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RE: IIIa Frankenpan Active X-Over points?

When you alter crossover settings from textbook settings, you certainly will create holes in the response.....but in the electrical summation of the slopes, not necessarily in the acoustic response. Nearly all speaker systems (Maggies too) use non-textbook electrical responses to create proper acoustic crossovers. This is the essence of crossover design....but it's not fully appreciated by many users.

-3db simply means that's the frequency at which that electrical filter rolls off to -3db from the passband response. It's confusing though when programming DSP units because different crossover alignments designate different cutoff points depending upon their type. Butterworth crossovers have adjacent filters equal at -3db, Linkwitz-Riley crossovers have adjacent filters equal at -6db, etc, etc.

Cheers,

Dave.

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