Small bass amp with transistors, 65W as the name implies, a 12-inch HP.
Custom designed to work in my opinion.
Simple connection: An entrance, a headphone output, and that's it. In particular, no direct output or output connectors amp ...
Settings: Volume, bass, med, and a treble booster. EQ efficient is not to say.
Very good build quality overall.
Namely that on mine, I had to add handles, but I've seen elsewhere with a handle on top. Also on mine, the knobs were poorly developed (the plasticky buttons were poorly placed on the knobs), I had to remove and recover properly. Nothing serious, it had to be assembled on a Monday morning ...
For this reason, I put that 9 / 10

UTILIZATION

You should know what you want:
He is 65 W and an HP 12-inch, so it is sufficient to work a title that goes on CD or ranges, or accompany an acoustic.
Once we talk about battery near (repeat or concert), need to remember: Unless you have guitarists who not push their amps (very rare ...) and a drummer strikes slowly (also very rare ..) this amp is not powerful enough. Or it will really have to push to its limits, and its release a draft (Oddly, the Si is no longer an infamous porridge even my 4-string to that point). I tested, that's when I switched to a more powerful amp (Fender BXR 300)
It has good sound, but it is a valid volume for which the amplifier is designed: raisonnnable ...
I have not had a good manual that I have bought new in store.
Remaining within its limits, I put 9 / 10 BUT this note is only valid in the reserve.

SOUNDS

Already answered above: Excellent volume reasonable enough for a rock band.
Capable of many different sounds through effective EQ.

OVERALL OPINION

With the experience not because I wanted to play rock and it was clearly not strong enough.
I keep it in case I have a really big problem with my main amp, but I'll have a big support through the sound system ...
I would not say it's a bad amp, but it is not powerful enough to play in groups.