Best way to decrease the internal volume of a sealed speaker?

+1 Audiotweak

Best cutting edge advise so far

The last thing you want is flexible materials. They will increase your internal volume.

If you want to permanently increase it, and don't have room for the usual brick / wood block ideas I suggest a 2-part mixable epoxy that dries hard.

You may also experiment less permanently with buck shot. Placed in bags it's relatively easy to arrange and move.

Styrofoam will do exactly what you need it will  not absorb no need to coat it and best of all you can infinitely tweak by cutting off material  until you have the correct volume before you make anything permanent. 

Best of luck

Peter

ivan_nosnibor,

Thank you for that info. I was thinking of just using the flex seal over the Styrofoam IF the Styrofoam alone would act as an absorbent. But it sounds like it does not.

theaudiotweak,

I will order some of the Cascade to be used as a inside lining.

eric_squires,

Wouldn't a mixable 2 part epoxy require putting it into some type of mold? What type of thickness do you suggest?

pbn,

Not sure what type of Styrofoam thickness I should be using. I was thinking 2-4", does that sound about right? I'll try Hobby Lobby first.

ozzy

Best way to decrease the internal volume of a sealed speaker?

Liquid Nail a few bricks at the bottom, will make them feel heavy and expensive.

Cheers George