I have a 6.1 satellite home theatre system. The center speaker has 4 3-5/8" woofers with a 7/8" tweeter. The fronts and surrounds have 2 3-5/8" woofers with a 7/8" tweeter. All speakers have a response of 80Hz-20kHz. I am using a 12" sub that has a response of 30 Hz to 180 Hz. On the subwoofer i have the LFE switch turned to on allowing my receiver to be in full control of the crossover frequency on my speakers and the upper bass output on my subwoofer. I have the crossover knob on the back of the sub turned all the way up to 180 Hz. My speakers are set to small on my receiver. I have the crossover frequency set at 80 Hz for all my speakers and the subwoofer LFE high cut is set at 100 Hz.