I do not have a design for the Kappa 15LF


The Theater four π Speaker uses a Delta 15A, not a Kappa 15LF. And - Yes - The appropriate crossover containing top octave compensation is required. You will need to also calculate cabinet dimensions, as we discussed in your earlier thread on this subject. You can use the existing crossover, just find the right values of R1, R2 and C1 for your woofer and tweeter. There is a chart included with the schematic, so it is easy to find the right values for your application. I would expect you'll probably want the 10dB or 12dB values.


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