having owned hd 650s + these headphones at one time or another, i agree 100% with this bass quantity comparison.
btw how does sub-bass quality and bass decay compare on k702 annie vs. hd 650? the hd 650s have very clean deep sub-bass that is very subwoofer-like imo without becoming bloated or exaggerated, though it tends to be on the one-note side at times.
I find them similar in their bass, but from memory, I'd say the K702 Annie has more sub bass. I honestly didn't expect it. It has good bass all around. Quite a step up from the Q701. I honestly tag it as a departure from the AKG sound I was accustomed to. Its so musical, which isn't how I'd refer the other Ks and Q as being.