|21st May 2008, 11:01 PM||#11|
Join Date: Sep 2003
Location: Sunny Tustin, SoCal
Vented boxes in particular
Vented boxes (and open baffles) in particular benefit from high pass filtering. You can put the filter low in frequency, as much as an octave below the F3 and still achieve benefit (especially with higher-frequency tunings like 70Hz).
The problem is that the driver will move freely below tuning, so only a little energy is required to exceed xmax, and so you're getting all the negatives of large cone excursions without any usable output.
These folks have a few good solutions for bass filtering, at very reasonable prices.
I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!
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