Though not ideal, it is not unusual. I find myself adjusting my sub volume to suit the situation.
Robb, keep in mind that your sub is covering all sound from your crossover point (80Hz?) down to the lowest frequencies it can produce (like 20Hz?). Because of the dimensions and surfaces of your room, and the location of the sub itself, it is likely that the frequency response is not
flat over that entire spectrum. So even though the average output of the subwoofer is 75dB, it is likely that some frequencies may be louder than others.
My sub is in a corner, and this corner loading increases the output of the very low frequencies (boomy). I used my Receiver's EQ, but I zeroed all settings it came up with above 80Hz, leaving the settings below 80Hz (with a little minor tweaking) and feel that it really smoothed things out. If I ever have $600 laying around, I'll invest it in a Velodyne SMS-1
. Most of the subwoofer gurus I know swear by it (not at