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Date: March 25, 2003 at 06:53:49
From: djk, [tc005.cedar-rapids.net]
Subject: Free Lunch ?


> i was wondering if anyone has built or knows
> how to build a small horn subwoofer. i saw
> the huge one that was in the buildups and
> was interested if you could build one of a
> smaller scale for home use or if it would be
> practical. any info would be appreciated.

Ain't no such thing.

Draw a sine wave on a piece of paper. Notice the peak amplitude is at 1/4Wavelength?

The minimum depth of a horn must be 1/4W of the lowest frequency you intend to run through it. The mouth must be 1/4W per side. The mouth may be half size if the horn sits on the floor, but only if the floor is concrete (bass goes right through sheetrock walls and plywood floors).

30hz?

No problem!

(1130/30)/4 = 9.41ft

If in a concrete corner it may be 56.5" X 28.25", but it still needs to be 113" long (9.41ft).


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