I have the 650 and the 600, not the 6xx, but assuming arguendo that the 6xx is the same as the 650 then, yes, there is a discernible difference. The 600 is more neutral but, to my ears, not as smooth and musical as the 650. Also, both of these headphones are receptive to modding, if you’re into fine tuning (not talking major stuff, just things like pad rolling and playing with wires and foam will make subtle but noticeable changes to the sound without changing the overall signature) but, most importantly, at 300 ohms resistance, they scale with better sources and amplification MUCH more than lower impedance headphones designed to sound good from your iPhone. I also respectfully disagree with you about the Audeze. I had a pair of LCD-X for about a year (not to mention Ananda, Focal Elear, and a host of more expensive cans). They were all wonderful in their way, but ultimately I decided to sell them all in favor of the all-around queen 650. I believe you can get MUCH more satisfying results with a pair of 650’s (or 6xx) and a powerful class A SS or a really good OTL tube amp than with a pair of $1,000 headphones and a less accomplished amplifier. Anyway, choosing between the 600 and the 650 is s matter of preference. The 600 might be the better looking sister, but she can be a little aloof. The 650 may be slightly less perfect, but it’s in a musically engaging way, and she’s much more fun at a party. I keep the 600 at my bedside with a smaller set up and it’s great, but I keep the 650 plugged into an oldie but goodie Burson Soloist running off my main system for serious musical pleasure. Right now I’m listening to a Keith Jarrett solo piano cd (Creation) playing on a naim CD player with hi-cap2, through the preamp section of a plinius hautonga integrated, into the Burson powering the (slightly modified) 650s, and I’m telling you it does not get much better than this. I don’t know what amp you’re using, but IMHO, with proper care and feeding, your qualms about the 650s being ‘veiled’ will vanish. YMMV, just my 2 cents, etc., etc., but I’ve been at this for 45 years and I’m dead serious when I say that if you’ve already got the Sennheisers you will get more satisfaction out of investing in a super amp than you will by swapping headphones.I've been listening to the HD6XX for one week now, I have K712, LCD 2F (2017), Grado 225e, I can see why people call this the tonality king, cello sounds absolutely phenomenal on these, best I've heard that instrument sound, that being said I believe the LCD 2 is the better headphone overall, much more refined sounding, better bass, a room sized soundstage with good imaging that spreads from left to right evenly, the HD6XX definitely has that left right centre blob imaging, compared to the K712 it's actually nice to have a more defined centre image.
I'm very eager now to hear how the HD600 sounds, I would like that touch more 'neutral' flavour, I wouldn't call the HD6XX veiled like some people say, just smooth, it's a warm sounding headphone no doubt, you guys know if there is much of a difference from the HD6XX and HD600?
Last edited: