A) What is its purpose?

B) Is it essential for an enclosure?

C) If I have already built the box to a specific internal volume, will the addition of polyfill alter the response - ie. does the polyfill have to be factored in prior?

D) What is the rule of thumb for determining how much polyfill to use?

All explainations & info welcomed.

Thanks,

Blu

b) No but a little in there can make the box a little warmer sounding - it takes away some of the 'bonk' caused by the cabinet.

c) Well, you can factor in poly if you purposely need to make a box too small. The best method is to add and remove poly a little at a time until the box sounds best. It takes a while but is worth it.

d) This varies a little but common practice is to start with one pound per cubic foot and add or, generally, remove from there.

If using a vented box, buy the batt type (for blankets) rather than the ball type (for pillows) and simply line one or 2 walls with it using glue and staples.

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And that's the bottom line, cuz:
LORD DUKK SAYS SO!

The Big Show
The Dukk says: Know your bass: PORT your damn box!!
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