I just built a new sub (dual SI D4 HT18s) to replace the one I built about 9 months ago (single Dayton HF 15"). I wired the coils of each sub in series and the subs themselves in parallel. I switched the speakon connectors so that the negative cable in plugged into the 2+ holes (the positive side is still connected to the 1+). I have an rca to xlr connecting my receiver to channel A input (just like before) and the speakon connected to the channel A output. I have the inuke set to bridge mode in the software (had to do it through the front panel since I misplaced the usb cable for connecting to a computer). I am getting no sound whatsoever. Also the input lights on the front panel aren't coming on at all. What am I doing wrong?