You guys are going to think I'm nuts, but this HD-650 I got in doesn't sound that dramatically different than the Q701 I have. Perhaps I have the most neutral sounding HD-650 ever made. You can listen to some songs on each and they sound very similar. On bass heavy material, it's a totally different story. I actually find both accurate and true to the recording. The bass on the HD-650 seems to be hiding when it's not required. This pair doesn't magically add bass to anything when it shouldn't be there.
The 650 sounds like a Q701 with the treble chopped off VERY slightly. So this also mean it's lower mids are a tad more forward and it's
slightly fuller sounding (yes, I really did say "slightly"!).
Most people will say they're total opposites if you didn't own both.
This HD-650's bass is weird. It has slightly more presence than my Q701. A tiny bit better low bass extension, but not by much. I would say the quantity is similar to my DJ100. It doesn't have a mid-bass hump that sticks out like a sore thumb. The 650 definitely isn't bass heavy to me.
Obviously the HD-650 is a bit fuller sounding (that has it's negatives sometimes), but the Q701 has better treble and often sounds clearer.
The HD-650 I have is totally different than the version I had in the past. That one had bloated mid-bass, a muffled sound and was too dark.
Maybe there really are some Q701s that are quite bassy (not bass heavy!).
I actually find the Q701 smoother than the HD-650 (pre burn in). The HD-650's lower mids are kind of too forward with some music.
It seems that both of these headphones can sound totally different between recordings. Sometimes the HD-650 puts me to sleep with bad recordings. My Q701 can often sound like either an HD-650 or AD700 depending on the recording. This is so very bizarre...never had a headphone do that. Of course I don't get that effect with the HD-650, but the sound does vary a lot. Maybe the Q701 is just more accurate. Not sure.
Loving both right now. The HD-650 isn't too dark at all for me yet and that's coming from the Q701 (which also isn't treble happy at all IMO).
Check out this graph:
I rarely ever trust or agree with graphs, but the Q701 graph is pretty close to what i'm hearing.
The 650 does sound a tiny bit bassier, but maybe it's due to having less treble. The lower mids on the 650 definitely seem more forward too.
I honestly don't find the 650 to have recessed sounding upper mids at all like some do.
BTW right now I prefer this (weird) HD-650 to my 580/598 and HD-600. Never would have said that with my last pair!
The Q701 isn't going anywhere. The HD-650 and Q701 is a pretty nice pair to have depending on mood and music genre.
Oh yeah.. there's another guy (NA_Blur) with a recent post that said he said the Q701 and HD-650 had some similarities. I would have said he was nuts until I compared them.
Maybe he has the same setup as me
I'm using the ODAC to Headroom Micro Amp (quite neutral IMO) with a DHC DIY interconnect and stock HD-650 cable.