I have a nitro bmw 483 1000w 4ch ampilifier. I just installed a new stero to the amp the lights in the amp all come on and i have a green lite on the exterior of the amp. My problem is I am getting no output to my base speakers. I have 1 10" kicker speaker and 1 8" tube speaker. I have been looking for a manual for this amp but not having much luck with that. Any ideas anyone???