All that stuff I said up above is real math. Axiom uses some of it in their DSPs. Sometimes I make up stuff to keep Alan Lofft on his toes.

You are correct that if these boards are to be used for knowledge only, I've been grossly negligent. I learned from the best like MarkSJohnson, pmbuko, Ken.C, medic8r and others.

Back to the topic at hand...impedance...which incidentally can be calculated by the FFT of the impulse response. laugh

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated