"Nope, the Furman amps don't sound better than the amps talked about on this board. They aren't designed with high quality sound in mind... they are made to simply provide a headphone output for studio musicians from the control room. They sounded okay to me, but really they were just like the headphone out from the Mackie mixer I was using... not all that interesting."
--yes, true... they are mostly to provide outputs to the musicians either recording or are on stage. however, this does not mean furman did not try to make them "sound good." and they definately ARE NOT like the headphone outs on a Mackie mixer. i personally have a Mackie 32x8 (a $5000 board), and i can tell you, the headphone outs on that board are relatively weak, though are still more powerful than my MG Head. even the headphone outs on my Tascam CD player are more powerful than my mixer's. i quote:
"The Furman HA-6A's 20 watts-per-channel make it ideal as a low distortion headphone driver for the most critical listening situations. While most headphone amps provide half a watt or less per headphone channel, the HA-6A's higher power can drive headphones of any impedance to their full rated listening level, and do so with minimal noise and distortion."
believe me... your Mackie mixer does not have a 20wpc headphone out. no way.
yes, i have not heard them... and it is possible as you observed that they don't sound all that great... but don't think these headphone amps are your standard outs from mixers/cd-players, etc.... they are anything but.