I have a 4x80 RMS amp (mrv-f540) that I'm using for fronts and sub. First two channels power the front mains. My plan was to bridge channels 3 and 4 to a single coil 200RMS sub (alpine sws-1041). However, I'm finding that I can get two 1041D's (dual 4ohm voice coils) for the same price as a single 1041.
Can I wire both coils in series for an 8 ohm impedance, then wire the two subs together in parallel for 4 ohms total on the bridged channel?
My understanding is that the 2 x 80 bridged = ~240 watts (2.5x single channel power). Alternatively, could I wire a single 300 watt Type R dvc in parallel and then run that off the bridged channels at 2 ohms? I'm guessing that would give enough power for that sub. Would that cause problems with the other 2 single channels giving 4 ohms to the front speakers?