Bought two years ago, mine works without problem ...

+ + + The sound is neutral with no color particulire.
+ + + Good finish of the whole.
+ + + 4 inputs, including 3 in Stereo jacks symtriques. Bravo! and more with activation buttons faade ...
+ + + Headphone powerful
+ + + Button "mono" CONTRL how essential sound mix in the ... mono!

--- Given that serve no nitre
--- Only the output jack on speakers A symtrique (other CAR).
I also speakers AIM B jack symtrique

In short, the price, say nothing.
did his job and it is essential to see the practice home studio.