I did not really find default, manufacturing is correct (looking collection outdoor), looks very solid, apse weight (20Kg), possibility of the rack ( 2U if I remember correctly). The only default that I found is the sound of his ventilos, a breath. But I made good use specially enough, I used to play guitar. I use Amplitube on a Mac, and I drive the output to the amp, which is connected to two speakers MC352 (Boost). I can not really criticize the product because I know nothing about the sound.

Good qualitprix, pay 400, with the pair of speakers is the low end, but enough for me.

Edit (June 2005): I was playing in a group, has allowed guitarists to play without lugging the amp, you plug a V-Amp, or a laptop, and then voila.
I do not play in groups, both solo, as a system that was unnecessary. Also the sound of the speakers is crap. I therefore am spare.
But I still say that for beginners with sound, the amp seems to me correct, on the other hand for speakers, look elsewhere.