Hey guys I have just finished building my home sub powered by the crown xls1500. I use a onkyo tx sr 805. I have heard many good things about this reciever and amp. My issue is that I am running a RCA from the reciever to the amp, sub wired to 8ohm bridged on amp. Getting little to no bass out of sub.. Volume has to be turned up to 65 on reciever to get the slightest bass from the sub. Not sure if I'm getting enough voltage to the amp from the reciever, if you have had this problem could u please help me.. Been waiting along time for this setup to be complete., any advice is appreciated..