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Ultimate Ears In-Ear Reference Monitors


Pros: Great SQ, Sound stage, Case, Customer Service, Refit, Driveablitiy... more

Cons: Some air bubbles in ciem

I wonder why UERM is often disregarded when picking from $1000 range. I'm guessing that it's due to "only" having 3 drivers, versus having 8 drivers per side. I can say with confidence that driver number does not equal sound quality(for the most part). Another reason I see why UERM might not be picked is its sound sig. It's perfectly flat. Personally, I love this. Reference sound with naturalness. Call it "the Neutrality King". 



About myself: http://www.head-fi.org/t/674373/story-of-a-new-reviewer-kimvictor


Gears used in this review: Leckerton UHA-6S.MKII, AK100, Modi, Magni, E7, GS3, Clip Zip.


Intro: UERM is a ciem that is heavily dependent on source(not amp) and recording. UERM reveals any coloration, mistakes, defects from your set up. That being said, having a good source and high quality music is highly recommended. The best I've heard is AK100+Leckerton with MQS music.


Amping/Source: As I mentioned, UERM is heavily dependent on source. With a bassy source, they are bassy. With a bright source, they are bright. That being said, it is good to have a neutral source. They also have to have a weird impedance curve, causing them to be hard to drive. Now, they might be loud without an amp, but the sound sig changes without a good amp. Also, UERM is sensitive to impedance, so I recommend using a source with less than 3ohms. With AK100(22ohm), the UERM looses treble. An amp may be used to negate the high impedance though.


Here is my break down: UERM is almost totally flat.

Sub-bass: Very very good. Great extension and presence. Bass is very deep and powerful. Speed is great as well. This is the kind of bass you would want.

Mid-bass: Flat. This is the part that people like emphasis on, but there is no emphasis. It's present and punchy imo. The bass is again, speedy. It leaves good sense of speed.

Lower-mid: I don't listen to many musics with lower mids, but they have good clarity and detail.

Upper-mid: Very clean, detailed, emotional.

Lower treble: It can be little harsh, but not as harsh as SRH940. It's not rolled off, and is clean, airy, and detailed.

Upper treble: Superb extension with sense of air and detail.

Clarity: Best I've heard yet.

Detail: Best I've heard.

Sound stage: They are the best IEM when it comes to soundstage. I recently noticed that they are actually wider than SRH940, a full sized closed back.

Naturalness: UERM is a kind of ciem that sounds "real". Some argue that colored phones sound more natural and organic, but UERM sounds very real.

Imaging: Ridiculous. In a good way of course. Very impressive. They are better than most headphones. Similar to HD800.

Sibilance: It it less sibilant than SE535 and SRH940, but it is still present. I don't mind it so much, but it's worth nothing.


Now, other things:

Customer Service: As soon as my impression arrived, they emailed me with all the infos. I asked them many questions, and they were all answered. They gave me a completion date, and that date was kept.

Refit: My right side didn't fit, so I sent it off for a refit. They didn't even need a new impression. I described what part didn't fit, and they fixed it. They even upgraded shipping back to 2 day air for free. Very satisfied.

Packaging: I love the case. It's so much smarter than Westone Case I bought. It'd be nice if it was air tight though. 

Cable: Cable is good. It's bit thicker than normal custom cables, but is still thin and very supple.


My story: UERM wasn't even on my list when I was first planning to buy a CIEM. During a short visit I had in HK, I visited Jaben and demoed many CIEMs. I tried JH13, JH16, Fitear Universals, Westone ES5, but I didn't like any of them. Fitears were too expensive and bit too bassy while JH13 didn't have mids that I was looking for. From there, I was about to purchase a Miracle, but I was unsure because people told me about recessed mids. Therefore, I looked at where I haven't. I disregarded UERM because it had 3 drivers, but still pulled a trigger on it. Now, I am very happy about it.




On the other hand: Are the UERM worth it over universals?

Answer to that question may vary from person to person, iem to iem, but my answer is yes. I haven't heard all the universal iems in the world, but my general thought is, for the price, no universal iem is going to beat the UERM. 

Here is my rating on some universal iems. (Don't take this personally. This is all imo.)

1. K3003: If I was to buy a universal, this would be it. This is the only iem that came close to UERM.

2. TG334

3. W4

4. IE800

5. UE900/EX1000

6. SE535/Triple fi/EX7550/H-200

7. IE80

There are more, but that gives you a sense of how highly I praise the UERM.


On the other hand 2: How does UERM perform against other CIEM(similarly priced, of course)

I say that it's a matter of taste. Although I've only heard demo version of other ciems, I felt like UERM, JH13, and ES5 all had similar technical capabilities. JH13 was more sub bassy, which made them great for pop, UERM was neutral and wide, making them great for classical and acoustic, and ES5 was mid centric, making them good for rock and classical. Considering that I'm an mid/treble head that hates bass(I don't enjoy having strong mid bass), UERM was a clear choice.


Updated again with source/amp section.8/10/13

Please ask any questions if you have any.


Update: 9/20/13

Still loving them! The soundstage is better than I thought. Wider than SRH940. What strikes me every time is the micro details. They are so detailed without being unnatural. They pair really well with AK100(optical out)->Leckerton UHA-6S.MKII


Pros: Everything but the bass

Cons: You can't hear a thing below 70hz ....

Received the UE RM 3 days ago, the quality is good, the customers service was perfect and it's an overall good product.

The audio is really precise, the ear 'fit' is great (you're always scared that it won't be super confortable since it's custom for you ears), and everything is nice except ...

There are absolutely no sub frequencies ! For so called "reference monitors" I was expecting a real correct 20hz - 20khz frequency range, but you can say good bye to the bass !
I guess it's not a big issue for rock lovers but if you want to listen to any other music genre (electronic, hip hop, pop, etc.) you won't have any low end ! So you can forget the mix aspect ...

Had to test with my Ultrasone pro 900 (headphone) and the difference is crazy, you just have no low end with the ultimate ears ! Bascially they're like a Beyer DT 880 pro but in-ear ... 


Pros: Unbeatable sound stage and clarity

Cons: for $1000? None.

Alright everyone. I feel like the UERM's deserve some cred. I never write reviews on my phones, and I know not enough people read this section, but someone has to defend these.


I've owned and listened to many of the top tier Custom's and Universal IEMS.







Earsonics SM3

Shure SE535

Sennheiser IE8 | IE80

CK 100

CK 10








UM Miracles

Everything under UE

UE 900

AKG k3003i



okay too many. Not even going to write it all down. But the point is, I've heard a lot. If you want neutral sound with great detail and clarity, with hands down the best sound stage out of any IEM I have ever heard (by a mile) UERM's are the way to go. 3 drivers I know. But you don't need 8 to make something amazing. One thing I have noticed was that something with more drivers do tend to perform better with better amp, etc. The UERMs are my go to. I plug straight into my iphone 5 and go. This was the earphone that made me sell everything else. (except for the SM3's and a few other uiem's I keep around for backup).


If you happen to run into UE at a meet or a tradeshow, they'll have some promotions you can capitalize on. Either way, go get them if you are serious about listening. I have bigger cans and other phones I always listen to, but I know I'll never net these go. They are just that good. Even the folks I had bought the JH 16 from, or the ES5 from, also said they kept their UERM's and are selling the rest.


I didn't believe them at first. It's exactly what I did a year later when I got my UERM's done by UE. Yes sometimes I wish I had a little more bass. Yes, sometimes I wish there was a bit more detail in the bass (stuff that JH 16 really excelled at) but still, the balance in performance here is great. Does wonders in just about every category of music.


Keep in mind that at this stage, it's all about preference and the specific sound track you are listening to. The other phones aren inferior or anything, it's just for me, the UERM's mold themselves better to what I listen to. The soundstage however, is clearly better. No Debate there.





Pros: Mid range and great soundstage for an in-ear.

Cons: Customs take some getting used to. Bass suffers a little.

I've recently amended this review, based on my education into the world of Head-Fi.


I've been toying around with getting a set of in-ear customs for a long time.  I caught the write-ups in my audio rags about UE's new product and jumped all over them.


I'm a video editor, but I also do a lot of music and mixing, writing, directing, and anything else that has to do with entertainment production.  It's like UE decided to custom build a pair of in-ear headphones just for me.  Thanks guys, much appreciated.


My super-secret hope?  They'd make for pretty good listening, too. 


I don't have any experience with IE custom monitors prior to this.  I've had about every model of universal buds Shure ever made-- and my favorite pair prior were the e4Cs.  I had the e5's but they hurt the ear after an hour or so.  The I owned one pair of UE's in the past, and was disappointed in their construction.  They were pretty much toast within a year-- but they were low-grade consumer models.


No worries with the UERM's.  These things are built well.  I opted for translucent black.  Something about clear and in-ear made me think of gross ear wax I never wanted to face.  The black is pretty striking.  I also did double Capitol logos on the ears.   


The customs take some getting used to.  Mine hurt at first.  After a week things chilled out.  There was a time I considered taking them back for a re-fit, but I stuck it out.   


Sound quality-- well that's what these are all about- and they do sound fantastic.  I would call the soundstage very good-- but not up to the level of a quality over-ear open headphone.  Brilliant highs.  That's where these really shine.  I notice transients-- particularly in passages with great natural reverb.  Open and extended.  


The one common criticism I ran into about this model was the lack of bass.  They certainly can't stand up to the LCDs or HD-650 or HD-800.  And they don't go as deep as Dr. Dre Beats.  But where Beats have a thumping quality suited for pop music, the bass overpowers on everything else.  The IERMs bass is extremely tight.  What they lack in deep low end they make up with in bass detail.  A little EQ will bring the lows in, but the detail in the bass is where these shine. You can sort of hear the skins on the drums stretching and retreating.  You can hear the fingers slip across the bass strings.  They're just ridiculously accurate-- almost comically so.  But in reference listening you don't want that deep extension there when you're trying to figure out what you're listening to.  


You might get the sense that I like these by now...  Indeed.


I knock the design a bit, because-- let's face it-- there's nothing sexy about the shape of your ear canal.  But the box they come in is smashing-- and has my name printed on it-- but the buds have a hard time fitting inside, so I bought a Pelican case.  It's waterproof anyway-- a good way to protect my thousand dollar investment.  


My and my UE's are going to be married for a long time.  






Pros: Listen to the music, not the IEMs

Cons: Case is not pocketable

My 1st Customs.  I've owned, Coppers, Golds, Shure 530s, IE8s (2 sets), among others stuff.  All of the universals I've owned were a hobby.  I would play with tips, I would mess with the EQ, I would listen to different IEMs based on the music.


Not bass heavy, but also not bass light.  It makes whatever bass is on the recording.


Now that I own these, I don't use anything else.  I never even think about them.  The music is just pure joy.  I can't recommend these more highly.  They are one of the best purchases I have ever made.  Oddly enough, I think at $1000, they are a better value than my universals at $300.




Pros: Balanced sound from top to bottom, never stressed or pressurized sounding. Effortless sound, realistic imaging, adapts into different genres.

Cons: None that I can think of.

Ok so I realize the UE IERM's are kinda old news now, but I ordered a pair a few weeks ago and just got them today.  All I can say so far is, the sound is exactly what I want from an IEM.  


I have been a bit of a bass head in the past, and oddly enough still think of myself as one, but apparently that's not the case anymore, because these sound just perfect to my ears.  The treble is nicely extended, yet seemingly neutral.  I have noticed that the treble can sound just a tad and by "tad" I mean <5% harsh sometimes but I am very confident this is due to the recording and not a fault of the earphones by any means.  


Mids are nice, present, not forward, not back.  


Also the part I was most worried about, the Bass seems just right to me.  Lately I've noticed when listening to things with my grados or UE-900s that the bass was either too light which gave emphasis to the treble or the bass seemed just a touch compressed (forced?) over pressurized in the UE-900s which led to this slight muffling of the treble extension.  Possibly due to the fact that these are customs, but regardless the bass sound perfect to me in the IERM.  Direct, punchy, but never getting in the way of anything else.


All in all I'm glad I went with my gut on this one and didn't follow all the reviews that suggested the JH-16s because "I like bass"  


Also huge thanks to UE and their team that got the fit exactly perfect the first time.






I'll have to upload some pictures too but I find these have quite a bit more bass than I was expecting them to have, based on what everybody was been saying.  This is a good thing because I was actually expecting them to be a bit bass light.  


I am curious to see if UE has perhaps done some retuning of the UERMs since the first models.  Based on other pictures the sound tube for bass is significantly smaller than the tube for mids and treble, whereas on mine they're almost the same size, close enough that I have to look at the drivers to tell which hole leads to which.  If this is true and this is kind of a "revised" version, I'd be curious to see if anybody else has noticed this on a recent order.  I will say I hear very very deep bass extension in these and by that I mean very very deep sub bass vibrations in the background of songs that I've never heard before, even compared to the HD650s on my Anedio D1.  


Now I realize comparing a $1k IEM to a $500 full-size headphone is kind of apples and oranges (fresh picked apples and wal-mart oranges?)  Either way, the more I listen to these and compare them to other equipment I have on hand, the more satisfied I am with them.  They sound perfectly flat to me with the D1, (I don't really notice the bass roll off that everybody else mentions at all except the slight roll off as it transitions out of human hearing range approaching 5hz)  Also, I feel like these are the most "real" sounding headphones I've heard in a long time.  It's no longer an issue of "good bass" "good mids" "good treble" etc. etc.  


The resolving power/imaging/soundstage/instrument separation all sound very realistic to me.  So much so that some recordings approach that "virtual live concert" kind of feel, mostly due to the additional extraction of what I like to refer to as "micro details."  By that I mean details not from the instruments and vocalists, but the kind of auxiliary sounds, tiny little reverberations off walls, resonance of drums at rest from nearby instruments, etc.  I think I could tell the difference between a taylor and martin guitar, and probably the difference between light and medium gauge strings, assuming they're recorded in a similar fashion.


To sum things up, based on my impressions over the first few days, I'd say these lie exactly in the middle of everything to my ears.  

Not too bright, not too warm.  

Not too forward, not too distant.  

Also in terms of their analytical nature, I'd say they sound right in the middle between too cohesive and too separated.  You can easily hear every instrument, singer, but at the same time I don't feel like the UERM is prying apart the music to an artificially analytical level.


I realize this has been said many times before, but since the frequency response is so flat in these, they almost seem to change their character depending on the type of music you're listening to.  I always play my music with no EQ on foobar using WASAPI or on my laptop with bitperfect.  


Earlier I had listened to DJ Billy-E's Beats 4 My Van, as rudimentary as this song is, it does a great job of evaluating a headphone's bass characteristics, resonance/decay etc.  I'll have to say that the bass was at least if not more powerful sounding in this song as it is using my Sennheisers, indicating to me that the UERMs are not bass light by any means.  This song sounded very boomy, club subwoofer like, which is what I anticipate the audio engineer's intention was.   I quickly transitioned into Ludovico Einaudi's Le Onde still with EQ disabled and instantly the UERMs shifted into a nice crisp piano sound, with absolutely 0 change in settings from me.  


Something that has stood out to me in particular with these IEMs is their ability to replicate a piano's sound, dynamics and dimensionality.  As a pianist myself, I spend a lot of time playing different pianos, and while I realize all pianos sound different depending on their type and size, I have grown quite familiar with what a piano should and shouldn't sound like in a recording.  No matter how hard I try, pianos never seem to sound right from my triple.fi 10s, grados, UE-900s.  The universal UEs have this slight bass compression, which makes the upper register of a piano sound like it's coming from a speaker, very flat and 2D.  The grados on the other hand can never seem to capture the lower register.  The individual notes sound fine in and of themselves, but on a piano you never just hear one note, the harmonics should ring through the entire instrument.  So far the UERMs capture both the upper and lower registers of the piano more completely and realistically than anything else I've listened to.


I'll continue switching around source equipment and listening for any glaring flaws but so far I have yet to find any.  All of the things I mentioned above seem to add up to create something greater than the sum of the parts, in that they all combine to give an added layer of realism I don't think I've ever heard before.


Pros: Simply stellar sweet sound

Cons: Hyper revealing to bad sources / tracks

Given the date of the OP's review, seems I'm a couple years late to the UERM party.  Well, let's keep it going then.  

My new ears have arrived, and they sound glorious.

A few months back I made the happy mistake (happy to ears, misery to wallet) of researching a replacement for my UE10s.  Back in the day, when I got 'em, I chose the 10's over the 11's specifically due to the former's neutrality.  
The UE11 to me, was excessively forward and boomy, and I figured they'd be fatiguing in long listening sessions.  I demo'd both models at the LA Airport CanJam, ordered on site, and have loved the UE10 ever since.
Technology has taken quite the jump since then.
Compared to the UE10s, the UERMs have more sparkle, more life, more vocal ring, more black background, more air between the notes, faster attack and decay.  
I've read the criticisms of the UERMs being "bass-lite", and don't entirely agree.  First, I'm powering them with Centrance's 1.5W M8, balanced dual 3-pin XLR.  The UERM craves power (as did its older sibling) and has fantastic synergy with the M8.
Given this power, the UERM has no problem reaching low.  But the lows hit hard and fast and withdraw equally fast.  It's more of a "thoom!" vs a "thoooom..."
Other reviewers have stated that the treble can be harsh.  This I will agree with, but the harshness to me seems to be very much linked to the quality of the track.  
Stellar recordings like "Best Audiophile Voices" or Sarah Darling's acoustic tracks on "Angels & Devils" sound just incredible.  Soaring highs, sweet sweet vocals, with no harsh edges.
Lots and lots of pop, and other poorly recorded tracks, however, sound just awful.  ugh.  The UERMs reward you with the good and punish you with the bad.
Many thanks and props to Mike Dias and Roy Cochran.  Mike was my very patient and cool dude UE contact who answered all my product questions and ultimately connected me with Roy, for my local demo in San Diego.  Mike's first description of the UERM was that "it's the 10, just better".  The UERM is exactly that, and embodies my preferred sound style.
The UERM's sound just sounds... right to me.  That "back of mind" sound critic, always listening for flaws, is quiet.  I love this sound and listen with deep content and satisfaction. 
My audiologist done good - the fit / seal is solid, a tiny bit tight, but it's a well distributed fit.  I don't feel any pokey parts.
It comes in a hefty, not small metal case, much better than the flimsy, soft aluminum-like holder that came with the UE10s, so I'm pleased about this.  The fit and finish, and "out of box" experience is exactly what I'd expect from a premium product.
All in all, this has been an ideal purchase experience from pre-sales questions to demos, ordering, customization, follow ups and obviously end product quality.  These guys are pros.   
Lastly, the custom balanced cable is from Headphone Lounge.  Ted does damn fine work. 




Pros: Great sound, ambient noise isolation, comfort and cool looking

Cons: are you kidding? wait... hm.... $$$$

this is my first set of customs, so I can't compare it to other customs. but comparing to a set of TF10, there is no comparison.

First, it's very comfortable. with TF10, my ears hurt after an hour or so of listening. but with RM, long listening is no longer an issue. I only put them down to take a break and rest my ears. of course, wearing them on/off is much more difficult, but I'm getting the hang of it.

Second, the ambient noise isolation is much better. I was surprised by the fit and the consequent isolation. it seals for good tight bass and block outside noise.

Third, it sounds awesome. the little details are brought forward. It's flat. no coloration whatsoever. I mix live music so this is perfect for me. i love flat sound: direct from the source without any coloration. if you're a bass head, then you should look elsewhere.

all in all, this is my new best earphones...

i waited six years to get a pair of customs... the wait was worth it.


Pros: Great sound and isolation.

Cons: The earphones are kind of expensive.

Ultimate Ears is a very good headphone company. They have a wide variety of headphones, that range from the type you use with Ipod's and mp3 players to headphones for live performances. Big time bands that use these headphones are Anberlin, Rise Against, Switchfoot, and many more. I love the sound quality and the isolation from other sounds. The headphones range anywhere from 20 dollars to 1300 dollars, I love them. I have the 1300 dollar ones. This is a great buy.


Pros: Flat and accurate yet not too clinical

Cons: UE customer support isn't the greatest

I'm a laptop producer of electronic music and film score compositions and it just isn't practical to remain tethered to a desk with near-field monitors for tracking and mixing. I need to be mobile but need to know that what I'm hearing will translate accurately to my mixes.

The UERM's allow me to mix with confidence. Everything is clear and well-placed. The bass is exactly right, which is often the most difficult part of a mix. What I hear in my monitors is what I get when I play back on other systems. The separation of instruments and depth of field is really impressive for an IEM. Isolation is quite good - I'm often on a loud train or boat and I can mix without ambient noise distracting me.

I listen to these every day during my commute and they excel at electronic, jazz and pop but since they are engineered to have a flat response the mid and low bass can feel restrained with aggressive rock or hip hop. I may pick up a set of UE 18's for my recreational listening.

Overall I'm really happy with the UERM's and highly recommend them for audiophiles and producers who appreciate an accurate representation of the source material. The fit wasn't perfect the first time so I had to send them back for an adjustment on the right side. The left side fit like a glove from day one. The hard acrylic takes a little getting used to but now it feels just fine. I'd like to try these with a silicone option at some point, both for comfort and increased isolation.

These absolutely require a full burn-in. They sounded awful at first and after about 20 hours they opened up and the veil was lifted. I was so relieved because I didn't realize that IEM's needed as much burn-in as full sized phones.
Ultimate Ears In-Ear Reference Monitors

The Ultimate Ears In-Ear Reference Monitors are designed for professional studio engineers and producers for use during recording, mixing and mastering original music content. Other applications include FOH venue tuning, live recording and mixing. This is also an excellent product for “audiophile” or serious music listener because of its natural and authentic sound reproduction. The Ultimate Ears In-Ear Reference Monitors are an industry first and are a combination of the Ultimate Ears pro audio sound along with a flat frequency response curve that has been developed & tuned in collaboration with the historic and widely respected Capitol Studios engineering team. The Ultimate Ears In-Ear Reference Monitors allow the user to record, mix and master anywhere, anytime because they provide up to -32 dB of noise isolation. Once the product is inserted in the user’s ears, the user is always in the “sweet spot” no matter where they are. This is because the music is being reproduced and delivered directly from the source into one’s ears. Since they are noise isolating, there is no need to be concerned with environmental acoustics and noise. Lightweight and portable, they can be used as an honest base line reference source when recording and mixing in unfamiliar venues. In addition, they can be used on an airplane, in the waiting room or anywhere you can find time to work! If you demand nothing but the best for recording mixing or mastering, the Ultimate Ears In-Ear Reference Monitors provide the comfort, quality and sound that our professional artists and engineers have come to expect since 1995. They combine a new proprietary design featuring three balanced armature speakers. Other new technology includes a rugged low profile, low distortion cable, dual acoustically tuned sound channels and multiple passive crossover points creating the ultimate in separation, detail and clarity. Our standard color and art work for this product is an opaque black faceplate, with a clear back housing. The standard art work features the Capitol Studios logo on the right monitor and the Ultimate Ears logo on the left monitor (see photo above). If you want to choose your own art work, we of course offer a variety of shell colors that can be personalized with individual artwork. Visit our custom art gallery for inspiration. Please contact one of our trained specialists at (800) 589-6531 if you are interested in personalizing your Ultimate Ears. 1234Ultimate Ears Mid and high frequency drivers Low frequency driver (woofer) Acoustic Filters Electrical tuning – Passive filtering (multiple crossovers) Sound Quality Inside each custom in-ear reference monitor you'll find three proprietary balanced armature speakers featuring a flat response curve that was developed & tuned in collaboration with Capitol Studios. These in-ear monitors are specifically designed for professional recording, mixing and mastering. The Ultimate Ears In-Ears Reference Monitors are the result years of combined pro audio experience between these two industry leaders. The flat frequency response is consistent, natural and revealing creating an accurate base line of pro audio reproduction that can be trusted by the professional recording engineer & producer no matter the environment. It also allows the engineer and producer to use a single mix that is consistent across many formats. The Ultimate Ears In-Ear Reference Monitors stay true to the Ultimate Ears sound heritage and take advantage of the many years of in-ear technology advances that are unique to Ultimate Ears. Passive crossover technology electrically tunes and separates sound frequencies resulting in clarity and detail. The low mid and high frequencies are kept from masking or bleeding into each other. The results are defined and authentic highs, clean & natural vocals and instruments in the mid range and a visceral & powerful low end. In addition, two separate acoustically tuned sound channels keep frequencies separate and balanced until they are delivered to the ear where they blend naturally. Like all our other custom in-ear monitors, they're compatible with wireless transmission systems and portable media devices. Our Ultimate Ears In-Ear Reference Monitors provide up to -32 dB* of noise isolation and passive noise cancellation (* ask about our new soft silicone material option). Warranty: 1-year limited hardware warranty. Included Accessories Cleaning Tool Tool for easy cleaning. Engraved Carrying Case Personally engraved black metallic carrying case that protects your Custom In-Ear Monitors. Dimensions: Length 4.50" x Width 6.25" x Height 1.50" Specifications Input Sensitivity: 98 dB SPL @ 1 kHz Efficiency: 112 dB SPL @ 1 kHz, 1mW Frequency Response: 5 Hz to 20,000 Hz Impedance: 35 Ohms @ 1 kHz Internal Speaker Configuration: Three balanced, precision armatures (woofer, mid driver & tweeter) Noise Isolation: -26 dB (100% acrylic housing) and -32 dB (soft silicone material option) Input Connector: 1/4" jack adapter gold plated; 3 pole 1/8" (3.5 mm) standard jack

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