Assuming that I had found the ideal postion to place my woofer, is it normal that I have to turn the volume knob to almost maximum to hear the booming effect? Or should I increase the output level of my receiver? Thanks.

Yamaha RXV3800; 2xM80, 2xQS8, VP150 and EP350v3; Panasonic 50" TV; PS3; Harmony One; Denon 3930CI