I've just ordered my 2nd SVS 20-39 PCi! I've been thinking about calibration of the second sub and would welcome any input. In my particular set-up, I have to place the two subs on opposite sides of a wide screen TV. I'll call the original sub "A" and the second sub "B". Here's what I plan to do. 1) make sure that sub A is calibrated to level and phase with other speakers with AVIA and a RS spl meter. 2) Turn off sub A and turn on sub B, then calibrate to level with the volume knob on the sub...to match the level of sub A. 3) turn both subs on and use an LFE channel only signal. Use the phase switch on sub B to get the best response between the two subs. Remember sub A is already in phase with other speakers, so I won't mess with that phase switch. 4) re-calibrate the sub level to the other speakers, with both subs on. Sound right? Anything I'm missing or do you have a better technique? Thanks.