I have a Samsung hw-d700 reliever rated at 120w @6ohms. Bi amped. Going to 2 alpha 50 8ohm infinity tower speakers.Towers are setup to be bi amped. My problem is I get not much bass out of three woofers in the towers. I have the receiver crossover set to 60hz. The front speakers set to large. Is the same weather I have the sub set to on or off.... Myou understanding is that 120watts or more at 8 ohms.... should be going through just them woofers.. and that should be plenty to get them pumping pretty well. . Right now I can turn reliever 90% up and woofers barely move... Any help on fixing would be appreciated.