Can you connect a powered subwoofer to the RCA outputs on the back my t.v...or do I need a amp? The guys at radio shack could not give me a straight answer.
seeing as you bought it at radio shack,and the fact that you need rca's on your sub,I assume it's not of high quality.My Boston acoustic,and Energy subs only have inputs for speaker wire.If you have a powered sub,you don't need an amp.
if you have a reciever(which you should)There is a test option that goes through each of the speakers one ata time to make sure they are all connected correctlly.You'll hear only static coming through one speaker at a time.But yeah,what 2 thick said.