I will try to write correctly because my English is not perfect.
Before 6 days finally I got the new Superlux HD-330 150 Ohm.
How I tested and Equipment.
I am also an owner of HD-668B. I had them from 4 months. I have also Zennnheiser HD-530 MARKII 300 Ohm, AKG K141 Monitor 600 Ohm. I use EMU 1212M sound card for listening music which is one of the best in world, top DAC-s CS4398 and par to par with LynxTwo. I have several others, Audigy 2 Platinium Pro, X-Fi Elite Pro, DAC Musiland Monitor 02 US, and two DAC-s made by one old technician who is audiophile too.
All headphones are tested many hours in different music genres.
I tested with Foobar2000 last version -> ASIO /More better sound than KS/ and True 100% tick silver cable. I tried many and many audiophile cables last 10 years, and this silver cable sound better in any aspect. No name, this cable are from military air base. I have only several meters more. And I will keep them in safe box until I am live. With this silver cable all music has better sound stage, more wide and deeper sound stage, better detail and every sound is as washed, clear and more clear. The most good side is instrument separation. Oh! Every instrument is perfectly separated and you can hear so easily exact location. I am in love with this cable. So warm… I tried so many cables, many big names, but when I plug this thick silver cable, every other cable just die, they sound muffed, woolly, cold, no separation, no LIFE in music – ugly.
The best sound is undoubtedly from EMU 1212M. In many review-s is on par with one of the best sound card LynxTWO and I see why. The sound is just amazing.
Musiland Monitor 02 US is not bad too but lose badly in several aspects. I like it but sound is more simple and you will miss detail in bass - flat. Highs are little harsh. And sound is more static. Music also just don't move and it's not feel so life. Anyway lets talk about Superlux HD-330.
I make all tests with: Vivaldi, Mozart, Handel and many more 24bit 96 and 192 Khz. Also many audiophile CD-s: FIM Audiophile Reference IV (HDCD), FIM Super Sounds III (XRCD24), HDEND Audiophile Air, Audiophile Female Voice, Stockfisch Records – Closer To The Music, TRUE AUDIOPHILE Best Of Groove Note, Various Artists - Master Female Audiophile2, True Stereo-Naim Records Audiophile, (Vocal Jazz) VA - Uncompressed World Vol.II - Audiophile Female Voices - 2010 and several others.
Compare HD-330 VS HD-668B
Please read this review: http://www.headfonia.com/the-new-superluxes-are-good-the-hd330-hd440-and-the-hd660/
I will say that HD-330 is better choice in any aspects compare to HD-668B. Comfort is better. In HD-330 there are no harsh high and they have much more accurate sounding. High are more refine, correct and sweet. I don't like boosted artificial high of HD-668B. They are not natural and sound too cold. Bass is amazing in HD-330, more deeper bass and go down and down, HD-668B had good punch bass, but bass can't go so down. I think under 80Hz HD-668B has big problem. In some way may be bass is too much in HD-330. But they are not burned yet.
The mids- Oh!!! Yes. This is the real thing. That I didn’t like the most in HD-668B. But here in HD-330 mids are fantastic. So refine, just beautiful. Little more forward sounding, but dipper sound stage. These headphones HD-330 sound much more rich, warm, refine, clear and PROPER and definitely more musical. I compared all headphones. The sound from HD-668B is more wider but it's too much, it's not real - lack focus, /edit/ also lack thickness. Focus is important. HD-668B sound more cold and flat and thin. Wide but flat in one dimension. High are harsh and not refine. Sound from HD-668B is not the real natural sound. There is difference in timbre.
Superlux HD-330 are more correct, just better, warm, delicate sound, refine and more density. And even more dynamic. Strange, HD-668B are very dynamic, but HD-330 are better. Detail is still there. Don't get me wrong, HD-668B are very good headphones, but these HD-330 are better. The sound is like from higher class cans.
Both HD-668B and HD-330 must burn in first. HD-668B start sound good after 100-120 hours. Before that they was too cold, harsh and thin and too flat. Now after 200 hours they are much better.
My HD-330 have just 30 hours play. And there is a change in sound. Now they sound even better. They are more smooth with awesome detail. Even now they are better than HD-668B.Another interesting fact, 150 Ohm HD-330 are easier to drive compare to HD-668B. They sound louder than HD-668B. That is because HD-330 are more sensibly cans. I prefer the sound of HD-330 more than HD-660 /the same cans but closed/. Compare to my other cans... Well Superlux are better. Zennnheiser HD-530 MARKII are not bad, but they loosing in bass and not so wide sound stage.
Excellent work Superlux.
Edited by Nikalsson - 8/11/12 at 8:34pm