Doesn't your receiver have remote speaker level adjustments ? The HT preamps and AVRs I've owned, including my current Marantz unit, have all allowed for on-the-fly level adjustment of each speaker, including the sub(s). If I'm watching/listening to any material that has too much or too little bass, I simply decrease or increase the sub level by several dB. The unit also has remote bass/treble boost and cut of several dB.