Bests & Worsts Reviews from Amazon

As a lover of classical music I am a confirmed headphone listener. No set of speakers will offer the same amount of detail, most living rooms will add acoustic distortions, and many of us are not lucky enough to be able to play Mahler or Shostakovich at full power on a daily basis without getting into trouble with the neighbours. For years I have been very happy with the Sony CD1700, an excellent headphone which is my point of reference for evaluating the HD650. The rest of my hifi set-up consists of a Marantz cd7300 CD player, PM7200 amplifier, and Musical Fidelity X-Can v3 headphone amplifier (a mandatory commodity if you intend to spend serious money on a headphone like this one). Also, I invested in the Cardas replacement cable for the HD650. It is often said phones like this one need a 'break in' period. I used to regard this merely as snobbish audiophile technobabble - but found it to be actually true. Initially, I was less than pleased with the sound of the HD650, to put it mildly. Mid-range, mezzoforte strings (which make up a VERY large part of orchestral music!) sounded grey and weirdly disembodied. Stereo separation was exaggerated while the middle part of the soundstage seemed empty. Compared to the breezy, open sound of the Sony, the Sennheiser seemed compressed and less immediately involving. Things were not helped by the fact that the wearing comfort of these cans is markedly inferior to that of the Sony. The HD650 has fairly small shells that are not ideal if your ears aren't quite that small. Also, they are clamped against the head rather tightly, which is not entirely pleasant. The Sony, by contrast, simply lets you forget you are wearing it. But then, after about 50 hours of listening, things had changed rather much. Not with regard to the wearing comfort, obviously, though you do get used to the way the HD650 feels; - but soundwise. The sound had opened up completely; not only is it now as fresh and involving as that of the Sony, it is clearly superior. Everything is incredibly focused, tightly in place, resulting in a very clean sound picture. The bass is far superior to the Sony, and is noticeably warmer. Bass drum strokes or double bass pizzicati sound nothing short of sensational. Instrumental colours are marvellously defined throughout the orchestral ranges. The level of detail is quite simply stunning. I am not exagerrating when I say that I've heard new things in nearly every disc I played until now (in an old-time favourite, Bernstein's DG recording of Stravinsky's Les Noces, I was bowled over by the precision with which the four piano's, which had always sounded as a single instrument to me, were individually separated). Interestingly, a sense of underlying energy is retained even in the softest passages; I notice that with this headphone large scale symphonic works may sound completely satisfying even when played at fairly low volume. All in all, I am now extremely pleased with this acquisition. It is hard to imagine that headphone sound can be much better. Listening to a well-recorded disc (and beware! these cans will mercilessly reveal which discs aren't so well recorded) you can easily imagine yourself to be sitting in the concert hall. As a postscript: I am less sure about the cable issue. Many HD650 owners advise the replacement of Sennheiser's stock cable with a Cardas cable. Now, I always have the feeling that in these more esoteric regions of audiophilia, there is somewhere a point where actual sound improvements become extremely minimal, and myth or even madness set in. Yet, as I was splurging anyway, for once I went the whole hog and bought myself the Cardas cable, too. Frankly; you don't really need it. I will not go so far as to say it doesn't make a difference; it does. There is, at times, an extra sparkle to the sound. But it certainly is not a prerequisite to fully enjoy the wonders of the HD650 (quite apart from the fact that the Cardas cable is a hideously ugly thing to behold, makes the phones far more cumbersome to wear, and unlike the thinner, more supple stock cable causes contact noise).