OK i have a Aiwa 600 watt, 120 watts per channel, with 8 speaker slots 4 for frontal speakers, 3 for surround speakers, 1 for center speaker, and 1 for a subwoofer but the circuit board is fried should i repair it or use my 116 watt Durabrand DVD/Mp3/CD reciever with 6 speaker slots 1 for a sub, and the rest are just surround. Which one should i use??? My sub is a 15" Sanyo sub that is 120 watts...