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[REVIEW] HifiMan RE272 – the Purist

post #1 of 110
Thread Starter 
First, I like to thank HifiMan for the sample. I have had the RE272 for a while now but writing this review doesn’t become easier with time. There is something incredible about RE272’s sound but at the same time, there is also something hard to describe that is holding me back from an unreserved recommendation. This is more apparent if we were to compare RE272 to its elder brother, the very smooth and musical RE262. RE262 makes music comes to life like magic, but RE272 is much more technical and raw. It is perhaps that rawness that I have reservation for – No, I am not saying RE272 is inferior when compared to RE262. In fact, I think RE272 is better technically. However it comes with the cost of musicality, especial when driven from most common sources (i.e. iPod and such, even with portable amp). To really squeeze out a 100% from RE272, I truly believe you will need the right synergy to smooth out the rawness of RE272’s presentation and makes it really sounds effortless. That is, at least from my point of view, RE272 should be driven with a balanced amp. We will discuss this further in the Sound Quality section. For now, let’s focus back on the review.

RE272-01.jpg

RE272-02.jpg

Spec
Driver: 9 mm Dynamic
Impedance: 20 Ohm
Sensitivity: 103 dB
Frequency Response: 15 Hz to 22K Hz

Packaging, Accessories and Build Quality
Packaging is never quite the game for HifiMan’s IEM. But with the RE272, it is quite a looker - at least in a geeky audiophile way. I think the box that house the RE272 is best described as the miniature version of the box for HifiMan flagship DAP, the HM801. It is great looking of course, and equally good for long term storage, but not quite portable if you need it to be. The solution? Just gets a hard case from eBay for less than $5 and you are all set.

RE272-03.jpg

Accessories wise, it is fairly standard for the RE series. You will get some spare filters, a shirt clip, three pairs of single flange eartips, a pair of big bi-flange and a pair of small bi-flange. What not so standard are the three extra extension cables. RE272 has a two-pieces cable design – the earpieces to the stereo plug is only about 75cm, while the extension cable is around 70cm. This adds to a total of 145cm. The reason to use a two-pieces cable design is HifiMan’s solution to avoid the extra adapter needed for the TRRS balanced plug used on RE272 (plus RE262 and RE-ZERO). The extension cable itself acts as the adapters, and all you need to do is to use the right extension cable for the jobs. One cable is for normal stereo source; another one is for balanced TRRS source (such as the HM801 with balanced amp module); the last one is the reversed normal plug – this is for those of you who want to wear the RE272 upside-down for over-the-ear style and don’t feel like listening to the wrong channel (right for left / left for right). This is really a smart and elegant move for HifiMan to address all the problems related to its earlier models with the TRRS plug and wearing style by simply giving the user their own choice of cable.

RE272-04.jpg
The different cable that allows RE272 to be used with balanced and single-end output.

Build quality wise, I think the RE272 is fairly solid. It is no secret that HifiMan old models are never quite stable on build quality. I have had my old RE0 for over 3 years now and it is still working fine (though I did recable it recently as the old cable has begun to harden after so many years of regular use). But on occasion you do find people complain about housing split on some batches due to weak glue issue. The new housing used on RE262 / RE272 is supposed to address this problem. It adds a rubber ring to hold the housing together and as far as I can tell, it is doing its job well. The difference between RE262 and RE272 housing is only on the outer finish. RE272 has a glossy finish that makes it look metallic in photo, but it is actual just plastic like RE262. As for cable, it is similar to that of the RE262 – thick but soft, and by far the best cable since the very first RE model.

Overall RE272 looks well build and well packed. For $250, I don’t think you can quite compare it to the name brand out there. But I have listened and reviewed the HifiMan IEM since their very first model back in 2008 and I can honestly say it is an evolution for both the company and its user. While it might not look quite as expensive as its price tag, it sure does sound expensive. HifiMan is never really a mainstream brand and it will likely to stay that way for now. While it does have its share of disadvantages as a small brand / outfit, there is no denying that HifiMan has earned its reputation as an audiophile orientated company in an extremely competitive market.

RE272-06.jpg
RE262 (left) vs. RE272 (right).

Sound Quality
The IEM has been given no less than 50 hours of burn-in before the auditioning. No significant change was detected after the burn-in.

The overall sound signature of RE272 is best described as the continuation and perfection of RE0, but it is not a simple ‘bettered-RE0’ at the same time. That is, those who love their RE0 might not immediately get what RE272 is about at the first listen, at least not without the right setup. While HifiMan has made a point in their RE272’s ads about its easy drivability of 20 ohm impedance and 103dB sensitivity, it will be foolish to ignore the potential of amping – perhaps ‘amping’ is the wrong word here. What I really meant to say is the potential of RE272 being balanced driven. Taking RE0 as an example – it is perfectly fine sounding without extra amping. But if you pair it with a decent amp, it will shine. Another example will be Etymotic ER4P – fine sounding by its own but transformed with a 75ohm adapter to the even better sounding ER4S. For RE272, amping is less important than how it is driven. But once you pair with it with a balanced source or amp, it will shine as well – and more so than any universal IEM that I have listened in a balanced or semi-balanced setup (via Meier Audio Corda StepDance and the Active Balanced Ground inside it). This however shouldn’t be too much of a surprise. After all, RE272 is tuned with balanced source in mind (*via HifiMan’s own HM801 with balanced amp module).

When not driven in balanced mode, RE272 has a sort of mid centric flavor in its overall neutral and analytical presentation. The vocal seems to have just a little more energy when compared to the rest of the spectrum. Bass is quick but quantitatively small. More importantly, the deepest end seems to be missing which causes the lower end texture to be lacking (or should I say ‘mildly decent’) – which is not something uncommon for most analytical sounding IEM and certain a trait shared by both RE0 and ER4P/S. The overly fast speed and short decay that make them good analytical IEM in the first place are often a curse for good texture. Being among the best analytical IEM in the market, RE272’detail retrieval can easily match up to Etymotic ER4S with treble extension that is almost as good as RE0 and soundstage much wider than both. If it is not for the slight mid forwardness that tends to hinder the overall clarity, it would have been the most impressive analytical IEM I have ever heard without the need of extra amping – and perhaps in many ways, it is really impressive as it is. However, the story of RE272 doesn’t quite end with that. There is something more to discover.

When I first plug RE272 into HM801 (with the balanced amp module installed), I know I am listening to a very special IEM. To be fair, I have listened to StepDance for a while now (which Active Balanced Ground provides similar effect as a true balanced setup) and the most IEM don’t seem to take the full advantage of it. Yes, they all sound better with StepDance, but they all sound really good on Meier Audio previous generation Corda 3MOVE as well – and I can’t say Stepdance is taking them to the next level. Well, not till RE272. Both (balanced) HM801 and StepDance do one incredible thing to RE272. They make RE272 sounds effortless, like taking an invisible barrier away from RE272 and expend the dynamic to multi-dimensions. Everything sounds more refined and layered, and most importantly, the slight mid forwardness is gone and the bass begins to show texture and depth. It is analytical but not excessively bright, warm yet remains mostly neutral, extends from one end of the frequency to another end without sounding lacking or overly done in any particular area, and has an impressive soundstage that isn't common to the analytical sound signature. It is as close to a perfect equilibrium as I can imagine, if there is such a thing in the IEM world.

Now, let’s take a step back. A 2StepDance (*StepDance successor) is almost $400; a HM801 with balanced amp module is over $1k. Neither is cheap option and certainly doesn’t make sense to buy a StepDance or HM801 just to pair it with RE272. The reverse however makes a lot of sense. If you already own either one of the two and are considering one of them, then RE272 makes a rather good choice for an incredible sounding universal IEM. For a less expensive option, the new iBasso T5 also pairs really well with RE272. Though not quite as good as balanced HM801 or StepDance, T5’s BTL grounding is still managed to deliver great result with RE272. It hasn’t driven it quite to the ‘effortless’ level, but still leap ahead of other sub$-200 portable amp I have tried as far as the whole synergy of the setup is concerned.

For those who prefer to listen to their IEM without a portable amp, don’t feel despaired. Even without a balanced setup, RE272 is still a great analytical IEM on its own. It is just the audiophile in me that wants me to believe balanced RE272 is what it supposed to sound like – and it is hard for me to go back to a regular setup once I have heard how good RE272 can be. Much like it is hard for me to listen to RE0 unamped or listen to ER4P when I can convert it to ER4S. It is a choice to get the best out of the rig regardless of cost, even if it is only for the last few %.

RE272-05.jpg

Verdict
I have a strong feeling that RE272 is the one IEM made for the purist – the technical listener who is obsessed with accuracy and detail. This is very much different from RE262 where it melts people’s heart with its smooth and musical presentation. Priced at $250, RE272 is $100 more expensive than RE262 and definitely not quite as attractive price wise. It does however belong to the top-tier group and arguably the best among universal IEM when paired with the right setup. While it won’t win award in the bang-for-buck category, it certainly doesn’t lack value either. For those who own a balanced setup or looking to own one, I’ll recommend RE272 as one of the ‘must try’ to showcase just how good the setup can be.

Check out the Consie Multi-IEM Comparison in my sig. for a quick sum-up
Edited by ClieOS - 12/27/11 at 11:46pm
post #2 of 110

As always, great review, and interesting perspective about the balanced output improving the RE272 greatly. Looks like you're starting to make your way down your review list again!

post #3 of 110
Thread Starter 

My farther was sick back in November which pretty much stopped me from writing review as I were traveling between two countries and between hospitals for week at a times to take care of him. Luckily it wasn't as bad as we thought but the road to full recovery is still long. Anyway, I am in the catch-up mode right now and hopefully I can finish up the stack by next month.

post #4 of 110

Hope your father is doing better and recovering well now.

 

I was waiting a very long time for this review. But, I somehow had the feeling that it's going to be top-rated and would be the first review after the long break. Great review!

 

Your review makes me want to spend that $400 on 2SD though wink.gif

post #5 of 110
Thread Starter 

Thanks.

 

I want a 2SD myself if not for the fact that it doesn't quite make sense to own both generation of StepDance. So instead I took the risk with T5 because of its size and BTL grounding and it turns out to be quite good as well.

post #6 of 110

Many thanks for this good review, I have recommended yesterday the 262 to a friend, I will also send to him the link to this review.

I hope your father recover the health soon.

post #7 of 110

Great review. I found that the bass became more pronounced with time and RE272 lost the excess harshness at the top end.


Edited by psygeist - 12/27/11 at 4:54am
post #8 of 110

Very nice review.

post #9 of 110

Very nice review, clieOS.

 

Firstly I wish your father a speedy recovery mate. I lost my father recently after a lengthy ilness, so I know its not easy for you...

Now thanks for that review on what look like some real special IEM's. But you are right in that they are for special set-up to be able to get there best.

 The fact that both 262 & 272 have the TRRS optional balanced cable ad-on for going balanced explains where really HiFiman are going with these IEM'S. Also why they recently added the balanced amp option on their HM-801.

I have also read  how good the 262 sounds balanced.  I really would love to go balanced one day myself.  Also can see myself getting both these IEM'S.

This Journey never ends really, always something that captures our attention. Again well written review clieOS, you certainly are quite an Authority in the IEM world, now you have me salivating .....again

post #10 of 110

very nice again! i was looking fwd for this and enjoyed reading this review!

(un)fortunately it helped to make my mind not to get the RE272

 

what i didnt get is , how is the treble compared to the RE0...

 

post #11 of 110
Thread Starter 
Quote:
Originally Posted by kanuka View Post

what i didnt get is , how is the treble compared to the RE0...

Extension is almost on par, but RE0 sounds crispier as it has more energy on treble than rest of the frequency. With RE272, the presentation is more even out and treble doesn't stick out on its own, Just to note, I am referring to balanced or StepDance amped RE-272, not single-ended.

post #12 of 110
Quote:
Originally Posted by ClieOS View Post



Quote:
Originally Posted by kanuka View Post

what i didnt get is , how is the treble compared to the RE0...

Extension is almost on par, but RE0 sounds crispier as it has more energy on treble than rest of the frequency. With RE272, the presentation is more even out and treble doesn't stick out on its own, Just to note, I am referring to balanced or StepDance amped RE-272, not single-ended.

yea, my question was when well-powered. but did you compared it with an amped Re0 ?

 

still, i'm surprised that the Re0 treble still holds its ground against so many iems even much more pricer. no wonder i liked it so much
 

 


Edited by kanuka - 12/27/11 at 11:14am
post #13 of 110

What about bass slam?

 

And my most-important criteria (somewhat related to bass slam): PRAT (pace, rhythm, timing, dynamics ... IOW, the tap-your-feet/fingers response). How  PRATy is this model -- compare/contrast to others, pls.

post #14 of 110
Thread Starter 
Quote:
Originally Posted by kanuka View Post

yea, my question was when well-powered. but did you compared it with an amped Re0 ?

 

still, i'm surprised that the Re0 treble still holds its ground against so many iems even much more pricer. no wonder i liked it so much
 

 


That's because RE0 has some of the best treble extension I have heard on any IEM, and it is very delicate (only surpassed by ER4S and matched by Phonak). For me, an unamped RE272 doesn't quite as delicate, refined, or as layered as RE0 in the treble department mostly because RE272's upper mid sticks out more (the information is still there, just not in the front). But once balanced amped, RE272 becomes much better on bringing out all the delicate detail, even more than RE0.

 


 

Quote:
Originally Posted by alphaman View Post

What about bass slam?

 

And my most-important criteria (somewhat related to bass slam): PRAT (pace, rhythm, timing, dynamics ... IOW, the tap-your-feet/fingers response). How  PRATy is this model -- compare/contrast to others, pls.

Bass slam (again, balanced amped) is actually pretty good, but it is not the best PRATy IEM I have ever heard. The best part about (balanced) RE272 is how deep the bass note goes, along with a very decent texture. But it is still relative lean in quantity especially if you are comparing it to something like the Atrio M5 (which also has really deep bass, but with a really good quantity as well) or MTPC (which has a full amount of mid-bass). As far as PRAT is concerned, I think RE262 is probably the better PRATy IEM than RE272.
 

 

post #15 of 110

Thanks for this, ClieOS. I was initially quite excited when I read Joker's glowing review of the 272's a month or two back, but I cant justify the extra spend over my RE262. There ARE times when I would appreciate something closer to my dearly departed RE0s, but generally the 262 is 'good enough' for now. If I was considering a more analytical pair of IEMs, it would probably be the DBA-02, but January is going to be an interesting month : best save those pennies for now.

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