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I know it has been published else where that the equal power points for a biamplified system with "typical" music content (whatever that is) is around 350-400Hz. What I am interested is where the point is for a typical three way subwoofer system where the sub crossover is in the 80-100Hz range. Assuming a constant directivity arrangement for the upper two sections. Since below 100 is sort of the 30% point I'm guessing the ideal xover point will rise to at least 800Hz and perhaps a bit higher.
The goal here is to come up with an point that more or less optimizes amplifier power when the two channels of one amp is use for both upper and lower sections.
I guess if I had a stereo power meter or at least a pair of peak reading volt meters I could try adjusting the crossover experimentally on real material until I get similar peak voltages.
Your thoughts and experiences welcome.
Follow Ups:
Are you asking about sound reinforcement in a large venue, or sound reproduction in a home environment?
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Power density across the spectrum decreases at 3dB/octave, thus the use of pink noise. But you can only go by that if your speakers are equal in sensitivity and your source material flat, which is generally far from the case. Since most subwoofers have less sensitivity than woofers, and woofers have less than midranges and midranges less than tweeters power requirements are tilted to the low end. It's not unusual for a typical pro-sound system with subs crossed at 80Hz to have half the power driving the subs. From there the remaining 50/50 split often runs around 800 Hz.
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