4 stars because it makes a little noise when I turn it on, even without receiving a signal from any device, which didn't happen with my previous amplifier. However, I don't think it affects the sound quality when playing music. Everything else is positive! It has a lot of power in an impressive small package. Gain control and filters. Indicator light when it's on. The power sockets have a slightly large diameter for 8awg (I recommend using terminals on the cables for greater safety). I am satisfied!