Effects of stuffing on mid-bass (?)

[Scott L]

The bottom line question: Is there a continued positive effect for increased stuffing inside a mid-bass enclosure?

I built a pair of mid-bass enclosures designed to operate 60 Hz- 250 Hz, and was recently informed that my largest dimension of 22.5 inches would produce a peak at approx 250 Hz, which is unacceptable. I tested it with minimalist acoustical material (fiberglass) and sure enough: problems.

So, next I bought a 5# bag of acousti-stuff, divided it in half, and filled each enclosure. The response is now much more even, but there is still a gradual rise in response as the frequncy is increased. So then the bottom line question..... ?

[rastanearian]

If you could add a piece of MDF the shape of a wedge to one of the offending parallel panels, it might break up the standing wave that is causing you trouble. Keep the stuffing as it may counter the slightly smaller internal volume.
The wedge doesn't have to be that big, I think the magic number is 6 degrees from parallel to begin to see improvements.
Someone correct me if I'm wrong.

[Lynn Olson]

For reasons that are not completely clear to me, different acoustical absorbers have a "sound" - not just a tonal coloration, but sometimes a compression of dynamics. For example, acoustical foams can have an unfavorable effects on dynamics (although this result has been purely subjective on my part). My current favorites, in terms of least coloration, has been recycled blue jeans from Bonded Logic and loose, long-fiber wool (although the latter has to be moth-proofed).

[Scott L]

I'm reminded [that] I really didn't want to use much/or/any acoustical absorbent material to begin with. I let my mind wander with a suggestion of placing absorbent material in the center of the enclosure, which distracted me from placing the staggered partitions I wanted to, in the first place.

Thanks, for both replies, as they both have meaning and merit in this particular design.