Today I purchased a Pioneer – 8″ 100-Watt Powered Subwoofer SW-8 and Denom avr-1911 from best buy. He asked me to buy some cables and plug them into the subwoofer and plug the other end into any of the ports in receiver. However, the subwoofer is not working because the receiver doesn’t have an audio. Can anyone help me and guide me to fix this up?