It seems like my sub won't give me any bass if it's been off for a bit and I then play music starting with the volume extremely low. If I turn the volume up just a little, the sub will kick in nicely and I can turn it back down real low with no ill effect. This scenario involves playing music with iTunes on a Dell 400SC server with a Hercules sound card cabled with fiber to a Kenwood VR-6070 which feeds a SVS 16-46 PC Plus sub and five Superone XUs. There's too many variables within that setup to ask for specific diagnosis. I just want to know if subs do indeed need a little wattage to get moving.