yes...if the h/u is getting power and turning on but not turning on the amp yes its the h/u...I have a question tho is the h/u putting out sound if so try makeing your remote wire the ignition wire ''RED'' from your wire harness and see if the amp will power on and play that way because if you are sure that the h/u is putting out a pre-amp signal and sure that the subs are good and the amp is powered on but not putting out sound its the amp and not the h/u