Geddes Bandpass Subs and the Multi-sub approach

[gedlee]

Very long ports can be a real problem because of standing waves in them. Unless you know how to deal with this, I suggest not doing it, but it could be made to work with the right design. The open cell foam suggestion is what I do.

[MethMan]

In which domain is averaged spatial measurement of subwoofers? Can I average IRs in modal region?

[gedlee]

No you cannot average impulse responses. The averaging must be done in the frequency domain. The issue of weather to average dB or linear is interesting, but the correct way is to average the dB, because that what the statistics are in. But it makesa very little difference either way - linear or dB - except at very low nulls there is no difference at all.