Charlie, thanks the suggestion. ?A quick measurement of the 4ohm resistors shows 2.9 ohms each. ?I do have a left and right sub, but unfortunately at some point decided to send full range from the Sub harm. synth ?to the DQ10s, instead high pass (a switch on the dBX 120 sub-harm synth). ?This may have been my mistake. ?I will still try the 180 rotation. ?