I have had no joy on connecting a subwoofer as I have a dali fazon sub 1. It says on the quick start guide to connect into the subwoofer port front although it has one on multi channel I tried both and and went to test and no subwoofer sound I put the volume on half the crossover on half phase on 0 power mode auto mode on normal and still no joy. The sub works as when you touch the wire end on metal it comes on. Is the amp damaged