Re: Intro to bi-/tri-amping
One of the first QSC products I bought was a combination stereo crossover/HF amp (X1.2? I still have it, somewhere). The owners manual had a very concise explanation of how to compute pass-band levels based on component sensitivity (1w/1meter) and amplifier gain. QSC may still have that information on their web site.
If I were faced with speakers & amps I'd not used before and the crossover was ''zeroed-out'', I'd hook it all up, guestimate crossover points, send pink noise to the subs or LF and run it until the amp clipped or speakers reached their excursion limit, and back down a bit. Whip out the Rat Shack SPL meter, note the level, and turn off the LF and bring up the next pass band. With any luck it will achieve at least as much SPL as the previous band, and then move to the next pass band. This is fast and dirty; the pink noise keeps you from making decisions based on the spectral content of the music. It's meant only to get in the ballpark, not make definitive decisions.
None of that procedure will deal with what happens at the *acoustic crossover*, but it's a place to start.
Have fun, good luck.
Tim Mc
