I just had an Arcam fmjA38 integrated amp. I think it's great but it appears my current PSB bookshelf speakers don't provide enough bass. Is there a way I can connect my powered Mirage subwoofer to enhance the bass? I was thinking of connecting it to the SP2 speaker line out (The PSB speakers are currently connected to the SP1 line)? Is this possible and don't compromise or damage the amplifier? Or, is there an alternative way? Thanks.