Stuffing PE Boxes

[sdclc126]

Hello,

I was wondering if anyone had any advice on damping/stuffing PE cabinets. Since they are completely assembled with entry only from the front and with the shelf brace inside, access to placing damping materials is somewhat limited.

I am wondering if I can get away with placing the polyfoam in just the back chamber, behind the shelf brace, and using damping and foam sheets in only the front chamber? I'm using the 0.38 cu ft cabs - a little tight inside, and even a little stuffing in the front chamber ends up crowding the rear area of the woofer (if that matters). Also these are going to be sealed cabinets.

Any thoughts?

Thanks.

[ruseriousclark]

Dynamat would save you some internal volume but $$$$. If you are going the accoustical foam route you'll need to consider impact on the internal volume it negates. I'd go with a fill. That should reduce the standing waves. Cabinet that small shouldn't have too much resonance with the brace you just need to eliminate standing and back waves. Heavy poly fill would be my suggestion. If you're set on cabinet treatment then 1/8" dynamat or 3/8" sonic barrier.

[planet10]

Are these the curved cabinets? I've not had any problems getting damping into mine.

Acoustical foam isn't the greatest damping material, but like any damping has the affect of increasing apparent volume.

Is this a sealed box or a vented one?

dave

[speakerdoctor]

Originally Posted by ruseriousclark

Dynamat would save you some internal volume but $$$$. If you are going the accoustical foam route you'll need to consider impact on the internal volume it negates. I'd go with a fill. That should reduce the standing waves. Cabinet that small shouldn't have too much resonance with the brace you just need to eliminate standing and back waves. Heavy poly fill would be my suggestion. If you're set on cabinet treatment then 1/8" dynamat or 3/8" sonic barrier.

I agree here. The highly regarded ($$$) vintage Swiss-made Ensemble Reference is a very small monitor speaker that's jam packed with polyfil.
It's relatively inexpensive and surely worth a try.