Hello!

This is the firs time I write in this forum, first I like to thank You for a very interesting site and I suppose that some of the question I have is there already but I have really tried to find it.

After blowing and burning almost every type of speakers Septon (JBL distributor in Sweden) told me to go with JBL. So in 1977 I decided to build my type of 2-way L300, I am not sure but I think L200 used other element at this time. I used 2231A (136A), 2420 (LE85), 2308 (L91), 2312 (H92) and 3110 (LX13) and bought JBL Enclosure Kit to get help to design the box. I ended up with 4,57 Cubic Feet (128 L) Port 2x3” (2x8 cm) duct 4” (10 cm) tuned for 31 Hz.

In 1992 I had the LF recone with 2235H and last year I had the LE85 diaphrame replaced with D16R2421, I also replaced the caps in the filter.

Problem: I feel that the LF don’t have the same punch and balance any more. To compensate the balance I have to step down the filter to -min and then I lose much HF, I have followed Zlits Quick & Dirty but I am not reedy to change my horn (yet).
Any ideas to go further, there is no short cut to the perfect sound.

Regards