speaker insulation

[james m]

i'm recapping my dlk 2's and when i took the speakers apart i found the insulation rotted and falling apart. i'm thinking about using 3 inch acoustic pyramid foam will this be okay? this speaker is a three way with a port tube. any help would be great. oh and the old insulation stinks like 40yr. old mildew

 

[thomo57]

It's called damping.
There are many products you can use/try.
Rock wool, egg crate foam, polyester fill
What was in there to start with James

 

[james m]

It's called damping.
There are many products you can use/try.
Rock wool, egg crate foam, polyester fill
What was in there to start with James

white foam

 

[Porkloin]

Be prepared to experiment with different amounts of pad. I've found that too much foam actually created a harsh, annoying bass in some "augmenters" that I made for some satellites, but too little can give you a mushy, free of punch and definition bass.I actually wound up using a combination of 2" pyramid (bottom and back) and 1" polyfil (sides and top) to get the timbre that wasn't fighting the satellites. The dual-woofer towers needed 2" pyramids on the back with 1" around the sides, top and bottom.
Unless you've got a giant enclosure, 3" pyramids may put a damper on your versatility (as opposed to 3 layers of 1" pyramids).

 

[Porkloin]

I posted a copy of the David Weems damping tester over here if you'd like a doo-hickey to aid in determining damping amounts.