Could I use a passive radiator to replace the port in a bandpass cabinet?
This is a very interesting concept that we have done some experimenting with. It works very well to get a large amount of output from a small cabinet. Using a single light PR for the high frequency chamber and a a pair of PR’s for the low frequency chamber of a 6th order bandpass enclosure works extremely well. The trick is actually to get a light enough PR to use in the HF section.