"Listen them first. If you don't need real power output, consider crate kxv50 or the sumo 100."

Feature:
Excellent controls for treble, bass, mid, and several effects for each channel plus the master output controls with additional treble, bass, mid and effects. stereo link feature, this amp is completetely STEREO.

Quality:
Solid as a tank. controls can be better, however they look solid enough. Construction looks solid as well.

Value:
For this price, you won't find anything more powerful.

Desirability:
It's a good looking amp, little bit stylish, but pictures are not fair with it. Nice details on front.

Sound:
Excellent sound quality at high levels, I'm truly impress, this was my third attempt in the PA keyboard arena, first crate, then roland and finally this baby monster. I don't mind about brands, in fact I believe that something is not yamaha is not worth it. I couldn't find any yamaha PA, and just tried this one. sounds incredible with techno merengue and pop/rock and classical. No distorsion from a high quality source(AMP) and outstanding sound quality from my audigy 2 zs pcmcia and from my emu 1616 pcmcia as well. I was using a yamaha MG10/2 MIXER and a couple of yamaha S115V CLUB. I tested it with a without the S115V's.

Support:
I haven't dealt with them.

Overall:
TO be completely honest at this range, you won't find anything can beat this monster.