Precog's IEM Reviews & Impressions

Nov 9, 2021 at 12:57 AM Post #1,696 of 3,716
...with the stock cable (frankly, I think this is a subpar quality cable that should be swapped) and ear tips
I despise the LX to the point I will never do anything besides snort derisively every time it's mentioned. But it sounds so fundamentally different that I find it hard to even compare to Evo. I gave the LX another try after Evo, the distaste was the same, but perhaps different from my first time with it.

And definitely agree with the cable. It either should have been Cardas or one of those warm silvers. I would gladly stomach an Odin pricetag for a SB analogue.
 
Nov 9, 2021 at 6:02 PM Post #1,697 of 3,716
LETSHUOER EJ07M Impressions

From the company that brought you the infamous Tape Pro that I lauded for its mind-boggling(ly horrible) sonic prowess, here we have the EJ07M, the mass-production version of the polarizing EJ07. Admittedly, I was on the fence about whether I wanted to hear the EJ07M when LETSHUOER asked, but preconceived notions aside, I’m pleased that I gave it a shot because - believe it or not - the EJ07M is actually pretty good.

graph-8.png

That said, the bass on the EJ07M is something of an enigma. Despite the healthy sub-bass shelf, it comes across as tamer in terms of presence on the stage. Perhaps this is attributable to the excellent dynamic range of the bass; the dynamic driver being used here is very bouncy and sports no shortage of texture at that. Decay is also right around where it should be; in fact, I feel that the only parts lacking about this bass response are 1) the sheer slam and 2) extension. It’s a tad below average in those departments for this price point, yet it doesn't seem particularly pillowy ether, which is why I deemed it an enigma despite it being pretty great otherwise.

My thoughts on the EJ07M’s midrange tonality could honestly mostly be a copy-and-paste of my reviews on the Moondrop B2 Dusk and Thieaudio Clairvoyance (slightly leaner to some listeners, upper-midrange oriented, yada-yada). Needless to say that I like it and it is very close to my perceived neutrality. Now, it’s a minor thing that I don’t talk about often, but I have a soft spot for the transient behavior of the EJ07M’s midrange. It reminds me a lot of Tanchjim’s hybrid IEMs wherein decay has a slightly elongated taper that is devoid of egregious grain; you can tell that the drivers being used - ostensibly Sonions - are of high quality. In this vein, I do think that the EJ07M surpasses the aforementioned IEMs for midrange quality. The texture of vocalists like Punch on "Say Yes" and IU on "Blueming" come across really nicely on this IEM for my preferences. They almost sound sort of sweet and peachy, if that makes sense even.

But for an IEM sporting four EST drivers, the treble on the EJ07M is somewhat middling. It’s not nearly as bad as some early EST implementations I’ve heard, but it does harken to, say, the Moondrop Solis to some degree wherein there’s a lack of attack incisiveness, zest that I’m looking for. I’d say this is partly due to what sounds like some minor recessions at around 5kHz and a more subtle one in the mid-treble. It’s a mostly smooth presentation that certainly won’t offend, but again, it’s a little too tame for my liking. Extension itself is about par with the other middling implementations of the EST drivers that I’ve heard like the Thieaudio and the MEST twins. Not bad, but not great.

Technicalities on the EJ07M are decent enough, probably around A- level. I should purchase a Moondrop Variations so I have a $550 benchmark for A/B purposes, but from memory, I do believe the Variations edges out the EJ07M for sheer clarity; the EJ07M probably falls closer to being par with the Thieaudio Clairvoyance (without sounding as dampened and cheap in the transients). I want to say staging on the EJ07M generally leans toward the more intimate side; however, I do hear instances of above average width. Coherency on the EJ07M is questionable. I don't think there's anything necessarily wrong on its own, but the dynamic range of the bass is clearly better than the midrange which, in turn, is seemingly better than the treble.

I think my thoughts earlier about the EJ07M's bass largely sums up my thoughts as a whole: the EJ07M is definitely a good IEM - it does everything right on the surface - but there are little things here and there that could be touched up to take it to the next level. That's me being a nasty critic, though, and it's to be expected at this price point. That in mind, not only is the EJ07M is a competitive IEM against the other tri-brid hotshots, but this is also a major improvement from the Tape Pro that has uplifted my opinion of the brand significantly.

Score: 6/10
 
Nov 10, 2021 at 3:47 AM Post #1,698 of 3,716
LETSHUOER EJ07M Impressions

From the company that brought you the infamous Tape Pro that I lauded for its mind-boggling(ly horrible) sonic prowess, here we have the EJ07M, the mass-production version of the polarizing EJ07. Admittedly, I was on the fence about whether I wanted to hear the EJ07M when LETSHUOER asked, but preconceived notions aside, I’m pleased that I gave it a shot because - believe it or not - the EJ07M is actually pretty good.

graph-8.png

That said, the bass on the EJ07M is something of an enigma. Despite the healthy sub-bass shelf, it comes across as tamer in terms of presence on the stage. Perhaps this is attributable to the excellent dynamic range of the bass; the dynamic driver being used here is very bouncy and sports no shortage of texture at that. Decay is also right around where it should be; in fact, I feel that the only parts lacking about this bass response are 1) the sheer slam and 2) extension. It’s a tad below average in those departments for this price point, yet it doesn't seem particularly pillowy ether, which is why I deemed it an enigma despite it being pretty great otherwise.

My thoughts on the EJ07M’s midrange tonality could honestly mostly be a copy-and-paste of my reviews on the Moondrop B2 Dusk and Thieaudio Clairvoyance (slightly leaner to some listeners, upper-midrange oriented, yada-yada). Needless to say that I like it and it is very close to my perceived neutrality. Now, it’s a minor thing that I don’t talk about often, but I have a soft spot for the transient behavior of the EJ07M’s midrange. It reminds me a lot of Tanchjim’s hybrid IEMs wherein decay has a slightly elongated taper that is devoid of egregious grain; you can tell that the drivers being used - ostensibly Sonions - are of high quality. In this vein, I do think that the EJ07M surpasses the aforementioned IEMs for midrange quality. The texture of vocalists like Punch on "Say Yes" and IU on "Blueming" come across really nicely on this IEM for my preferences. They almost sound sort of sweet and peachy, if that makes sense even.

But for an IEM sporting four EST drivers, the treble on the EJ07M is somewhat middling. It’s not nearly as bad as some early EST implementations I’ve heard, but it does harken to, say, the Moondrop Solis to some degree wherein there’s a lack of attack incisiveness, zest that I’m looking for. I’d say this is partly due to what sounds like some minor recessions at around 5kHz and a more subtle one in the mid-treble. It’s a mostly smooth presentation that certainly won’t offend, but again, it’s a little too tame for my liking. Extension itself is about par with the other middling implementations of the EST drivers that I’ve heard like the Thieaudio and the MEST twins. Not bad, but not great.

Technicalities on the EJ07M are decent enough, probably around A- level. I should purchase a Moondrop Variations so I have a $550 benchmark for A/B purposes, but from memory, I do believe the Variations edges out the EJ07M for sheer clarity; the EJ07M probably falls closer to being par with the Thieaudio Clairvoyance (without sounding as dampened and cheap in the transients). I want to say staging on the EJ07M generally leans toward the more intimate side; however, I do hear instances of above average width. Coherency on the EJ07M is questionable. I don't think there's anything necessarily wrong on its own, but the dynamic range of the bass is clearly better than the midrange which, in turn, is seemingly better than the treble.

I think my thoughts earlier about the EJ07M's bass largely sums up my thoughts as a whole: the EJ07M is definitely a good IEM - it does everything right on the surface - but there are little things here and there that could be touched up to take it to the next level. That's me being a nasty critic, though, and it's to be expected at this price point. That in mind, not only is the EJ07M is a competitive IEM against the other tri-brid hotshots, but this is also a major improvement from the Tape Pro that has uplifted my opinion of the brand significantly.

Score: 6/10

@Precogvision , thanks for your thoughts. Do you have some Tanchjim Tanya/Oxygen filters around you could put on 07m nozzle? Seems that the short nozzle just creates resonance peaks for some people, and this "mod" seems to prevent it - to some people, it's literally night and day.

I know you have to review it stock, but just curious to know if they change anything for you.
 
Nov 10, 2021 at 3:53 AM Post #1,699 of 3,716
@Precogvision , thanks for your thoughts. Do you have some Tanchjim Tanya/Oxygen filters around you could put on 07m nozzle? Seems that the short nozzle just creates resonance peaks for some people, and this "mod" seems to prevent it - to some people, it's literally night and day.

I know you have to review it stock, but just curious to know if they change anything for you.

If the treble was already tame for Precog, I would imagine the Tanchjim filters will dull it further. They are great at curbing uppermids and treble.
 
Nov 10, 2021 at 4:02 AM Post #1,700 of 3,716
If the treble was already tame for Precog, I would imagine the Tanchjim filters will dull it further. They are great at curbing uppermids and treble.

Yes, you're right. I never expected for him to like its treble - its darker than his preferences. I just wanna know if they have any influence on him or not :)

graph (60).png


I just mentioned since they were a deal breaker to some people close to me. From meh to omg very quick. I had no problems, but I have short canals. One of my buddies could only hear mids on his face before the filter, as an example.

07m nozzles are just plain dumb and the first time I had struggles getting perfect seal.
 
Nov 10, 2021 at 1:01 PM Post #1,701 of 3,716
Great impressions. Do you think you'd have scored it higher if you enjoyed the level of bass it offers? I for one would not be satisfied with Odin's more neutral bass, no matter the quality. Also, the stock tips (and cable) bloat the midbass big time, and attenuate the treble, excatly what you were hearing. Swap out some Acoustune AET07 tips and you'll hear what I mean. It's not subtle either. Swap out the cable for something more linear (anything with Cardas copper for example) and it'll push the EVO even further. Such is life at the high end, but I get that you can only review the baseline.
Yes, I'd likely give it an 8/10 if the bass shelf was more controlled.

@Precogvision , thanks for your thoughts. Do you have some Tanchjim Tanya/Oxygen filters around you could put on 07m nozzle? Seems that the short nozzle just creates resonance peaks for some people, and this "mod" seems to prevent it - to some people, it's literally night and day.

I know you have to review it stock, but just curious to know if they change anything for you.

Sorry, I do not. Actually, I don't hear any egregious resonance peaks; the treble is already fairly smooth to my ears haha.
 
Nov 12, 2021 at 3:11 PM Post #1,702 of 3,716
64 Audio A4s

https://www.headphones.com/community/reviews-learning-and-news/64-audio-a4s-review

graph (4).png

Don't trust the accuracy of these measurements, especially in the treble region. This was done using putty to form a seal around the coupler and the IEM and even very small adjustments of placement would change the response dramatically from one measurement to another.

Hey everyone! I received this a couple weeks ago courtesy of 64 Audio, so I already have a full-review that's been published above. I'll drop some eye-candy and some quick thoughts here, though. I'd say the A4s has got a really good tuning overall (especially for bassheads!), minus the treble region where it could use some more lower-and-mid treble. There, it has something of a "feathery" tactility to the treble where I find myself desiring more body despite the good extension. Technicalities are alright, nothing crazy, timbre and detail retrieval could probably be better. It's basically good enough for daily-driver material, but it's not going to stack up against the kilobuck heavy-hitters that are indexing for a more technical sound. That in mind, this wouldn't be my first recommendation if you're after the best sounding IEM at a kilobuck unless you're indexing very strongly for the bass response. But within the context of CIEMs - which are more limited in terms of the competition - I believe this is a solid recommendation. Stack on 64A's Apex technology and fantastic customization, and the A4s makes a fun package for someone after a more entry-level CIEM.

Speaking of CIEMs, while I don't know if they're game changer, they're definitely pretty cool. The isolation on the A4s is terrific even with the M15 modules, yet I don't experience any pressure build-up and can wear them for 5+ hours no problem. You can even sleep on your side to some degree thanks to how flush they sit with your ear. The main drawback that I can think of is earwax build up. You do have to clean them more frequently or else they get sort of squeaky in the ear haha. But not having to worry about ear tips is another nice bonus.

a4s4.JPG

a4s8.JPG

a4s11.JPG
 
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Nov 12, 2021 at 5:16 PM Post #1,703 of 3,716
64 Audio A4s

https://www.headphones.com/community/reviews-learning-and-news/64-audio-a4s-review

graph (4).png
Don't trust the accuracy of these measurements, especially in the treble region. This was done using putty to form a seal around the coupler and the IEM and even very small adjustments of placement would change the response dramatically from one measurement to another.

Hey everyone! I received this a couple weeks ago courtesy of 64 Audio, so I already have a full-review that's been published above. I'll drop some eye-candy and some quick thoughts here, though. I'd say the A4s has got a really good tuning overall (especially for bassheads!), minus the treble region where it could use some more lower-and-mid treble. There, it has something of a "feathery" tactility to the treble where I find myself desiring more body despite the good extension. Technicalities are alright, nothing crazy, timbre and detail retrieval could probably be better. It's basically good enough for daily-driver material, but it's not going to stack up against the kilobuck heavy-hitters that are indexing for a more technical sound. That in mind, this wouldn't be my first recommendation if you're after the best sounding IEM at a kilobuck unless you're indexing very strongly for the bass response. But within the context of CIEMs - which are more limited in terms of the competition - I believe this is a solid recommendation. Stack on 64A's Apex technology and fantastic customization, and the A4s makes a fun package for someone after a more entry-level CIEM.

Speaking of CIEMs, while I don't know if they're game changer, they're definitely pretty cool. The isolation on the A4s is terrific even with the M15 modules, yet I don't experience any pressure build-up and can wear them for 5+ hours no problem. You can even sleep on your side to some degree thanks to how flush they sit with your ear. The main drawback that I can think of is earwax build up. You do have to clean them more frequently or else they get sort of squeaky in the ear haha. But not having to worry about ear tips is another nice bonus.

a4s4.JPG
a4s8.JPG
a4s11.JPG
How does the bass of the A4t compare to the IE900?
 
Nov 12, 2021 at 6:38 PM Post #1,704 of 3,716
How does the bass of the A4t compare to the IE900?

I sold my IE900 a while back, so this is from memory. They have a similar tuning profile, A4s (I'm assuming you meant the A4s, as A4t is now discontinued haha) is just a tad more sub-bass heavy and cleaner in the mid-bass. The IE900's bass has better tactility and dynamics, sounding more natural. Overall, I'd rank IE900's bass response higher with the right tips.
 
Nov 12, 2021 at 6:59 PM Post #1,705 of 3,716
That in mind, this wouldn't be my first recommendation if you're after the best sounding IEM at a kilobuck unless you're indexing very strongly for the bass response.
Great review because it’s honest.
 
Nov 14, 2021 at 8:32 AM Post #1,706 of 3,716
Hey, I recently sold my ie900 even though I believe it was a very good IEM. I thought the vocals were drowned out a bit too much by the treble. So I am looking for my next IEM.

I am trying to find a good IEM for vocals and natural dynamics, I've read a lot of precogs reviews and it seems like the u6t is a perfect IEM for my preferences.

I've also been very curious about buying MEST MKII (since it gets a lot of praise) how does that compare to the ie900 in terms of mid/vocals? You gave the MEST2 an 8/10 for mids compared to the ie900 which received a 5/10 (quite understandably), but according to the frequency response, they are both similar in how they elevate from presence region to 8k and lack of pinna compensation.
 
Nov 14, 2021 at 10:16 AM Post #1,707 of 3,716
Hey, I recently sold my ie900 even though I believe it was a very good IEM. I thought the vocals were drowned out a bit too much by the treble. So I am looking for my next IEM.

I am trying to find a good IEM for vocals and natural dynamics, I've read a lot of precogs reviews and it seems like the u6t is a perfect IEM for my preferences.

I've also been very curious about buying MEST MKII (since it gets a lot of praise) how does that compare to the ie900 in terms of mid/vocals? You gave the MEST2 an 8/10 for mids compared to the ie900 which received a 5/10 (quite understandably), but according to the frequency response, they are both similar in how they elevate from presence region to 8k and lack of pinna compensation.
Mest Mk2 can sound far different with different daps.
RS6 and LPGT pair well with Mest Mk2, but I prefer RS6 that Is meatier on mids.
Wich is your dap?
@Scuba Devils own both IEMs and can help you.
 
Nov 14, 2021 at 10:54 AM Post #1,709 of 3,716
I preferred Crassirostris with W2 instead of Mest Mk2.
 
Nov 14, 2021 at 2:37 PM Post #1,710 of 3,716
Hey, I recently sold my ie900 even though I believe it was a very good IEM. I thought the vocals were drowned out a bit too much by the treble. So I am looking for my next IEM.

I am trying to find a good IEM for vocals and natural dynamics, I've read a lot of precogs reviews and it seems like the u6t is a perfect IEM for my preferences.

I've also been very curious about buying MEST MKII (since it gets a lot of praise) how does that compare to the ie900 in terms of mid/vocals? You gave the MEST2 an 8/10 for mids compared to the ie900 which received a 5/10 (quite understandably), but according to the frequency response, they are both similar in how they elevate from presence region to 8k and lack of pinna compensation.

I love IE900 but agree that it's not one I'd reach for when listening to vocal centric music. The mids definitely somewhat recessed - my main choices of music for IE900 tend to be various sub-genres of electronic music; techno, house, D&B etc. which IE900 suits perfectly in my experience.

MEST MKII definitely a better choice for vocals but it's an IEM I've had mixed feelings about and as @Xinlisupreme said, seems to require good DAP pairing.

Have you considered the Oriolus Isabellae? Fantastic with vocals and a very lush, organic sound.
 

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