Bass knob did NOT work when purchased new, but I have this amp running 2 12 inch 600w XXX in 1 single port box. Sounds extremely nice, easy to hook up, came with the allen wrench to take the cover plate off to hook up the wiring. Over all no complaints aside from the bass knob not working. Have been using this amp for about 7 months and have not had a single issue. Definitely would recommend to a friend.
