Fred wrote:

Its purpose is to reduce standing waves within the enclosure that would
affect the frequency response. This applies to mid-to-high range of the
audio spectrum. I don't think distortion is an issue.


At lower frequencies where standing waves and reflections aren't an issue
because the enclosure dimensions prevent them anyway, the addition of
damping material will increase the enclosures effective size

How many 15 foot subwoofer boxes have you ever seen? It's not about
"standing waves", unless you're building a full range box.

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