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Another Yuin PK-1 Review!

post #1 of 30
Thread Starter 
Based upon the favorable reviews of the PK-1 in previous Head-Fi posts, I decided to give them a try. At worst, they would be an upgraded replacement for some of my other lesser quality earbuds.

I ordered from Head-Direct and was pleasantly surprised when they arrived about 4 days later.

I have now accumulated about 40 hours of listening time and will add my highest recommendations to that of other reviewers. Although these earbuds look similar to the cheap buds included with most mp3 players, they certainly sound different. Perhaps the most impressive feature is that such a tiny bud can produce the quality of sound equal to that of circumaural high-end headphones.

I have evaluated them with a variety of inputs and with a variety of amps, as well as running them unamped.

Although they are relatively sensitive, the higher impedance results in the necessity for a higher volume setting when driven directly from a typical low-powered device, such as my iRiver H120.

When used in conjunction with a headphone amplifier, they exhibit a fullness and soundstage that must be experienced to be believed! I have an older Auri Direct amplifier which allows one to select from about 12 different HRTF settings, as well as to specify the sound venue and how far back one is (virtually) seated from the performers. With the Auri optimized for the PK1's the soundfield is stunning! Instrument placement is solid and the overall tonal balance is probably the most musical of any phone that I have owned. All the more remarkable when considering the small size and modest cost, especially when compared to the cost of larger, highly regarded conventional headphones.

The overall sound would probably be best compared to the AKG 501 with the bottom end of a Senn. HD650. Yeah, I know, this is hard to believe, but trust me, it is not my imagination, as I was quite skeptical prior to auditioning them!

I think that part of the sense of realism comes from the fact that they are so light and so easily worn that one very quickly forgets that they are wearing headphones, probably pychoacoustic factors enter into the picture here. One simply is aware of the music, and not the phones.

The only drawback, if it can be considered a drawback, is that they provide very little in the way of isolation, thus are not really appropriate for noisy environments, unless you want to listen at levels that are damaging to your hearing.

I do find the overall SQ and comfort to exceed that of my Westone UM2's, and much more "you are there" than my Etys. I now consider them to be my primary listen!

Bottom line: Expensive for an earbud...CHEAP for a headphone of this audiophile quality!!!!

Gear mentioned in this thread:

Yuin Pk1 Earphones
AKG K701 Studio Headphones
post #2 of 30
HiFlight, what do you think of them compared to akg 701s? i am thinking of getting pk1 and own 701s. really love 701s. are yuins nearly as detail oriented or revealing as 701, particularly in midrange?
post #3 of 30
Nice report Ron. I have wanted to purchase some of these but I am always concerned they won't stay in my ears correctly. I know Simon loves his also.
post #4 of 30
I have the PK-1, and I love the sound. But, the magic disappears when the foam disks/sleeves aren't used. I also find it difficult to keep them from falling out of my ears. So, IMO, the sound is great, but the PK1's a bit of a pain to use.
post #5 of 30
Hey John,

Quote:
Originally Posted by jamato8 View Post
Nice report Ron. I have wanted to purchase some of these but I am always concerned they won't stay in my ears correctly. I know Simon loves his also.
And that's exactly the whole point. They sound incredible, but for my ears, I have to fiddle a bit to find that sweet spot. It's like IEMs in that respect. If they move just a little bit, they get tinny. If your ears are shaped so that they fit directly in front of the earcanal, you're golden.
post #6 of 30
Read many reports here stating that the PK1's perform the best when amped. That plus its lack of isolation does not make it ideal in outside settings, does it not?

This applies to the PK2's as well. They don't isolate that well so really...I don't see the point of ever using them outside. Don't you guys find you have to turn the volume way up on your portables just to hear the music?

What am I not getting?
post #7 of 30
Thread Starter 
John, I find that the PK-1's stay in my ears just fine even when jogging. The stem has a slight curve that just lays in the bottom groove of my ear. Yes, they lack isolation, but in that respect are no different from listening to a home stereo system or auto stereo. I just turn the volume up some when outside. I would probably use my Ety's or Westones when on an airplane or other really high-noise environment

I use them unamped when running, but mostly amped when inside. As others have stated, amping does bring out the true potential of the phones.

They have a similar but fuller sound than my AKG 701's. They present a closer image than do the 701s. The tonal balance is superb, with difficult sounds such as cymbals and snares represented very nicely, but without the overly analytic dry sound of my Etys.

I failed to mention that I am using the foam pads that have the hole in the center. They seem to sound better than no pads or the pads that are solid on the outside.

If an IEM such as the Ety or UM2 works satisfactorily for you, I should think that the Yuins would also. I have a set of Westone 3's on order, and will be very interested in comparing the 2. I hope it wasn't a mistake to order the Westones.

When sweeping with an audio generator, I get almost identical balance and response with both the 701's and the PK's. Considering there is fundemental response audible at 20hz, this is nothing short of amazing!

I do believe that detail and imaging is better in the 701, but considering the differences in size and cost, they are remarkably similar. The bass response of the PK-1 is stronger and every bit as well defined as that of the 701.

I am astonished at the sound of these tiny phones every time I put them on!
post #8 of 30
Thanks a hole lot. Yes hole, another one in the moneypit of audio. :^)

Well I thnk I may order these but I have a number of bills right now so I will see but I bet they would sound great with the Reference.
post #9 of 30
damn, if they are as good as akg 701s im gonna have to get another set of headphones. i was hoping you would say " details are muddy, a good bassy headphone" , now i am in trouble. these might replace my grados for on the go. ive been bicycling with grado sr-125 for years and love the sound, but its impossible to wear a helmet with the darn things! plus i get kinda funny looks and cable is a little chunky for packing. all right i am gonna buy these damn earbuds! i cant believe i would even think of buying another earbud, so many dissappointing earbuds in my life!
post #10 of 30
Would you recommend any portable entry lv amps with them? Any would do I'm guessing since not they're not too hard to drive? I mean I've heard reports here stating that it's possible to even hear sound from these things without amps so I'm guessing it's not too bad.
post #11 of 30
all earbuds are crap
post #12 of 30
Well, though impressive I personally would not say they compare to the K701s. Though it doesn't come down to price point - it is the SQ that matters in the end - the headphones that are discussed here on Head-Fi are basically cream of the crop for their relative price range. Comparing the PK1s to a $300+ headphone is doing them a disservice. Now some may prefer the PK1s due to their warmer signature but they do not have near the detail, soundstage and range the 701s present.

I would also say that lack of isolation is not a knock against the PK1s. Inherently, earbuds are not going to give you isolation due to its design. If someone is looking for isolation in earphones you should first shop for IEMs. Canalphones will also work but not to the same degree as IEMs generally speaking.

All that being said, Yuin has created quite a gem and it amazes me the level of SQ they've attained with the PK1s. I like that they look like cheapo earbuds - they won't attract attention in public. Fit can be hit or miss but that is the case with all earphones since all of our ears are shaped a bit differently. They shine with a headamp because these things are rated at a crazy 150 ohms. If you're planning on getting them and plugging them into your iPod or Nano - save your money and get the PK2s. It would be like buying a Porsche just to go to the grocery store with. Yes, they sound very good unamped but you won't be realizing their true potential.
post #13 of 30
Quote:
Originally Posted by warrior05 View Post
If you're planning on getting them and plugging them into your iPod or Nano - save your money and get the PK2s.
I agree with you up to that point, but on this matter my opinion differs. I like the uamped PK1 a good deal better than the unamped PK2 or PK3, which simply have a less enjoyable signature for me. It's true that an unamped PK1 isn't being driven to its full potential, but I think what matters unamped is how good it sounds, not how good it could sound if it were amped.
post #14 of 30
My oppinions...

I dont think the PK1 compares favorably to the K701. The K701 has so much detail and resolution as notes/sounds decay. While I would say note attack is very similar. Its the "descent" of notes that JUST FLOORS me with the K701. FWIW, the 701 also outshines the RS1 (my favorite can) in this regard. IMHO the 701 soundstage is much bigger than the PK1 too. Note that it takes some seriously revealing sources, and synnergetic amps to expose these differences

No knock against the PK1... come on... we're comparing a $125 earbud to a K701. I think the PK1 deserves some praise to even be mentioned in this light.

I also tend to prefer the PK1 unamped over the PK2 I demo'd. The PK2 doesn't quite have the bass extension of the PK1. You all should note that unamped for me means a vintage PCDP. So... IMHO its all relative to the capabilities of your unamped source.
post #15 of 30
Quote:
Originally Posted by episiarch View Post
I agree with you up to that point, but on this matter my opinion differs. I like the uamped PK1 a good deal better than the unamped PK2 or PK3, which simply have a less enjoyable signature for me. It's true that an unamped PK1 isn't being driven to its full potential, but I think what matters unamped is how good it sounds, not how good it could sound if it were amped.
Point well taken. Though I can't comment on unamped PK1 vs PK2 I do agree, if the 1s sound better then go for it. Just be wary that some players may not be able to drive the 1s. And I don't mean in regards to potential. When I first tried the 1s at the NYC meet, I plugged them into my tiny Cowon F2. I was nearly at max volume to be able to hear enough. Granted that is in a noisy environment but if someone is planning on using them for commuting or whatever, your player may not be able to boost the volume loud enough.
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Gear mentioned in this thread:

Yuin Pk1 Earphones
AKG K701 Studio Headphones
Head-Fi.org › Forums › Equipment Forums › Headphones (full-size) › Another Yuin PK-1 Review!