What is an ABC box?

Bill T.
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Dual chamber/ported enclosure.

The chamber where the sub is, is exactly 2 times bigger than the empty chamber. 3 ports, 2 firing out and one connecting the sub chamber to the empty chamber. Whatever the sub chamber is tuned at, the empty is one octave higher than it. (ie: sub chamber is 30Hz, empty will theoritically be 60Hz).

Bill T.

 
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