[serene911]

Flatbutt, You would be better off dumping the RCA sub and getting a real powered sub that
will have an Ac cord to go to the wall and usually a RCA cable that will connect directly to your
reciever. If price is a concern go to Costco and they have a lower level Klipsh sub that will
more than likely totally out perform the RCA. Most good subs are going to be in the $350.00
to $1000.00 range. A good sub will also have a gain/volume knob on the back so you can dial
it in to seamlessly match with your other speakers. The cheap subs will not have an array of
connections on the back which limits there functionally. I've seen better subs at Goodwill than
the RCA sub you are trying to use, respectfully.