Just a follow up to the low output on my back sub. I followed EEman's recommendation on the wiring hook-up to the back sub and adjusted the phase control. I removed the Y connector from the front sub input and connected to the red only. Then used the red only output to the back sub with a Y connector to the inputs. When I removed the Y connector from the front sub input it reduced it's output a little and balanced things out.

Thanks for the advice

I also plan to order the OAW3 for my back sub. This will allow me to move the back sub around to different locations for the optimum bass response.