Ill try this when off. Set “ sub output” to max? And “bsss engine” setting on hu?first off lets see if we can get you some output without you spending money first. volum up high like 90% if possible. Gain down low, no bass boost. Low pass filters at 80hz, Sub level high up, now play your hardest hitting song and raise the gain till it stops getting louder and back it off a slight bit.