Lifted off the Q and A at Epihani's website: How Should I Match My Amp With My Speaker Cabinets? For optimum results the rule of thumb is that your amplifiers power rating should be HIGHER than that of your speaker cabinet. Look at it this way... If a car that can only reach 100 MPH is driven at 100 MPH, it is being forced to operate at its maximum capacity and will not perform very well, but if a high performance car, that can reach a speed of 300 MPH is driven only at 100 MPH, it handles beautifully because it has plenty of power to spare. In like manner, a 100 watt amp, when using all 100 watts is being driven to its maximum capabilities and will not perform well. However, a 500 or 1,000 watt amp that is using only 100 watts of its power is going to perform MUCH SMOOTHER because the amp does not have to push itself at MAXIMUM power to reach the 100 watt level. The result is a much CLEANER TONE at higher volume levels. How Should I Set the Level Controls On My Power Amp & Pre-Amp? On your Power Amp turn the volume to its MAXIMUM level and than back it off just a bit (until there is no noticeable hiss), then use the MASTER VOLUME on your pre-amp to determine the OVERALL instrument volume. Be sure to keep the pre-amp volume UNDER its maximum level since pushing BOTH the power amp and pre-amp to the maximum will result in distortion and possible damaged equipment. Back off on the PRE-AMP VOLUME if you hear distortion (crackling or farting noise) from the speakers. How Should I set Up My Bass Cabinet for Optimum Performance? To achieve the best bass response all bass cabinets should be set SQUARELY on the floor (i.e. all four corners firmly touching the floor). However, if you find that a BOOMY sound is resulting from a wooden floor etc., then simply RAISE the cab up off the floor or try TILTING it back to rectify the situation. You may want to try an Isolation Riser an inexpensive, high tech foam pad that floats your cab off the floor.