceplate
OCC+Single Crystal Silver Cable
DISCLAIMER:
This unit has been provided to me as a part of a review circle organized by team HiFiGo. The whole views are based on my sources and pairings with this product hence it might differ from person to person
If you are interested in purchasing this product please do via this unaffiliated link:
Amazon: Here!
HiFiGo: Here!
DESIGN AND FIT:
The design language is same as that of the Timeless but with some minor changes like the sapphire glass faceplate instead of the usual aluminium faceplate. The use of expensive sapphire glass does help in avoiding the scratches and the breakages. The circular shell does help in providing a nice isolated fit with good comfort.
They adopted the MMCX connection and as per my usage the connection felt secure and easy to remove. The provided stock cable is an OCC cable with copper and silver cables. The braiding is done sturdier and does have the outer sheath to provide uninterrupted connection. They are available in different terminations varying from 2.5, 3.5, and 4.4mm.
The provided case is well built enclosing a full metal construction. They are very satisfying to open and close with a nice felt lining inside. The case colour is very attractive where its bronze metallic colour matches the colour of the IEM making this look like an expensive jewellery!
SOUND:
The sound profile of the Eternal is more on the balanced side with more emphasis over the mid range section. The bass is present but it's very much subdued out while the treble is kept at a pleasing rate. The mid range is where the show starts by displaying its natural tone and lush timbre. Being a dynamic driver they could have done even better but hope in the next iteration that just changes and improves. Let’s dive into the full dissection of the audio.
LOW END:
The bass here in the Eternal is more mature than fun organised. The quality is where the eternal excels while misses out a lot on the quantity side. The balance between the quality and the quantity is missed out. The sub bass especially is not that great in terms of reach, rumble and presence. Even in the sub bass prominent tracks the sub bass notes appear to be subtle.
The mid bass is present but it too requires the quantity to make it sound fuller overall. The punch and the slam is missing out here and the attack is not that authoritative. The quality however is kept nicely where the control and the speed is admirable here. The bass is pretty fast here hence the separation in the low end is pretty good in the eternal. The clarity and the texture in the low end is kept nicely without any sort of distortion or excess bloom.
Overall the bass is focussed more on the quality side over the quantity side. The slam, attack and the weight is missed out while the separation, control and the speed are kept at a steady rate. The fullness factor is not present here due to that weightless bass response and being a single dynamic driver thought that the bass is going to be pretty fuller but the reality is kind of opposite even after the utilisation of the LCP diaphragm which is known for its impressive bass response.
MID RANGE:
The mid range is the perfect star show with excellent tonality and timbre representation which we usually see from a dynamic driver IEMs. First the vocals, where even though they are tuned to be presented in the forward position, they still sound pretty comfortable for the longer listening sessions without causing any harshness in the long run. The vocals are presented well articulated with natural sound reproduction without making them too smoother and muffled. The natural tonality is displayed out everywhere making this a very good vocals centric IEM.
The instrument has a nice warm timbre giving a nice engaging experience for the listener. The piano notes and the acoustic guitar strings have a nice note weight thus they sounded very much fuller. The detail retrieval in the mid section also appears pretty good hence the minute instruments are brought out really very well hence the separation aspect is a thumbs up in this eternal.
Both the upper and the lower midrange are tuned well with equal emphasis. The whole midrange section appeared pretty fuller yet clean with no noticeable distortion. The tonality is kept natural with a nice warm and lush timbre producing a nice thick overall sound. The detail retrieval in the mid range is pretty good and does bring out minute instrument notes even in the busy tracks.
TREBLE:
The treble is kept in a silent manner where the sibilance is kept under control. The extension in the top end is pretty good providing some great amount of airiness in the top end. The overall signature is neither too dark nor too bright; rather , they are safely tuned to provide an adequate amount of brilliance and shimmer in the top end.
The cymbal crashes sounds pretty good with nice attack and decay but still they appear to be slightly recessed and subdued. The splash in the instruments is kept quieter to provide a pleasing and non fatiguing listen in the long run.
The detail retrieval is kept at a good pace since the extension in the top end tuned great. The adequate amount of brightness gave the Eternal a great amount of separation in the top end thus the instruments never sounded congested and appeared pretty spaced out.
TECHNICALITIES:
STAGING: The staging in the Eternal is pretty good. It’s wide enough and above average for the price but it’s definitely not that big enough in terms of depth and height. The nice wide staging helped in bringing out a nice grandeur presentation. The layering is made well to where the varying depth in the notes is brought out really well. The vocals and the instruments are layered out very well with nice positioning. The depth in the stage is not that great since the bass response in the Eternal is pretty much subdued.
IMAGING: The imaging is pretty good here with nice precise placement of the instruments where the listener can easily spot out the instruments even when the busy tracks are replayed out. The channel sweep and the transient response felt pretty smoother. Since the staging is wide enough nothing felt constricted out thus the placement felt pretty much precise.
VERDICT:
Eternal, the latest offering from the House of 7Hz is a solid package for the consumers who love the mid range a lot. The Eternal is equipped with a 14.5mm LCP Diaphragm Dynamic Driver producing a nice balanced mid range focused sound. The Timeless is their previously launched product, being a planar product it produced a fantastic sound for the price and that’s my primary recommendation for the price. The Eternal is not their direct successor since the driver is a Dynamic Driver.
The sound out of the Eternal is pretty balanced with more emphasis over the midrange. The bass being on the weaker side with subtle quantity lacks the impact. The treble section is tuned out offensively with adequate brightness in the top end providing a nice pleasing overall listen. The mid range has that natural tonality with warm and lush timbre providing a nice full and thicker sound.
Technical aspects like the staging are pretty wide enough, depth being on the shallow side due to that impact less bass response. The imaging and the layering are spot on with precise placement of instruments and representing every varying depth notes accurately. The detail retrieval is good enough but definitely not the best out of the competition.
The design language is pretty unique and follows the same pattern as that of the Timeless having a disc shaped shell providing nice comfort and isolation. Instead of the usual aluminium faceplate the eternal equips the sapphire glass which is pretty much seen in the luxury wrist watches to avoid scratches and breaks. They do tend to show scattered effects when the light strikes on them.
Overall, the Eternal being a single dynamic driver produces a well matured mid centric sound with excellent design choice. That unique dynamic driver tonality and timbre is so addictive, providing a nice pleasing listen overall. The bass is the weaker aspect and could have been improved considering the LCP material that they have used. This is surely a MID”PHILIC” iem that every audiophile out there should have in their collection if you do love the mid range that much. If i have to pick one, then i would go with the Timeless as my option since that sounds better to my ears.
7Hz, a newly established brand based out of China, got a good reputation among the Audiophiles. They are well expertise in the production of high end IEMs since the Timeless IEM is a testimony for that. The Timeless, a planar driver IEM got a raving response among the consumers for its spectacular sound hence the price to performance ratio was solid with that product. To celebrate their anniversary they launched this single dynamic driver IEM named Eternal and in this review let’s check out how this fares against the current competition.
SPECIFICATIONS:
Resistance - 30 ohm
Sound pressure level - 109db/1 khz
Frequency response range - 10-20000hz
Driver - 14.5mm moving coil
14.5mm LCP Dynamic Driver-Laboratory level
CNC Aluminum Cavity Sapphire Optical Glass Faceplate
OCC+Single Crystal Silver Cable
DISCLAIMER:
This unit has been provided to me as a part of a review circle organized by team HiFiGo. The whole views are based on my sources and pairings with this product hence it might differ from person to person
If you are interested in purchasing this product please do via this unaffiliated link:
Amazon: Here!
HiFiGo: Here!
DESIGN AND FIT:
The design language is same as that of the Timeless but with some minor changes like the sapphire glass faceplate instead of the usual aluminium faceplate. The use of expensive sapphire glass does help in avoiding the scratches and the breakages. The circular shell does help in providing a nice isolated fit with good comfort.
They adopted the MMCX connection and as per my usage the connection felt secure and easy to remove. The provided stock cable is an OCC cable with copper and silver cables. The braiding is done sturdier and does have the outer sheath to provide uninterrupted connection. They are available in different terminations varying from 2.5, 3.5, and 4.4mm.
The provided case is well built enclosing a full metal construction. They are very satisfying to open and close with a nice felt lining inside. The case colour is very attractive where its bronze metallic colour matches the colour of the IEM making this look like an expensive jewellery!
SOUND:
The sound profile of the Eternal is more on the balanced side with more emphasis over the mid range section. The bass is present but it's very much subdued out while the treble is kept at a pleasing rate. The mid range is where the show starts by displaying its natural tone and lush timbre. Being a dynamic driver they could have done even better but hope in the next iteration that just changes and improves. Let’s dive into the full dissection of the audio.
LOW END:
The bass here in the Eternal is more mature than fun organised. The quality is where the eternal excels while misses out a lot on the quantity side. The balance between the quality and the quantity is missed out. The sub bass especially is not that great in terms of reach, rumble and presence. Even in the sub bass prominent tracks the sub bass notes appear to be subtle.
The mid bass is present but it too requires the quantity to make it sound fuller overall. The punch and the slam is missing out here and the attack is not that authoritative. The quality however is kept nicely where the control and the speed is admirable here. The bass is pretty fast here hence the separation in the low end is pretty good in the eternal. The clarity and the texture in the low end is kept nicely without any sort of distortion or excess bloom.
Overall the bass is focussed more on the quality side over the quantity side. The slam, attack and the weight is missed out while the separation, control and the speed are kept at a steady rate. The fullness factor is not present here due to that weightless bass response and being a single dynamic driver thought that the bass is going to be pretty fuller but the reality is kind of opposite even after the utilisation of the LCP diaphragm which is known for its impressive bass response.
MID RANGE:
The mid range is the perfect star show with excellent tonality and timbre representation which we usually see from a dynamic driver IEMs. First the vocals, where even though they are tuned to be presented in the forward position, they still sound pretty comfortable for the longer listening sessions without causing any harshness in the long run. The vocals are presented well articulated with natural sound reproduction without making them too smoother and muffled. The natural tonality is displayed out everywhere making this a very good vocals centric IEM.
The instrument has a nice warm timbre giving a nice engaging experience for the listener. The piano notes and the acoustic guitar strings have a nice note weight thus they sounded very much fuller. The detail retrieval in the mid section also appears pretty good hence the minute instruments are brought out really very well hence the separation aspect is a thumbs up in this eternal.
Both the upper and the lower midrange are tuned well with equal emphasis. The whole midrange section appeared pretty fuller yet clean with no noticeable distortion. The tonality is kept natural with a nice warm and lush timbre producing a nice thick overall sound. The detail retrieval in the mid range is pretty good and does bring out minute instrument notes even in the busy tracks.
TREBLE:
The treble is kept in a silent manner where the sibilance is kept under control. The extension in the top end is pretty good providing some great amount of airiness in the top end. The overall signature is neither too dark nor too bright; rather , they are safely tuned to provide an adequate amount of brilliance and shimmer in the top end.
The cymbal crashes sounds pretty good with nice attack and decay but still they appear to be slightly recessed and subdued. The splash in the instruments is kept quieter to provide a pleasing and non fatiguing listen in the long run.
The detail retrieval is kept at a good pace since the extension in the top end tuned great. The adequate amount of brightness gave the Eternal a great amount of separation in the top end thus the instruments never sounded congested and appeared pretty spaced out.
TECHNICALITIES:
STAGING: The staging in the Eternal is pretty good. It’s wide enough and above average for the price but it’s definitely not that big enough in terms of depth and height. The nice wide staging helped in bringing out a nice grandeur presentation. The layering is made well to where the varying depth in the notes is brought out really well. The vocals and the instruments are layered out very well with nice positioning. The depth in the stage is not that great since the bass response in the Eternal is pretty much subdued.
IMAGING: The imaging is pretty good here with nice precise placement of the instruments where the listener can easily spot out the instruments even when the busy tracks are replayed out. The channel sweep and the transient response felt pretty smoother. Since the staging is wide enough nothing felt constricted out thus the placement felt pretty much precise.
VERDICT:
Eternal, the latest offering from the House of 7Hz is a solid package for the consumers who love the mid range a lot. The Eternal is equipped with a 14.5mm LCP Diaphragm Dynamic Driver producing a nice balanced mid range focused sound. The Timeless is their previously launched product, being a planar product it produced a fantastic sound for the price and that’s my primary recommendation for the price. The Eternal is not their direct successor since the driver is a Dynamic Driver.
The sound out of the Eternal is pretty balanced with more emphasis over the midrange. The bass being on the weaker side with subtle quantity lacks the impact. The treble section is tuned out offensively with adequate brightness in the top end providing a nice pleasing overall listen. The mid range has that natural tonality with warm and lush timbre providing a nice full and thicker sound.
Technical aspects like the staging are pretty wide enough, depth being on the shallow side due to that impact less bass response. The imaging and the layering are spot on with precise placement of instruments and representing every varying depth notes accurately. The detail retrieval is good enough but definitely not the best out of the competition.
The design language is pretty unique and follows the same pattern as that of the Timeless having a disc shaped shell providing nice comfort and isolation. Instead of the usual aluminium faceplate the eternal equips the sapphire glass which is pretty much seen in the luxury wrist watches to avoid scratches and breaks. They do tend to show scattered effects when the light strikes on them.
Overall, the Eternal being a single dynamic driver produces a well matured mid centric sound with excellent design choice. That unique dynamic driver tonality and timbre is so addictive, providing a nice pleasing listen overall. The bass is the weaker aspect and could have been improved considering the LCP material that they have used. This is surely a MID”PHILIC” iem that every audiophile out there should have in their collection if you do love the mid range that much. If i have to pick one, then i would go with the Timeless as my option since that sounds better to my ears.
I got to know about the 7Hz as a brand when they released the Timeless last year. I actually auditioned the pair too and liked it too. It was a fairly good-sounding set with a powerful bass response. For the price it was being offered, the Timeless was pretty good. Next came the dynamic driver “Eternal” from them. Amazing design on the shell, housing a large 14.5mm dynamic driver, the 7Hz Eternal intrigued me even more than the Timeless. Luckily, I got a chance to audition the same courtesy of a review tour being organized in my country. Let’s begin with the review without wasting any more time.
Short disclaimer:-
Eternal was sent to me as a part of a review tour organized by Hifigo. This doesn’t affect my judgment on the pair that is purely based on my usage with the pair over the past week(about 8 days to be exact). If interested you can purchase the Eternal from Hifigo store from the link below or by clicking here.
https://hifigo.com/products/7hz-eternal
https://www.amazon.com/dp/B09S3LMQ1F/7hz+eternal/
I received only the pair with a few pairs of ear tips, a stock cable(3.5mm termination), and the metallic carry case. Let’s begin with the design part.
Design & Build quality:-
Eternal has got an impressive build. The faceplate has got sapphire glass cover and the inside looks like a jet engines propeller. Loved the design and look of the pair. 7Hz has kept the shell shape the same as the Timeless, a big circular faceplate with a shaped inner side. The pair fit perfectly, there are no issues in getting proper isolation or comfortable fit for me. Although at a glance the big faceplate might look uncomfortable, it fits nicely. The shells are metallic, they have a solid build. I remember I wore these to the gym once and a few people actually inquired about the pair. They were most intrigued by the beautiful yet strange design of the pair.
Accessories:-
Man, I loved the brush-polished, neatly textured metallic carry case of the Timeless. With the eternal, it’s an identical one but with a brown finish(matching the pair). The included cable also looks of good quality. It has a silicone-type outer cover in brown color matching the pair.
Power Requirements:-
7Hz Eternal is a fairly easy-to-drive set of in-ear monitors. We don’t have to give the set a lot of juice or amplification. It works pretty well even with a smartphone. Although like always, I recommend using DAC/AMP and portable audio players for the best experience. Personally, for the purpose of this review, I used the set with Moondrop Moonriver 2 and the Astell&Kern SE100. Also tested the pair with my Redmi Note 10 Pro for checking its performance with a smartphone. It worked pretty well off with all the three sources, I just find the pair to show better dynamics with the Moonriver 2 and SE100.
Sound Performance:-
7Hz Eternal is a fun-sounding IEM. It has a warm tonality with a powerful lower-end response. The pair sounds pretty good for my regional Bollywood music, some EDM, and Hip-Hop tracks. Not something I would enjoy acoustic tracks with, but something I would enjoy at the gym with its punchy lower-end response. It has a clean lower end, it has a nicely controlled bass response, and the midrange sounds clean and precise. The treble region is smooth and inoffensive. I would say the pair goes soft in the treble region and it would have been better with a little more energy in the treble region. Especially when I compare it against the Timeless, the treble region felt off and soft to me. Let’s discuss different frequencies in detail a bit.
Lower-End:-
Eternal presents a powerful bass response. It shows good mid-bass slams with a gentle sub-bass rumble. I would say the mid-bass feels more prominent in the lower end. It doesn’t go boomy or too into the face but maintains clean and precise thumps in the mid-bass region. It’s good for having fun and casual listening sessions.
Midrange:-
With a powerful lower-end, the midrange is clean and precise. It shows a little warm character to its tone, vocals sound pleasing and charming. The warm tone also adds a little weight to the instruments and vocals. The overall presentation can be considered a little meaty and lush.
Treble:-
Treble has a smooth tuning, it rolls off early in the upper treble region too. I personally feel the treble could be tuned a little better with the Eternal. I would have appreciated a little more energy, a little more character to the treble region. On the other hand, it’s a safe tuning, it sounds inoffensive, and one can listen to the set for longer hours without getting tired.
Soundstage & Separation:-
Eternal has good width to the soundstage. Depth is pretty average for its price point. Staging wise it is identical to the elder brother Timeless I would say. Instrument separation is good, and imaging and positioning are average for the price. Timeless had better imaging in my opinion.
Timeless Vs Eternal: The Battle Of The Siblings:-
I used to own the timeless previously. I have many memories of that set, so I will be comparing it against the younger brother Eternal. (Please note that these impressions are based on my previous experience with the Timeless that I owned a few months back, the image is also from my archives).
>Timeless had more sub-bass, Eternal takes emphasis a little more on the mid-bass region.
>Eternal has got better midrange with lush, rich vocals and instruments.
>Separation and imaging were better on the Timeless.
>Stage wise both are identical.
>Looks wise Eternal is better.
Final Words For The Eternal:-
7Hz has built a pretty nice-looking earphone with the Eternal that also happen to have a smooth and inoffensive sound. I personally liked the bass response and the lush midrange of the set. Yeah, It has flaws of its own, especially in the treble region, but that is tuned in a safe manner so it doesn’t offend me at all. I would regard the pair as a musical set rather than an analytical one.
Well, that’s about the Eternal from my side, I hope you guys like my review, for any questions, feel free to ask me in the comments section below.
Short disclaimer:-
Eternal was sent to me as a part of a review tour organized by Hifigo. This doesn’t affect my judgment on the pair that is purely based on my usage with the pair over the past week(about 8 days to be exact). If interested you can purchase the Eternal from Hifigo store from the link below or by clicking here.
https://hifigo.com/products/7hz-eternal
https://www.amazon.com/dp/B09S3LMQ1F/7hz+eternal/
I received only the pair with a few pairs of ear tips, a stock cable(3.5mm termination), and the metallic carry case. Let’s begin with the design part.
Design & Build quality:-
Eternal has got an impressive build. The faceplate has got sapphire glass cover and the inside looks like a jet engines propeller. Loved the design and look of the pair. 7Hz has kept the shell shape the same as the Timeless, a big circular faceplate with a shaped inner side. The pair fit perfectly, there are no issues in getting proper isolation or comfortable fit for me. Although at a glance the big faceplate might look uncomfortable, it fits nicely. The shells are metallic, they have a solid build. I remember I wore these to the gym once and a few people actually inquired about the pair. They were most intrigued by the beautiful yet strange design of the pair.
Accessories:-
Man, I loved the brush-polished, neatly textured metallic carry case of the Timeless. With the eternal, it’s an identical one but with a brown finish(matching the pair). The included cable also looks of good quality. It has a silicone-type outer cover in brown color matching the pair.
Power Requirements:-
7Hz Eternal is a fairly easy-to-drive set of in-ear monitors. We don’t have to give the set a lot of juice or amplification. It works pretty well even with a smartphone. Although like always, I recommend using DAC/AMP and portable audio players for the best experience. Personally, for the purpose of this review, I used the set with Moondrop Moonriver 2 and the Astell&Kern SE100. Also tested the pair with my Redmi Note 10 Pro for checking its performance with a smartphone. It worked pretty well off with all the three sources, I just find the pair to show better dynamics with the Moonriver 2 and SE100.
Sound Performance:-
7Hz Eternal is a fun-sounding IEM. It has a warm tonality with a powerful lower-end response. The pair sounds pretty good for my regional Bollywood music, some EDM, and Hip-Hop tracks. Not something I would enjoy acoustic tracks with, but something I would enjoy at the gym with its punchy lower-end response. It has a clean lower end, it has a nicely controlled bass response, and the midrange sounds clean and precise. The treble region is smooth and inoffensive. I would say the pair goes soft in the treble region and it would have been better with a little more energy in the treble region. Especially when I compare it against the Timeless, the treble region felt off and soft to me. Let’s discuss different frequencies in detail a bit.
Lower-End:-
Eternal presents a powerful bass response. It shows good mid-bass slams with a gentle sub-bass rumble. I would say the mid-bass feels more prominent in the lower end. It doesn’t go boomy or too into the face but maintains clean and precise thumps in the mid-bass region. It’s good for having fun and casual listening sessions.
Midrange:-
With a powerful lower-end, the midrange is clean and precise. It shows a little warm character to its tone, vocals sound pleasing and charming. The warm tone also adds a little weight to the instruments and vocals. The overall presentation can be considered a little meaty and lush.
Treble:-
Treble has a smooth tuning, it rolls off early in the upper treble region too. I personally feel the treble could be tuned a little better with the Eternal. I would have appreciated a little more energy, a little more character to the treble region. On the other hand, it’s a safe tuning, it sounds inoffensive, and one can listen to the set for longer hours without getting tired.
Soundstage & Separation:-
Eternal has good width to the soundstage. Depth is pretty average for its price point. Staging wise it is identical to the elder brother Timeless I would say. Instrument separation is good, and imaging and positioning are average for the price. Timeless had better imaging in my opinion.
Timeless Vs Eternal: The Battle Of The Siblings:-
I used to own the timeless previously. I have many memories of that set, so I will be comparing it against the younger brother Eternal. (Please note that these impressions are based on my previous experience with the Timeless that I owned a few months back, the image is also from my archives).
>Timeless had more sub-bass, Eternal takes emphasis a little more on the mid-bass region.
>Eternal has got better midrange with lush, rich vocals and instruments.
>Separation and imaging were better on the Timeless.
>Stage wise both are identical.
>Looks wise Eternal is better.
Final Words For The Eternal:-
7Hz has built a pretty nice-looking earphone with the Eternal that also happen to have a smooth and inoffensive sound. I personally liked the bass response and the lush midrange of the set. Yeah, It has flaws of its own, especially in the treble region, but that is tuned in a safe manner so it doesn’t offend me at all. I would regard the pair as a musical set rather than an analytical one.
Well, that’s about the Eternal from my side, I hope you guys like my review, for any questions, feel free to ask me in the comments section below.
Disclaimer : The unit was sent by Hifigo as a part of a review tour but all thoughts and opinions are my own. You can purchase the Eternal here and here
Build and Fit
Effort and attention to detail has gone into the build of the Eternal overall. While the earpieces are solid metal the real stand out feature is the all metal chunky carry case. I mean, it is HEAVY! to the point of it being a bit cumbersome in your pockets I would say. But it's reassuring to know that it would probably stop a bullet or something.
The back plate has a nice design to it, for what appears to be glass? There is a design behind it that resembles a fan. Of course this is all cosmetic to my knowledge, although it could have an effect on the resulting sound. The Eternal is quite comfortable to my ears and it fits slightly loose even with the large tips, not the usual tight sealing earphones that we see.
Amp Needs
At 30ohm, 109dB/mW there is no need for an external amplifier. It runs fine off just about anything.
Sound Quality
On first listen the first thing that becomes quite apparent is that the Eternal is substantially warm. It is more evident on busier tracks where the top end seems to be closed in and lacking airiness. If one is listening to simpler music or vocal-based music, it sounds quite pleasant with an agreeable timbre. The overall presentation is smooth and on the soft side, however it does seem to have a certain thinness in the upper midrange area which is a pretty common issue among earphones. The midrange and especially the vocal quality is nice. It is more forward and takes the center stage, whereas the other smaller details and nuances are pushed back. Instruments are separated nicely but it could have been better if not for the closed in nature of the top end. The bass however is quite natural and isn't boosted or lacking in any way. The bass and midrange coherence really draws attention.
Conclusion
The Eternal is more for the people who like a warm and rich sound that is fatigue free. Those that predominantly listen to vocal based music will like its presentation. I do wish it had a bit more air and top end extension which would have resulted in a more open sound.
Build and Fit
Effort and attention to detail has gone into the build of the Eternal overall. While the earpieces are solid metal the real stand out feature is the all metal chunky carry case. I mean, it is HEAVY! to the point of it being a bit cumbersome in your pockets I would say. But it's reassuring to know that it would probably stop a bullet or something.
The back plate has a nice design to it, for what appears to be glass? There is a design behind it that resembles a fan. Of course this is all cosmetic to my knowledge, although it could have an effect on the resulting sound. The Eternal is quite comfortable to my ears and it fits slightly loose even with the large tips, not the usual tight sealing earphones that we see.
Amp Needs
At 30ohm, 109dB/mW there is no need for an external amplifier. It runs fine off just about anything.
Sound Quality
On first listen the first thing that becomes quite apparent is that the Eternal is substantially warm. It is more evident on busier tracks where the top end seems to be closed in and lacking airiness. If one is listening to simpler music or vocal-based music, it sounds quite pleasant with an agreeable timbre. The overall presentation is smooth and on the soft side, however it does seem to have a certain thinness in the upper midrange area which is a pretty common issue among earphones. The midrange and especially the vocal quality is nice. It is more forward and takes the center stage, whereas the other smaller details and nuances are pushed back. Instruments are separated nicely but it could have been better if not for the closed in nature of the top end. The bass however is quite natural and isn't boosted or lacking in any way. The bass and midrange coherence really draws attention.
Conclusion
The Eternal is more for the people who like a warm and rich sound that is fatigue free. Those that predominantly listen to vocal based music will like its presentation. I do wish it had a bit more air and top end extension which would have resulted in a more open sound.
Review Of The 7Hz Eternal
Introduction
7hz Eternal is a dynamic driver IEM released by a Chinese company 7hz. 7hz is the same company who also released the infamous 7hz Timeless, a planar magnetic IEM. Like before as I have mentioned, Other than the above mentioned IEMs, In 7hz's arsenal of IEMs, i77, i88, i99 with their mini model were also released by the company.
Disclaimer
*Thanks to HiFiGo team as this unit tour has been arranged by HiFiGo, lovely people. And as mentioned in all of my reviews, same goes with this one too and that is, each and every thoughts below mentioned are my personal own thoughts and they are not fiddled with any outside influences. The following link is where you can go and own one for yourself :-
https://hifigo.com/products/7hz-eternal
https://www.amazon.com/dp/B09S3LMQ1F/7hz+eternal/
*I will be referring these IEMs to as 'Eternal' for the rest of the review.
*And at last I will only be reviewing the Eternal on the basis of their performance, I do not care what these are made of or packaged with when newly purchased unless it affects the sound in any sense what so ever.
Specification
Eternal is a dynamic driver IEM which houses large 14.2mm Liquid Crystal Polymer diaphragms with powerful N52 magnets. These have an impendence of 30 ohms and sensitivity of 109db/1khz. The frequency response is from 10Hz to 20kHz.
Sound
Okay, so the 7hz Eternal is a very balanced tuned IEM. I don't know why I feel like there is no life to he low region but it exists, not in a bad way but not in a good way either. The mid range are very forward like any other balanced set the upper mids lives in front. The treble sparkles the way with lively presence. I find the Eternal more energetic, more cleaner but low performing in the technical aspects.
Treble
The treble response on this IEM is lively and energetic. The Eternals have a limited space to breath in the upper treble but still sounds crisps and clean. Although the extension is not that great. When comparing with it's sister Timeless, I find that the Timeless are much smoother and fuller sound but that up to the taste. And yes obviously with the advantage of being a planar IEM, The Timeless resovles pretty much great in this region. The vocals in this region sounds more like digitally filtered. This doesn't mean the vocals sounds bad or unbearable. They are quite nice but to my taste, they aren't felt naturally produced.
Mid Range
Coming to it's performance in Mid range region. They are very forward more expressing and more sibilant I suppose. if one would want to buy anIEM with mid centric preference, well this set is very revealing in the mid region. Not only the vocals but the guitars, the synths, everything sounds very revealing and in your face. Sometimes I find the upper mid range sibilant and especially in between 1k-6k region.
The upper mid range resolves vocals beautifully but it is too much. The clean presentation here doesn't help with the intimate sound and sibilance produced. Although the guitar being lean, sounds very exciting and revealing. The upper mid range is prominent in mix mix. Any one listening to this IEM will definitely realize it is upper mid range focused and it does it's best to deliver the best vocals but not necessarily the finest or smoothest.
The lower mid range are overshadowed by upper mid range's performance. Due to this the notes are lean in the upper region and tight. Also the lower region is not so forward sounding and the upper region sound a bit harsh and bright to my taste.
Bass
The bass is really well done. The extension in sub bass region sounds deep and clean but not rumbling. Same goes for the mid bass have a presence but doesn’t feel thick or slamming. I feel that it is very well controlled to an extend that the bass produces tight and accurate punches, if there are any. Only my complain is with the senseless and lifeless representation of bass and other it messes with the mix when the upper mid range become prominent and take stage.
To be honest I find the bass done here is better than the timeless but I would also like to mention that even if the bass on timeless is bloated sounding, it feels organic thick and real to me. Well too much real to be exact.
Technical Performance
The technical aspect of the Eternal is not so great. They are so and ao, mediocre to say the most. And presents itself smooth and soft in presentation. The soundstage is mostly towards left and right. I find the separation of vocals to be precise as when mid range start living in the mix other plays in the background.
Soundstage, Sound Imaging & Separation
The soundstage is narrow very close and intimate sounding which also messes with the mix and sounds congested at some times but as the upper mid range are very prominent and overshadows all over all frequency, masks the congestion and sounds okay. The imaging is really not so good. Well my previous experiences with LCP drivers have already taught me of the 3d holographic imaging being mostly towards left and right. The stereo reproduction is the worst in the Eternal. I find the best done on the Moondrop Aria. Also the separation is vague, very close and overlapping or over layering. The each and every distinct sound produce is overlapping each other and doesn't express itself out and the vocals being manipulative, when it starts to become chaos, every other element goes into the background. Doing so doesn't let the quality to drop down or the details to sound bad.
Speed & Resolution
the attacks and decays of notes are average as expected from a dynamic driver. But quite escapes away in the dynamic range. Maybe the reason is the mid range too forward in the mix. The vocals sounds same have no resolution or a distinct sense or feel to every notes. The resolution is greatly appreciated here as it is not being richer or fuller but it is cleaner.
Conclusion
To be honest, The 7hz Eternal is a magestic vocal empress in its price range or below. And with the bass being controlled really great with the sense of depth. It is clearly not for a basshead but for a pure mid centric audiophile who loves vocals and the ability to listen everything in the mix.
Well it is worth a try if you can afford. Although I quite haven’t said this and doesn’t mean I am judging it on this basis, But the iem shell and colour is so beautiful. They look absolute gorgeous.
I’d recommend this to those who wants to listen a balanced sound with majestic vocals and excellent sounding instruments around it.
Sources And Tracks Used
Sources
Apple iPhone XS MaxLG G8X
iPad (4th generation)
Apple Dongle Dac
Shanling UA1 Pro
iFi HIPDAC
Venture Electronics Megatron
Apple Lossless
UAPP
Localy stored Flac and Wav Files
Tracks
Curtis Mayfield - PushermanEarth, Wind & Fire - September
Earth, Wind & Fire - Let's Groove
Boston - More Than A Feeling
Fleetwood Mac - Everywhere(Remastered)
Toto - Africa
The Police - Every Breath You Take
George Benson - Affirmation
Daft Punk - Doin' It Right
Daft Punk - Derezzed
Daft Punk - Tron Legacy (End Titles)
GOJIRA - Amazonia
The Mars Volta - Inertiatic ESP
Fergie - Glamorous
50 Cent - In Da Club
Jay Z - Holy Grail
Erbes - Lies
Nitti Gritti - The Loud
Juelz - Inferno
Intro…
I am currently posting a series of "Mini-Reviews" and todays mini review is of another set of 7 Hertz IEMs, the 7Hz Eternal.
If you don’t know what these mini reviews are, I suggest you check out the Timeless mini review (here), where I explain why I am doing these mini reviews. Again, I apologize for the lack of photos and the poor quality of the single photo I have included.
I would like to shout out to Android and Audio Discourse once more for sending me these IEMs to try out, it is much appreciated.
Presentation…
All I can say here is the same as I said with the Timeless, I can’t speak about the full presentation as I am not sure exactly what was included.
The box and the contents I have received are the same as with the Timeless, the only thing that has changed is the colour of the packaging (and the colour of the contents).
Build and aesthetics…
Again, these IEMs are almost identical to the Timeless except for the colour and one small aesthetical change. The faceplate of these IEMs is transparent and shows what looks like a driver through the glass (perspex?). However, this is not the actual driver, so it is really only a gimmick and I can’t say that I am overly fond of it.
The colour is a bronze colour instead of the black on the timeless, which I do quite like but I wouldn’t call them spectacular, in fact, I prefer the basic black of the timeless.
Sound…
I actually thought that these IEMs were another set of planar magnetics, an update to the Timeless. While I was listening to these, I was comparing them in my mind to the Timeless and I must say that I am not a fan. However, they are actually a set of dynamic driver IEMs but I am still not a fan.
The subbass is almost identical to the Timeless on paper, however, it sounds like it is less present, due to another part of the tuning that I will get to in just a second. This makes it seem like the subbass is quite rolled off and I found myself wanting far more than was given.
The midbass is the same story, it is almost a clone of the Timeless, yet the Eternal seems to have less to the ear. Again, I found myself wanting more. Yes, the bass boost on the Gryphon can remedy this but in a fair comparison, the Timeless wins and the S12 wins by an even larger margin.
The biggest problem with these IEMs, in my opinion of course, is the huge peak they have at 5kHz. I have said in the past that I seem to be quite sensitive to 5kHz peaks and the Eternal to me just sound harsh and even quite painful on occasions. I must say that I found this part of the frequency to be irritating at best and it really stopped me from enjoying these IEMs.
The details and soundstage I feel are just as good as on the Timeless, however, as I found the overall sound to be irritating, I wasn’t really paying much attention to the detail.
Conclusion…
So far I have tried three sets of IEMs in a row and I have to say that these have been the least enjoyable by a large margin. I found that I had to really make an effort to keep listening to them to make these brief impressions and in the end, I just gave up. I spent around a day with each of the other two sets yet the Eternal only managed to stay in my ears for about a couple of hours and that was enough for me to call it a day.
I’m sorry to say that I have not enjoyed the Eternal at all and would blindly pick either of the other two (or many many other IEMs) before choosing these.
That doesn’t mean everyone will hate them, we all have different tastes, but these are certainly not for me!
As always, this is also available in Spanish both on my blog (here) and on YouTube (here)
INTRODUCTION AND DISCLAIMER:
The 7Hz Eternal is an in-ear monitor (IEM) which uses a single 14.5mm dynamic driver with a liquid crystal polymer diaphragm. The Eternal was provided to me by Shenzhen Audio in exchange for my evaluation. The Eternal retails for $249.SOURCES:
I have used the 7Hz Eternal with the following sources:- Qudelix 5K
- E1DA 9038S
XenosBroodLord’s Library | Last.fm
PACKAGING AND ACCESSORIES:
The 7Hz Eternal comes in a rectangular teal box with a red slipcover. Technical specifications for the Eternal are provided on the rear of the slipcover in Mandarin Chinese.
In addition to the IEMs and the removable MMCX cable, the Eternal includes a heavy copper-colored metal storage case with a magnetic lid. The lid is embossed with the 7Hz logo on the bottom right-hand corner. The Eternal also includes two plastic clamshell eartip storage containers and four different sets of eartips. In total, 22 eartips are included with the Eternal. In terms of documentation, a warranty card, warranty instructions, and a quality control chit are included with the Eternal. All documentation is provided in Chinese only.
BUILD QUALITY AND DESIGN:
The Eternal has aluminum shells in the same copper hue as the storage case. The Eternal’s most distinctive physical features are the large disc-shaped faceplates. These faceplates contain a decorative inlay designed to resemble a dynamic driver and are covered by sapphire-coated optical glass lenses. There are three circular vents towards the top of each inner housing, and one pinprick vent just above the driver. “L” and “R” indicators are printed in white off to the side of the three circular vents towards the front of the IEM. “7Hz Eternal” is printed in white text below the MMCX connectors on the forward-facing side of the housings. The nozzles have a significant lip to secure eartips. The nozzles are covered by mesh, over top of which a thin metal overlay cut with a whirlwind-shaped relief is set.
Each strand of the MMCX cable is jacketed in a burgundy-colored plastic sheath. The cable hardware is copper-colored metal with silver metal accents. There is strain relief above the 3.5mm jack. The cable uses preformed earguides without memory wire. The 2-pin connectors are embossed with faint markings to indicate left and right. There is a chin-adjustment choker.
COMFORT, FIT, AND ISOLATION:
The 7Hz Eternal is intended to be worn cable up. The nozzles have a shallow insertion depth and I consistently had to use larger eartips than I normally do to get a good seal. The Eternal is more comfortable than I expected given its shape. Secureness of fit and isolation are average.
The Eternal has significant driver flex, especially with silicone eartips. The driver flex is so severe that one can move the diaphragm out of position entirely if the IEM is inserted too deeply or forcefully into the ear canal. This will result in effectively nonexistent sound reproduction out of the affected earpiece. The listener must create suction to pop the diaphragm back into place for the earpiece to function correctly, which is an imprecise and frustrating process.
MEASUREMENTS:
Measurements of the 7Hz Eternal can be found on my expanding squig.link database:7Hz Eternal — Squiglink by Bedrock Reviews
My measurements are conducted with a Dayton iMM-6 microphone using a vinyl tubing coupler and a calibrated USB sound interface. The measurements use a compensation file derived from relating my raw measurements to published measurements from Crinacle and Antdroid. There is a resonant peak around 8k. Measurements above 10 kHz are not reliable.
SOUND:
The 7Hz Eternal is a warm-sounding IEM.
The Eternal has a sub-bass-focused bass tuning with a distinct if gentle sub-bass shelf. The shelf is moderate in magnitude but allows for substantial mid-bass presence. Sub-bass extension is good but not great. Impact and slam are prioritized over speed of articulation, which is merely average. The Eternal has excellent dynamics and satisfying note weight. These qualities are especially evident listening to quieter instrumental tracks and ambient soundscapes. The bass has better than average texture.
The gentle slope of the sub-bass shelf strikes a good balance between avoiding mid-bass bleed and imparting the lower midrange with warmth. However, the upper midrange is uneven, particularly for the musical genres I listen to most. Male vocals have body and grit but their intelligibility varies. While not shouty, male vocals can come across as hazy and oversaturated. Female vocals are even more overemphasized. Female vocals are very forward and breathy. There is too much presence for distorted electric guitar-driven musical genres. While not exactly sibilant, the attack of certain string and woodwind instruments can be a bit aggressive at higher volumes. On the other hand, both physical drum kits and synthesized percussion have a natural-sounding timbre. This combined with the bass characteristics described above means that percussion is a joy to listen to on the Eternal.
The treble response avoids harshness but is too muted and relaxed for my preferences. There is some lower treble but little mid-treble. Upper treble extension is poor. Detail retrieval is lacking for the price, and treble transient delivery is wispy and poorly defined. The soundstage is expansive for a single dynamic driver design, and instrument separation and imaging are excellent.
SOURCE PAIRING:
The 7Hz Eternal is hard to drive and requires a quality source device. I did not notice any hiss during my listening on any of my source devices.
COMPARISON WITH THE SEEAUDIO BRAVERY:
SeeAudio Bravery Review7Hz Eternal, SeeAudio Bravery — Squiglink by Bedrock Reviews
The SeeAudio Bravery is an IEM with four balanced armatures (BA) per housing which retails for $279.
The Eternal has more satisfying bass than the Bravery. The Bravery has more immediate slam and impact to percussion hits than the Eternal, but the Eternal has fuller, more resonant bass delivery. The Bravery sounds slightly hollow in comparison and the characteristic percussion compression inherent to many BA designs is evident. The Bravery’s bass is more agile than the Eternal’s.
The Bravery has a much more correct-sounding midrange than the Eternal. Heavy rock genres are much easier to enjoy as male vocals and distorted electric guitars do not sound like they are competing for the listener’s attention as they do with the Eternal. With the Bravery, male vocals have better intelligibility. Female vocals are still quite forward but do sound a bit more reined in than with the Eternal. The Bravery has fewer issues with sibilance.
The Bravery’s mid-treble is slightly overemphasized, so there is an excess of sparkle to cymbal hits, but the Bravery is head-and-shoulders above the Eternal in terms of detail retrieval. However, where the Eternal’s treble transients sound indistinct, the Bravery’s treble transients sound over-sharpened. The Bravery has a more expansive soundstage and superior instrument separation.
The Eternal is harder to drive than the Bravery.
The Bravery and the Eternal have very different physical aesthetics, but the build quality and variety of included accessories are comparable between the two. Both are what I would expect from a $250–300 IEM. The Bravery has more extravagant packaging.
CLOSING WORDS:
The 7Hz Eternal is a fun-sounding IEM carried by the strength of its bass performance. The toe-tapping physicality of the Eternal’s dynamic driver is frequently successful in distracting the listener from the less-than-ideal upper midrange and underwhelming detail retrieval. With that said, there are better options at this price point for critical listening.
The 7Hz Eternal can be purchased here:
7HZ Eternal Earphone IEMs 14.5mm Dynamic Driver IEM HiFi Music Monit (shenzhenaudio.com)
7Hertz is back with a new player in the ever-raging sea of IEMs flooding the portable Audio scene. This time with a single dynamic driver, the previous one being a magnetic planar. Enter, 7Hertz Eternal.
FOREWORD
- I would like to thank 7Hertz for this unit which was sent to me for review purposes
- My 7Hz Eternal has undergone 150 hours of playtime
- I don’t do measurements, I just describe what I hear, from my own POV
- I don’t use EQ
- The entirety of my impressions was done with slow rebound foam tips
- Ultimately, my reviews are purely subjective and biased to my personal preference in sound
EQUIPMENT
- CEntrance DACport HD
- VE MEGATRON
- xDuoo Link2 BAL
- Ovidius B1
- Cayin RU6
- LG V50 ThinQ
- Sony Xperia X Compact (USB 2.0 host)
- HiBy Music Player (USB Exclusive Mode)
- FLAC Lossless Files
- iFi ZEN DAC V2 + ZEN Can
The Build
7Hz Eternal looked to me like a twin sibling to Timeless, literally. For the shell is the same mold, housing a large single LCP (Liquid Crystal Polymer) diaphragm dynamic-driver sized 14.5mm each side (rated 30 Ohm, 109db of sensitivity). The older sibling, Timeless was a 14.2mm Magnetic Planar.But that’s where the similarities end, Eternal comes in dark anodized bronze with a very distinctive and unique sapphire glass faceplates which will reflect blueish under different lighting conditions. On the look alone the Eternal is quite an eye candy. Majestically beautiful and elegant.
Despite the non-conventional shape, ergonomically Eternal sits flush into my ear outer cavities. While the outer shell appeared flat, the inner side has a shape designed to accommodate anchoring to the ear concha without imparting any sense of discomfort. The fact is, I have worn many other IEMs which has more “organic” shells and they are quite comfortable. The Eternal on the other hand would need some adjustment to get the feel of not being intrusive. After a while, it was comfortable enough that I have fallen asleep a few times with the Eternal still plugged into my ears.
Accompanying the Eternal, equally elegant cable made of high-purity OCC + silver plating. Designed to complement the intended sonic tuning for Eternal. It is beautiful as it is robust. Proper coaxial shielding to inspire longevity and resistance to RF interferences.
To complete the whole package, Eternal comes with Two sets of silicone ear tips, ancillary foam tips and a storage box. For those liking their IEMs packaged properly, Eternal will not fail to impress.
The Sound
DYNAMICS, TONE AND TIMBRE
7Hz Eternal is a neutral sounding unit. Or as close to Diffused Field Neutral sound curve as possible. Which means it is almost flat sounding much similar to Etymotic ER2XR. However, I use the word close to being neutral, which means Eternal is not quite as flat. I can audibly hear boosted elevation of lower frequencies that resulted in better dynamic density that helps with keeping note weight wholesome. Timbral wise it is organic as it is natural sounding. There’s no hint of metallic or dryness to the overall presentation. What is certain, 7Hz intentionally tuned Eternal to veer away from the wildly popular Harman curve sound (which was the basis for Timeless). This somewhat flat sound will not be something for those preferring their Bass big and euphonic. The characteristics of dynamics itself, markedly well reined-in to not exhibit any sort of aggression or vibrancy to attack and transients. Eternal is very refined, crisp yet smooth – mature sounding.
MIDS
Being close to neutral flat, Eternal Mids are well presented with rich and natural overtones. It is not exactly warm, nor it is bright. Mids texture being rich and detailed. The imaging and staging of Mids is the cornerstone for the overall crisp theme of Eternal sound signature, it starts here. Again, if I am to compare with an IEM that I knew very well like the back of my hand, Etymotic ER series, there’s similarities in the presentation of Mids to Eternal. The exception perhaps on ER2XR it is a bit more forward and pronounced.
Instruments be it acoustic, percussions or electronics sounded realistic and well rounded. The density of note weight feels about right. Vocals exhibited similar natural output. It does not matter be it female or male vocals. Eternal presented them all with great transparency to the intended sound. Alison Krauss with her ever peaky Soprano voice, borderline shrill on crescendos yet not sibilant. Diana Krall’s chesty and lush Contralto vocals sounding lifelike. The same goes for Sinne Eeg and some of the male singers that I listen to regularly. Even Burzum’s Varg Vickerness wailing misanthropic singing sounded “tolerable” with the Eternal.
TREBLE
Treble of Eternal is well controlled to not appear unnaturally bright. There’s just about right amount of sparkle and shimmer to keep it lively. However, it does exhibit great extensions which comes as subtly crisp. The decays focusing on prompt dispersal rather than lingering sensations. Treble macro details evidently strong and rich, micro details subtle. This in turn helps to eliminate the chance of inducing Treble fatigue as would be observed with some energetic and bright sounding IEMs. The biggest appeal for me on Eternal’s Treble, it sounds very realistic. Cymbals and acoustic peaks being organically smooth, absolutely free from any hint of grainy edges or harshness.
BASS
As mentioned earlier. Eternal Bass is not the highlight of this unit, especially not for V shape sound enthusiasts. The overall theme for Eternal’s Bass is fast, tidy, and natural. Mid-Bass seems to exhibit slight dominance over Sub-Bass. I am saying this because it is pretty much expected of a flatter tuned device to behave that way. While Bass remained well controlled for the most part, it does live up to the occasions when played with Bass heavy tracks. Perhaps not as vibrant or energetic for electronic type of Bass. But for percussions and acoustic Bass, it is satisfyingly good with proper richness and texture. Sub-Bass on the other hand, seemingly taking the back seat for the most part, does came alive and better pronounced on some tracks which has been mastered properly. Otherwise on less than competent mastering, Sub-Bass could almost completely disappear into the background.
TECHNICALITIES
Let’s start with the not so pleasant truth first. Soundstage for Eternal is not exactly stellar. I have had higher expectations of the Eternal soundstage. What I am hearing is a collection of sound layers being closely grouped together Left and Right – traditionally Stereo if you will. Perhaps being a purist single driver attributed to this element. The imaging is sharp and precise, however spatial positioning is not holographic – again due to the Left/Right bias as noted earlier. What does remain admirable is how clean the separation lines are. It must be noted that, I observed Eternal soundstage becomes somewhat cramped in as the complexity of the music goes higher. This baffled me a bit, for Eternal is a very fast driver in fact. For outright fast paced music up to 250 BPM, Eternal handles them flawlessly like a champ, but when the layers get complex, the spectrum of width started to cave in closer together. My theory on this, that big single DD wasn’t agile enough to handle complex transients on its own despite having speedy driver responses. A matter of saying, I hear better transient responses and holographic imaging from well executed multi drivers IEMs.
On the other hand, Eternal excel with details handling. Superb transparency and coherence attributed to crisp details retrieval be it macro or micro. The downside of this, Eternal will sound best with better sources and recordings. On poorly recorded or mastered materials, the flaw will be revealed, and this can be unpleasant at times. Such is the price to pay for detailed transparency.
Now, this is important. I make it simple. 7Hz Eternal is NOT an IEM to be used with weak sources. While it is already good sounding with anything 1 Vrms or below, 2 Vrms is the minimum to make it shine. Even with my 2 Vrms LG V50 ThinQ in High Gain mode, I find the output less than satisfying as compared to when driven with 4.1 Vrms CEntrance DACport HD or 4.7 Vrms VE Megatron. Equally amazing as well with the likes of Ovidius B1 (2 Vrms), Cayin RU6 (2 Vrms high gain NOS), and xDuoo Link2 BAL (4.1 Vrms). The funny thing is, loudness levels will remain low, like on Megatron I keep it at 3/32 max for the volume, but it is the sheer power of overall feed is what matters the most. In contrast, I believe Eternal is even more power hungry than Timeless is, despite Timeless being a magnetic planar.
And yes, one more thing, I am pleasantly surprised that Eternal is not susceptible to picking up floor noises like most other sensitive IEMs. Be it VE Megatron or Ovidius B1 (both being noisy with most IEMs), I am hearing clean and silent background – icing on the cake for me.
REFLECTIONS
7Hertz Eternal ultimately is a very refined unit – tonal and timbral balance is faithfully natural and polished. Technicalities being top notch (aside from the issues with soundstage and spatial positioning). Eternal will appeal greatly for those seeking crispy organic sounding unit that is mature and relaxing. Keeping it sharp with details and imaging while being musical. Going back to comparison between Timeless and Eternal, it is clear to me that the older sibling, Timeless is tuned differently – Harman-ish mild V sound that is more energetic and vibrant, in contrast Eternal is less aggressive, flatter and more subtle on attack. This is like comparing Beyerdynamic DT990 Pro versus Sennheiser HD600 – two iconic headphones which are known to be anything but identical sounding. The analogy, DT990 Pro being Timeless and HD600 being Eternal, if that makes any sense. Any which way, to own an Eternal is a commitment to drive it properly. Anything less than 2 Vrms and very likely the sound will fell short of its true potential.
CT007
Huh, dynamic driver??? Wake me up when Timeless v2 arrives! 
gadgetgod
Heard it yesterday myself,
Man spectacular bass response. A fun and immersive pair, although imaging could be better.
Man spectacular bass response. A fun and immersive pair, although imaging could be better.
drbluenewmexico
Great review! After 80 hours burn in my set finally listenable through N3pro 4.4 bal but highs still shrill on female voices
Then..connectected to Microzotl OG tube amp on Mojo Audio linear power supply 2 v rms I think….and BOOM Eternals came ALIVE
sound like full size headphones in my head..great tone PRAT and musicality and treble harshness gone!! I am using Earman superb Trudatto
DAC in the chain from an iPod air. And sound is super analogue flavor…..amazed!! So it’s a desktop iem…unless you get a super powerful portable amp I guess…but very worthy….bravo Eternal and 7HZ! EDM totally well controlled bass with enough amp power and is like hammer inside my head!
Then..connectected to Microzotl OG tube amp on Mojo Audio linear power supply 2 v rms I think….and BOOM Eternals came ALIVE
sound like full size headphones in my head..great tone PRAT and musicality and treble harshness gone!! I am using Earman superb Trudatto
DAC in the chain from an iPod air. And sound is super analogue flavor…..amazed!! So it’s a desktop iem…unless you get a super powerful portable amp I guess…but very worthy….bravo Eternal and 7HZ! EDM totally well controlled bass with enough amp power and is like hammer inside my head!
