hi I have a onkyo tx-sr604
just purchased klipsh r820 reference speakers
not enough bass
picked up r120sw
my amp only has 1 rca plug for subwoofer
sub has 2 rca plugs
frustrated
can this sub be connected to this amp
ready to return everything
keith
504-228-5100
itd be nice to speak to someone who knows what’s up how to fix