EPI 150's

[Sansui Louie]

the issue with rubber is after 40 years they can stiffen considerably, and some have even cracked....new foam is better than cracked rubber. and even if it isn't cracked, if it's hardened and become stiffer, that can raise Fs and reduce bass output on the bottom octaves.

Well... I don't think I'd want more bass on these. They're not cracked, they're pliable and they sound great. If it works, don't fix it.

 

[poppachubby]

Just joined the club today. Thrift score, turns out they are 100s. I will comment again once I have sat and had a good listen.

 

[FauxHall]

Would you mind posting the schematic, parts sources and photos if you took any?

The replacement capacitor is easy and covered by others. The bracing and dampening I did on the EPIs is very similar to these photos for an Infinity RS 2.5 cabinet.

http://groups.yahoo.com/group/InfinityClassics/photos/album/310229155/pic/list

The cabinet for the 150s is pretty stout already but I added cross braces between the front near the woofer and the back panel. Try not to make symmetrical shapes or areas of the resultant panels so that they resonant at different frequencies.