I have just constructed a pair of bass boxes each using a pair of 2235H drivers. The boxes are about 15 cu ft each and tuned to 20 Hz.

Am using them with 2450/2380A mids and 2404 baby bums. For my main system I have used active xovers (JBL M553). Am pretty happy with the result.

Now the query.

I also wish to use these speakers as part of a theatre set up using passive xovers and a surround processor amp. It is not practicable to use my main amps in the theatre set up. I have some JBL 3110s and was planning on making my own HF networks. Can anyone give me advice on how to add passive equalization for the 2380A CD horns?