Is there anybody who can help me properly set-up 2 subwoofers (PSW110). I had 1 PSW110, and I was happy with the sub. I decided to get another PSW110. It arrive yesterday, I was expecting that by connecting a second sub, I will get punchier sub sound. But when I hook up the second sub. I didn't expect what I heard. It didn't sound punchier, in fact I think the sub sound degraded. I adjusted the phase, maybe it was cancelling each oither. But this didn't help.