BASN AS-ONE

BASN ASONE Review​

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BASN ASONE ​

Intro ​

Hello, today I am reviewing one of BASN Audio’s latest iems, the “BASN ASONE“. The ASONE just so happens to be a planar magnetic driver iem that I have been eyeing up for quite some time. So, I thank BASN for providing the ASONE for a full review and feature at Mobileaudiophile.com. I have to say that I’ve been impressed with the ASONE, and I am quite surprised that we don’t see more out of this company within the community. I’ll just get this out of the way right now… The ASONE is a nicely tuned set which quite easily stands next to the better sets within the price point as far as planar iems are concerned. In my opinion of course. This company is quite new to me although I’ve seen their iems floating around Amazon US for a long time. I just never took the plunge and purchased anything. I suppose BASN is certainly worth looking further into.

BASN ​

The audio company BASN has been around for quite some time and seem to specialize in gear for stage use. They have created many iems in the past with sets like the Bmaster, Bsinger, Metalen, Bmaster 5, as well as their planar series featuring the Asone (the set I’m reviewing today), and top tier model, the MTPro. There also happens to be some off-shoots to some of their sets which you can find by visiting the BASN website. From what I can tell this is a company who is looking to get more into the casual listening side of the business rather than strictly for stage use purposes, which is where mobileaudiophile.com comes in. Take that as a grain of salt though as it is just speculation.
I hope to find out just how well the ASONE competes in the $100 to $200 range of planar driven iems and hope to explain the sound in a way that will help prospective buyers. So, without further ado…The BASN ASONE….

Purchasing links:​

–Amazon
–BASN Audio
-Also check out all of BASN products HERE

Gear used for testing​

–Ifi Go Blu

–Hidizs S9 Pro

–iBasso DX240 with Amp8 MK2

–Shanling M6 Ultra

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Packaging & Accessories​

I was not expecting what I found when going through the unboxing of the BASN ASONE. It was quite impressive actually. I mean, my mind wasn’t blown but BASN offers a nice package. First, the box is rectangular and of pretty good size. The box itself is a white box with a sleeve and on the sleeve is a picture of the ASONE as well as some specs. Nothing crazy there. However, once you slip off the sleeve and open the box there is a nice bounty of usable accessories inside. The first thing that jumps out at you is the earphones themselves and secondly, you’ll notice the high-quality carrying case. There are also two cables, one with a mic and one without, nine pairs of eartips, a cable clip, nozzle cleaning brush, mmcx tool, as well as a ¼” adapter. In total I am very impressed with what you receive for $149. All accessories are high quality which I seldom ever say under $200.

Carrying Case​

One of the cooler elements of the unboxing is an extremely nice carrying case. Ya know, in almost every review that features a case I will remark on how I don’t use them often. However, I am going to have to take that back. Friends, the provided case is phenomenal. First off, the case is all aluminum alloy with a classy, ribbed top and the name “BASN” imposed in the center. Opening the case, you’ll notice the stainless-steel latch which is a nice feature. Inside is very neat as you’ll see many pockets to store your gear and please trust me, you have a ton of room inside. At least enough for a couple earphones, a dongle dac etc. Truly a gorgeous case that other companies need to follow suit on. I will most certainly use the BASN carrying case and I have to say, job well done BASN!

Eartips​

Another surprise was the eartips provided by BASN as they added nine pairs in total and all are nice quality eartips. I received three pairs (S, M, L) of your regular “run ‘o the mill” white silicone tips with a semi-wide bore and a sturdy flange which are very usable. I also received three pairs (S, M, L) of Triple Flange eartips and they too are sturdy and not flimsy with a good feel to them. The last set provided in the packaging are three sets (S, M, L) of foam tips and once again they are actually of good quality. Folks, I have to hand it to Basn as they actually provide usable and good quality eartips which is not a common occurrence.

What I used
I love all the stick tips, but I did notice the ASONE didn’t respond as well as I liked to my ears, so I began tip-rolling and ended up using the KBear 07 tips. If you’ve spent any time reading any review that I’ve ever published then you’ll know that the 07’s are pretty much my go to in most situations. I found the 07’s gave a hair more openness in the upper mids and helped the bass to have a bit more of a concrete punch down low. Not that there’s anything wrong with the included tips, I just didn’t get the seal that I wanted. For all intents and purposes… Nice job BASN!

Cables​

As far as cables are concerned, BASN includes not just one, but two cables in the packaging. One of the cables provided is an MMCX 3.5 single ended cable with a mic for phone calls. Easily one of the better mic’d-up cables I’ve ever received. I have not tested the mic and controls. The 2nd cable included is a beautiful brown MMCX 3.5 single ended, Single Crystal Copper cable with a very nice Litz woven structure. This is a cable which is fitting of the price and is actually very nice. This happens to be the cable I used for any 3.5 single ended listening. However, when I turned to balanced sources, I decided to use a white MMCX HifiHear balanced cable which you will see pictured in many photos. Honestly, BASN obviously understands that cables matter and it was very nice to see quality cables provided. I wish more companies understood this and thankfully at least BASN does.

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Build / Design / Internals / Fit / Drivability​

Build Quality​

As far as build is concerned the ASONE is made completely of a plastic resin material which was likely decided upon for the purpose of weight and keeping the ASONE light in the ear. I do think that BASN succeeded in this effort. I will say that although the plastic is light, it is also pretty durable feeling. The build is really well constructed in my opinion. Make no mistake though, we have certainly seen great build quality in this price point. In fact, we’ve seen amazing builds on far less expensive iems. In this situation, the build quality serves the purpose for which it is made. The feel is still structurally sound, with no burs or manufacturing defects. I’d say that BASN nailed what they were going for. It’s light, ergonomic enough, and comfortable on the ear. For a plastic material…the ASONE is nice.

Also, the nozzle is of medium length and BASN incorporates a nice metal grill at the nozzle tip. In the top you’ll see the MMCX female connections where the cables attach, and they seem to be of good quality, nothing loosey-goosey. Not bad at all.

Design​

One thing I thought right away was the unique and boujee type design of the ASONE. The ASONE comes in five different colorways. The set that I received is the only “all clear” set as the color is… clear. The other colors to choose from are Pink, Gray, White & Blue. All colors were well chosen as each has a splendid look that shows off the build design and aesthetic very well. The faceplate area has a very cool honeycomb style pattern that I have never seen before this set. I adore the clear set that I have as I can see all the inner workings of the ASONE but I do think that all colors are very nice. The ASONE is a dope looking set friends, I truly think that BASN did a fantastic job designing something that the market hasn’t really seen. Peering into the bottom side I can see the complete driver.

Internals​

BASN has obviously included a nice driver inside the ASONE as they employ a large 14.2 Planar Diaphragm incorporating a Double-Sided Array N52 Magnet. The ASONE uses a total of fourteen magnets to exact the sound the way the BASN wanted to. The Diaphragm itself is only 2 microns thick which is impossibly thin. Like I said, the driver is obviously a good driver and not one which I’ve heard distort or become grainy and it’s a driver which certainly can take some power.

Fit​

I have no idea how the BASN ASONE is going to fit you, but as for myself they fit very well, once I get a good seal that is. In truth, I can’t imagine many folks having an issue. I should also add that once the ASONE is seated in the ear well they feel as light as it gets. They are a very comfortable iem and I’m fairly positive that most any hobbyist would think the same. We are seeing less and less enormous planar magnetic iems and the ASONE is proof of that. Another thing happens when a good seal has occurred and that is isolation becomes very good. Not only do they isolate and attenuate outside noises but there is very little sound leakage to the outside world.

Drivability​

The BASN ASONE is rated at 16 ohms and a sensitivity of 100 db’s. For a planar they are actually pretty sensitive. Without question they will run very well off of a simple “decently powered” Dongle Dac but does thrive with added juice. Let’s put it this way, using the IFi Go Blu on single ended was fine but the sound wasn’t as refined as it was on 4.4 balanced with the ASONE. The extra power did help. Also, I used the Hidizs S9 Pro on single ended and obviously it’s enough to drive the Asone perfectly fine, and all sounded great, but the second I used a 2.5 balanced cable and pushed the power a bit it was obvious that the ASONE scales-up well. The Moondrop Dawn 4.4 running 4.4 balanced was really a perfect set-up. Both the power, tonality, and dynamism of the Dawn mixed with the warm resolve of the ASONE made a very nice match for mobile listening.

Daps​

Moving up to daps I did some listening with the very nice included 3.5 cable and the sound was truly great with both of my more powerful daps that I use for testing. That is the iBasso DX240 and the Shanling M6 Ultra. I always listened on either medium or high gain on both and found this was the best way for a dynamically expressive and big sound. Out of the two daps I enjoyed the Shanling paired with the ASONE as I had a more natural timbre with its AK4493SEQ dac chip. Synergy matters friends.

In the end​

So, in the end you will have a perfectly adequate listening experience with a simple Dongle Dac, and you’ll be all set! I feel the ASONE does scale very well with power but mostly the ASONE scales to the quality of the source. If you attach it to a more sonically gifted source, then you will have a more sonically appealing listening experience. I will also add that any source that I have with a lusher and velvet type of sound paired the best with the ASONE. Granted, I have all types of tonalities throughout my sources, and I truthfully didn’t hear anything that sounded horrible. I just think that the timbre equals out with something warmer, and you’ll have less planar timbre than with something more neutral and analytical. Hence the difference between the DX240 and the M6 Ultra. The DX240 is closer to neutral whereas the M6 Ultra is a warmer and more lush sound.

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Sound Impressions​

Note: All critical listening was done after a lengthy burn-in. I also did some tip-rolling using the KBear 07 large sized tips. All critical listening was done using both 3.5 single ended sources as well as balanced sources. All of my music is flac or better files which are stored on my devices.

Burn-in​

I just want to preface this entire section with… The BASN ASONE needs a lengthy burn-in. I know that many of you have feelings towards burn-in but there is a definite tightening up of the bass region as well as a reduction of planar timbre. Planar timbre is something that is unmistakable and easy to spot, so when that timbral issues goes away after a long burn-in… well… I guess there isn’t any more confusion about the topic. I gave the ASONE about 120 to 150 hours (roughly, best guess) of burn-in mixed with some “listen-in” over the course of a number of days. This review would actually have been completed about a week and a half earlier if it wasn’t for the lengthy process.

Completely surprised! ​

I was actually completely surprised with the overall sound quality of the ASONE. Let me start by saying that the ASONE features a musical sound yet also has a nicely technical sound too. More melodious than it is analytical though. The sound is big, full, yet also clean & airy with some rather large macro-dynamics for a planar iem. I love surprises like this as the ASONE “looks” completely unassuming and if I’m being honest, I did take it for granted. I won’t make that mistake again.

The ASONE has a warmer sounding Harman type replay with very good dynamics and a nicely resolute replay. A few words which come to my mind are… Incisive, fervent and emotive. The sound is direct, clean, and has nice vigor or energy, but does so in a warmer, rhythmic, and melodic setting. The ASONE carries a certain warmth, yet the sound isn’t at all veiled. The sound is smooth but clean, atmospheric but also a detailed replay. I realize these descriptors all sound like subtle contradictions but as I sit with them in my ears these are the words which make the most sense. Believe me, this one took me by surprise.

Peanut sized sound impressions​

The bass is big and deep for a planar magnetic earphone and it’s tidy per its size. The midrange is recessed to a slight degree, especially in the lower midrange but I also hear very nice note weight and vocal clarity. Despite the recession or midrange scoop, I found good presence and spacing. Females come across leaner and more forward, but also, they have some gleam and shimmer to them that males don’t always have. Sibilance is not a problem, and neither is there any great shout to my ears. The treble is actually well extended with some nice treble bite which is also something I didn’t expect. Details are nice so long as bass isn’t prioritized in the track and the stage is larger than average with nice imaging.

There are some shortcomings, as with any iem, and I will do my best to spell those out to you from my vantage point. Still, whether there are subtle subjective issues or not, I’m hearing a very nicely tuned and dynamic, Harman style sound. Without question this sound will not be for everyone. Some will say there’s too much low-end emphasis, some may prefer a more vocal or mid-centric replay, or some may simply desire a more neutral sounding earphone. For what it is I think that BASN put together an appealing effort that should spark some interest and suit many hobbyists. So far so good, let’s check out each 3rd of the spectrum.

Bass Region​

Folks, I will always be partial to a dynamic driver low-end. I think I’m not alone in that assessment. There are textures and timbral cues that a dynamic driver can exhort that other driver types simply have a harder time producing, so it seems. I don’t mean they “can’t”, but it’s simply a tougher task. DD’s have a certain depth and density that you cannot always get with other driver types. It doesn’t necessarily mean Dynamic Drivers are better either. We all have different tastes. The ASONE however, comes very close to a dynamic driver sound in the lower regions. There are only a few other planars that get close, and I can say that this one trades blows down low with those sets.

Sub-bass​

Beginning with the sub-bass and a track like “Groove” by Ray Wylie Hubbard, the bassline is the focal point of this track, and it quickly became evident to me that the ASONE can represent very well. I like the way that the ASONE is able to interpret that growling and gravelly sound while keeping in good control. From the genesis of each individual note to the release, there is a concreteness or conciseness at the leading edge through the release. Compact is a word which comes to mind. For instance, “Jealous” by Nick Jonas hits right away with a very deep and tactile boom, it’s compact. Listening with the ASONE I enjoy its ability it has to render a clean and tight bassline like this. You can hear the planar agility with a dynamic driver type boom and textured sound.

The sub-bass really does add a sense of haptic “feel” to any track which demands it, without overdoing it. I don’t hear anything lean or fuzzy and certainly not laid back in the lowest of lows. I think if you enjoy a more-fun representation in the sub-bass area and you listen to genres which cater to this type of bass then I’ll go out on a limb and say you’ll probably enjoy it.

Mid-bass​

The mid bass has some nice slam without spilling over too far into the midrange. Just enough I’d say. Enough to give some body to vocals and bass guitar (I’ll cover that in the “midrange”). As far as quantity, I feel the ASONE was tuned for fun and to make your head bob to your favorite track. It hits hard! No doubt about it. About 27 seconds in on “Uncle M” by Young Thug there is this penetrating and authoritative bassline which has some serious boom listening with the ASONE. Despite the emphasis on this track, I also hear a tight decay that doesn’t impede upon Young Thug’s lyrical skills. “On Melancholy Hill” is a track by the Gorillaz which is another example of the “speed-meets-quantity” coupled with very good control as the bass sort of “stays in its lane” … in a manner of speaking.

The ASONE has some oomph my friends. The ASONE can bang! Again, I find the quantity of bass doesn’t hinder the attack speed yet still decays with enough lingering harmonics to have some atmosphere attached to it. Deeper in density than the Raptgo Hook-X, but in no way is it a muddy bass for my preferences. The bass has some meat to it… some gusto. The low-end goes deep with good extension and a good slam. Just short of Bass Boi territory. This is not some forced & cheaply boosted low-end either. Better said, this bass isn’t simply arbitrarily over-emphasized to appease the mainstream. The bass has control and fits the overall tuning very well. Bass guitar has plenty of meat and presence without sounding too full or bloated. Also, depending on the track, kick drums have that satisfying hollow boom with the tacky wet edge. Pretty nice.

Downsides of the Bass Region ​

Without question this bass will not appeal to everyone. It’s accented and colors the sound. It isn’t the most natural sounding low-end either. Fans of a more neutral sound will probably desire less down low and those who simply detest bass presence and coloring in their midrange will likely not completely enjoy the ASONE. Do you want something fun? Do you want something that will help to move your feet and bolster any track with a bassline, bass guitar, kick drum etc.? If so, then you may want to stick around.

Midrange​

The midrange comes across warm, with a resolute and dynamic sound. It sounds smoother overall rather than crispy. Not dry at all and not analytical I would say. There is some recession in the midrange with a slight scoop to my ears. However, I don’t find this scoop to be a problem, as there is a very nicely textured sound for the price which sounds more natural than it doesn’t. I always look for at least marginally good vocals and midrange presence and I feel the ASONE doesn’t lack here at all. What we have is speedier transients yet with nice note weight, sound field depth and details are nice.

Lower-midrange ​

Males come across with a good amount of warmth. Warm enough to sound organic and bodied enough to have a physical intonation and realism. There is the slightest lack of resolution on some more complex tracks in this region when heavier bass tracks are playing but that should be expected. Still, listening to a deeper bass singer like Avi Kaplan in the track “On My Way” he has such a wonderful tone and timbre with a chiseled edge to his earth moving and sonorous sounding vocals. His voice carries with the right amount of resonance and harmony. Or a track like “Idol; Re-run” by Westerman shows off the lead singer’s tenor voice as it cuts right through the deep rolling bassline. His voice is well uplifted and very clean. Or a higher pitched male like Muscadine Bloodline in “Azalea Blooms” which actually comes across a bit thinner but also more forward and accentuated.

Upper-Midrange ​

The upper midrange has a cooler and more uplifted sound altogether. Females sound closer to the listener and even have some shimmer or luster to them. Not overly elevated either as I don’t hear any crazy pierce killing my ears or any bad sibilance. There is some planar timbre which shows up, but it is very minimal and easy to overlook. Female singers like Ellie Goulding in “How Long Will I Love You” are slightly boosted past natural with a sheen to her voice that sounds softer and sweeter than anything else. In my opinion she sounds beautiful with the ASONE in my ears. Her voice has this robust softness that is very well illuminated. “Stampede” by Jess Williamson shows off her more coarsely melodic voice that comes across with good body and a crisp note outline.

I find that separation of instrumentation and voices is very well accomplished with nothing that sounds congested at all. I would say that bassy tracks with more complex musical arrangements will somewhat blur a bit but those are very few and very far in between. For the most part the sound is detailed and the ASONE is able to keep up with most any track I throw at it. The midrange has great pacing and cadence with very nice note definition for the asking price.

Instruments ​

Most instruments sound nice in the midrange. Strings have a nicely technical sound with a detailed presentation. I can hear every pluck of the guitar string mostly with very nice secondary harmonics. Percussion like cymbal strikes have a solid “chisk” and are well featured. Or snares, they come across with a nice “pang”, that sounds more like an exclamation point to any snare hit than anything else. Very tight and composed and with good note structure. Piano sounds nice and resounding too. Please remember, all of these examples depend heavily on the track you are playing. I could give examples for each, but this review would be extended a bit too far. However, in my opinion these are correct generalizations that should ring true across the board.

Downsides to the midrange ​

If anything, I would say that the midrange could use less of a treble impact and ear gain as the ASONE can get slightly shouty in the right track. I didn’t hear enough of this for me to call it a “con” but it’s there when listening to overtly shouty tracks. Also, there is that slight planar timbre that I spoke of. It is there and it isn’t going anywhere. Having said that, I don’t think it’s nearly as bad as 90% of the planar iems out there. Yet it still exists. Planar timbre is that electric fuzz that resides at the note outlines. All in all, the ASONE has very nice timbre for a planar. Is there better? Sure, there is. Will it matter to 85% of hobbyists? Probably not. After that, those who like a more neutral sounding midrange may not appreciate the warmer lower half and the slight bass bleed.

Treble Region ​

The treble has a nice emphasis. It’s not artificial sounding up top either like some earphones out there that feign some forced resolution. What we have in the BASN ASONE is a treble that doesn’t peak-out with any unusual saw-blade type treble activity. It’s pretty even with a natural sounding slope through the upper treble. Nice extension too. The lower treble certainly sounds as though it carries the greatest emphasis in the region and uplifts the entire spectrum. I think the treble counteracts the low end very well actually. That said, it isn’t emphasized so much that it becomes offensive. At least to my ears. Just a nicely lifted treble with a little bit of bite, some crispness but overall is on the smooth and laid-back side with enough shimmer to spice things up when called upon.

Example​

Some of the test tracks I usually check out are from Billy Strings. You’ll notice that I use his songs often as his banjo play and the instrumentation that he uses is normally in rapid fire style. The song “Know It All” has a ton of treble activity and one thing I listen for is an earphone’s ability to help my brain keep track of each string pull. If it can do that then we have a nice set up top for treble activity. The ASONE quite literally rolls it’s eyes and says, “hold my beer“! Truly it catches everything, and the speed of the driver is pretty nice. Granted there are a number of BA and Planar, DD and certainly EST drivers which handle this no problem too. What I like is the treble bite I’m hearing in the ASONE. There’s an edge, a crispness at the apex of a note. I hear an overall smooth body up top with very snappy transients.

Treble Instrumentation snapshot​

The secondary harmonics of a cymbal strike don’t come across splashy and sheened-out but rather a quick decay. Violin isn’t bad at all but can come across a hint peaky, not bad though. Trumpet has a nice fullness too, with a resounding type of brassy coloration. Really nice for the asking price. Harmonica can become a bit peaky as well but for the most part I feel the ASONE nails it with the crispness it can add to a harmonica set. Electric guitar actually is kept in check which was nice to hear. Honestly, I didn’t hear anything that was brazenly and blatantly “Bad”. I think that BASN did a great job of tuning the ASONE for all types of instrumentation without killing my ears in fatigue.

Downsides to the treble region​

As far as some issues up top, I would say that treble Heads would likely want more, and those who prefer a warmer/darker sounding set will want less. You can’t make everyone happy. If anything, I could see some people wanting a bit more body up top with a more rounded note definition, but I am really stretching to find any issues. In truth the only issues would be personal and subjective likes or dislikes and not any real outright “flaws” per se. Again, nothing is for everyone.

Technicalities ​

Soundstage​

I’d say the ASONE sits around the top of the heap of similarly priced planar magnetic iems as far as soundstage goes. In truth, they all are similar. However, I do think that the ASONE has many planar sets within the price point beat in the width department. Depth of sound field is nice too as there are certainly layers in my music. I would say that height is above average as well. If I were to describe the ASONE’s soundstage in one word, I’d say “full“. The sound covers all of the listening space within my mindscape. It’s simply full. Not pushed back or outstretched, it’s more intimate than that. Also, it’s not a wall of short sound like the Timeless either. It’s obviously not a coliseum or some stadium sized venue but the ASONE creates a very satisfying psycho-acoustic image with big macro-dynamics.

Separation / Imaging ​

The question of “separation” of elements in an imaginary stage in the ASONE provided an answer which surprised me. First off, the bass is pretty big casting a warmer hue across the spectrum. A lot of the time this would also create a sort of veil on lesser quality sets. Sounds would usually mishmash together a bit. However, I found that the ASONE has very nice clarity, nice perceived speed of the driver and perceived transient swiftness which all serve as attributes that aids the ASONE in delineating and partitioning off instruments and voices. Is it perfect? No, it isn’t. Extremely congested music, bad recordings or songs that are very heavy with low-end emphasis can all trip-up the ASONE. These are rare though. Rare enough that I’d say that separation is a “pro” for this planar set.

Imaging ​

You can basically take almost everything I just said about separation and copy/paste those words here. Those same attributes that bless the ASONE’s tuning also converge to help with placement of instruments and vocals on an imaginary psycho-acoustically rendered stage. Of course, imaging and separation usually walk at least somewhat hand-in-hand with each other, but it isn’t a given. There is nice depth, maybe not class leading but it’s there and it helps with layering of sounds from front to back which coincidentally also helps with providing a good picture of an instrument and with placement on the stage.

Details ​

The ASONE is above average in detail retrieval in my mind. Of course, when playing tracks with more low-end emphasis than the ASONE will struggle a bit to render those details. For all other situations the ASONE does very well. Now, it isn’t tuned to be a technical marvel or some “detail monster”. This is a Harman tuned set that relies on musicality before anything else. The sound is a bit warmer too, it isn’t that crystal clear neutral, or dry and analytical type technical sound. Having said that, the ASONE actually presents micro details very nice with a very snappy planar driver that can move at breakneck speeds. Listening to the track “A Lens Turning” by Westerman, I heard every last little finite sound and every little bit of minutia as I was truly impressed.

Is it worth the asking price? ​

This is the real question that I have been asking over and over again to myself. I don’t think it’s clear cut. That is… is the BASN ASONE actually worth the $149 that BASN is asking? First, there are a number of very good planar magnetic iems from $100 to $200. There is the Hidizs MP145 (probably the best, review soon), the TangZu Zetian Wu, the Tangzu Heyday, Tin Hifi P1 Max, the Letshuoer S12, Letshuoer S12 Pro, 7Hz Timeless among many others (I realize I left out a lot). The ASONE would essentially have to compete and even excell past those sets where sound quality is concerned in particular. I mean, the ASONE wins out in accessories and case but that’s not as important to hobbyists. Build Quality in my opinion doesn’t stack up to the others I mentioned being all-plastic. Granted, the ASONE is built very nicely. We have all alloy builds in the MP145, Heyday, and the S12 series. However, where sound quality comes into play, my friends, the ASONE competes very well.

The Why ​

For one, the build is very nice in that it’s solid in hand and extremely light and comfortable. More so than most planar sets. If comfort comes as a priority in your listening, then I feel most will love this design. The ASONE feels very durable, very solid with a hard and dense plastic resin material. The accessories are some of the best I’ve found within the price point. That case is bonkers, and the non-mic cable looks like a good upgrade cable and is very nice. Heck, even the mic cable is very nice. However, the true reason the ASONE is worth the asking price is that the sound easily competes with any planar set that I’ve mentioned. No joke. I realize not many people have checked this set out, but it is a very fun and very clean sound, which doesn’t skimp on the details while featuring a great soundstage. Believe me, I had zero idea I’d like the ASONE as much as I do.

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Ratings (0-10)​

Note: all ratings are based upon my subjective judgment. These ratings are garnered against either similarly priced sets or with similar driver implementations or styles with the unique parameters of my choosing. In the case of the BASN ASONE ratings below, that would be $100-$200 planar iems. Please remember that “ratings” don’t tell the whole story. This leaves out nuance and a number of other qualities which make an iem what it is. A “5” is exactly average and please take into consideration the “lot” of iems these ratings are gathered against. $100 – $200 US is a small scope of iems and so seeing a 9 is easy to understand. My ratings are never the same and each set of ratings tells a different story. Each time you read one of my ratings it will be unique to that review. Basically, I create a Rating that makes sense to me.

Aesthetic ​

-Build Quality: 7.9
-Look: 9.2
-Accessories: 10.0

–Overall: 9.0

Sound Rating​

-Timbre: 9.3
-Bass: 9.8
-Midrange: 8.9
-Treble: 9.4
-Technicalities: 9.3

–Overall: 9.4

Ratings Summary:​

Not much here to really add to the conversation. The ratings are pretty cut ‘n dry for the ASONE. There is not a huge lot of Planar iems between $100 & $200 US. So even though build quality is a 7.9 it’s actually pretty good considering. How many planars are there in this price range, very few. So, receiving a 9.4 in overall sound ratings against the rest of the field is legit to me. Also, I do think the ASONE is that good. Everything else makes sense to me. A 9.8 in overall bass is in my mind absolutely correct. I don’t think there are many planars that do it better. 8.9 in midrange stands to reason because there are a couple sets which specialize in the midrange and vocal areas better. However, an 8.9 is fantastic for a Harman tuned set. So, these are subjective ratings based on the planar sets that I’ve either owned or heard of at the price point and how the ASONE compares and competes against those sets.

One more thing, I purposely did not do any comparisons as I didn’t want to run this review too long but please comment below if you’d like me to edit a comparison into this review of one of the planars in this price point. Also, comment about anything else and I’ll be happy to get back to you.

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Conclusion​

Boy was I happily surprised by the ASONE! I am actually thrilled to see what else BASN can do in the future. To think that this was their first planar and it sounds like this?! That’s crazy. Job well done BASN!! So, to conclude I want to thank the good people of BASN Audio for providing the ASONE in exchange for a full and honest review as well as a feature at Mobileaudiophile.com. BASN makes it very easy to respect this company. BASN isn’t scared to hand out review samples and aren’t worried about the subjective thoughts of reviewers which says a lot about how well BASN believes in their product. They know it’s good! They are just waiting for the rest of us to figure it out.

Other perspectives and… thank you!​

With all that said, please do not just stop at my thoughts. I write these reviews to help you and because I love writing them. Please take in other thoughts about the ASONE from other reviewers and other perspectives. As I always say, we are all different. We all don’t hear the same, we don’t all have the same music libraries, or likes and dislikes, we don’t have the same gear and sources either. Most importantly we haven’t all been down the same journey through the audio landscape. So do yourself a favor and take in other thoughts. Also, thank you for reading, it is an honor that anyone chooses to read anything that I write. Take care, stay safe and always… God Bless!

Let's start with the packed and what's inside. the box is informative telling you everything you'll need to know quickly. inside is a metal aluminum box and the IEM, inside that box is a large array of items to give you everything you need to get started enjoying the music.





The AS-one is both comfortable and provided great isolation for me. I can see these used for professional use as well as personal enjoyment. it's made well out of sturdy resin and is lightweight. While the cable quality was good, I would have loved to see a much thicker silver or copper cable included instead of two, the tips are good, and I like the inclusion of the triple flange in the box. The microphone cable works as expected and is good while out and about.

Sound:
I don't have too many planars as of yet just the PR1, i3, a few SPD IEM and had the Audeze and Monolith in the past but I do own a few planar headphones as they are my favorites. These are tuned with that Harman curve that is found to be very pleasant and rich sounding.

Bass:
Bass has that full and deep planar sound it has both control and excellent depth with texture and speed. Sub-Bass digs down deep but doesn't overpower the speedy punch of the Mid-Bass.
Mids:
Midrange presents with a warmth in the lower Mids and a brighter lift in the upper Mids, there is good body and clarity here with vocals both male and female sounding rich and positioned forward center. They sound natural and there is good instrument separation.

Treble
The highs present with good control and air, there is a decent amount of sparkle but the do roll off making them a little on the polite side and good for treble sensitive, still they are neutral and detailed.

Soundstage.
The soundstage is open and has an equal Depth and Hight with the Width being above average, it is both accurate and can handle crowded and complicated recordings well. I used these gaming on the go and it worked out well.

Afterthoughts:
The AS-one is BASNs first planar and it is a rich sounding IEM that is both fun and detailed. The accessories and the sound make it one of my new favorites.