Good amp... while it lasted.
I loved this amp for several years. The sound quality is fairly transparent, the amp keeps very cool, and the knobs and clipping lights are laid out in a very friendly, easy-to-use fashion.
However, recently the amp began to run into problems. One or both of the channels begins to distort, go quiet, or turn into static. The only fix I have found is hitting the desk the amp rests on which temporarily restores audio, but it is only a matter of time before the signal goes out again.
While I might generally write this down as a lemon or a problem specific to my setup, I have found numerous accounts of similar problems for other users of this product.
I should further add that Alesis was not particularly helpful, where instead of granting me access to the schematics for the amplifier so I could repair it myself they told me I needed to take it to a qualified technician.