Notwithstanding the cable argument, going monoblocks certainly isn't about trying to cut down the speaker cable length though in theory it sounds good. In XLR, the losses and noise rejection would be better than what you incur in speaker cable, hence the common thought.
If anyone sees my setup, they would still see that I use 4m speaker cable even though my monoblocks are right next to my speakers.. there are some reasons for this, but none of which would appeal to those who believe in theories. :)
But anyway, steering this back to head-fi, both these arguments don't really apply since cable lengths are relatively short in either case. It's just whether we believe going monoblocks or even dual mono for pre-amp have a benefit, and why are there so few headphone amps that are built this way.
Edited by Quest88 - 8/12/12 at 7:55pm