"Acoust-X" Sound Damping Paint

[mrjim123]

Anybody have experience using this product on a DIY cabinet interior?:
Speaker Cabinet Coating - Acoust-X Sound Damping Coating

I am rebuilding an Avatar 2x10 in order to reduce the weight of the cabinet (if you're interested, here's the related thread: Light Weight Cab Rebuild).

Per Bill Fitzmaurice's recommendation I'll be using dowels on the cabinet inside for rigidity. I originally planned to line the interior with some kind of poly-fill, but the Acoust-X looks like it will be easier to work with. So, does it dampen sound as well as polly-fill?

[will33]

I wouldn't think so. The damping inside the cabinet happens because of the thickness of the open-cell foam. I would think that stuff is more for quieting down an office space, keeping engine noise out of a car interior, etc.

[will33]

In short, the mattress pad or quilt batting is cheap, proven to work well, and weighs nothing.

[mrjim123]

Originally Posted by will33

I wouldn't think so. The damping inside the cabinet happens because of the thickness of the open-cell foam. I would think that stuff is more for quieting down an office space, keeping engine noise out of a car interior, etc.

Well, the linked page says that it "helps reduce unwanted bounce back", which, I thought, was the primary reason for lining the interior to begin with. As I understand it, bounce back is the adverse effect that reflected mid frequencies inside the cabinet have on accurate production of bass frequencies.

[someparts]

You've been sold.

I don't buy it though.

[mrjim123]

Originally Posted by someparts

You've been sold.

Not yet, hence the original question.

[billfitzmaurice]

Originally Posted by mrjim123

. So, does it dampen sound as well as polly-fill?

No, not even close. It's OK for reducing vibrations of car doors.

[mrjim123]

Thanks, Bill. Poly-fill it is, then.

By the way, I'll post a build thread with pics for all you interested DIY'ers.