"I'm popping jokes over here, man.................."
OK I'm down wit dat, peace man. Misunderstandings on line come easily.

I had foam edges on some speakers but something caused them to get brittle and disintegrate. A few of them went bad while in their boxes having never been used. I'm real skeptical about foam edges these days. It may simply be something in the air they do not agree with. It has happened to some of my woofers and some squakers, 8 in all.
I liked my Echoplex a lot in its day. They sounded fairly quiet for a unit that didn't have any type of noise suppression to subdue the tape hiss. Had they used commanding or noise reduction circuit more people would probably still be using them. Although a commander or a simple dynamic noise reduction system could be easily added.
I made a dynamic noise reduction system for my video tape player. National Semiconductor makes a chip for that purpose that needs only a handful of external components. I designed mine so it could be switched in and out with a mini toggle switch. It is a National Semiconductor LM1894N chip and most likely you can find the circuit on line. It takes only 17 components in all including the LM1894N. It did make a great deal of difference in the amount of hiss from my VCR tapes. They went from crappy to tolerable. How about this, I found it for you.
http://www.alldatasheet.com/datasheet-p ... 1894N.html