aaharvel
01-21-2006, 06:16 PM
The industry standard is to always bypass your subs low pass filter/Xover when setting speakers to "SMALL" on the receiver. This automatically engages the sub's high-pass filter. The problem is that most high-pass designs don't utilize the steeper & recommended 12-24db.per octave slope. Instead less effective 6db. slopes are used. This results in a bass cutoff that exceeds its mandate, & can approach 160hz for a typical fixed 80hz high-pass design.
I say use BOTH xovers. Sure it's possible for complications from running your receivers crossover and the subwoofers crossover simultaneously.. such as bass cancelations or frequency response irregularities- but fiddling with placement and using an SPL meter as your guide should take care of this- and in the end it guarantees that both the primary speakers and sub are prevented from re-producing frequencies that they have no business in reproducing.
I say use BOTH xovers. Sure it's possible for complications from running your receivers crossover and the subwoofers crossover simultaneously.. such as bass cancelations or frequency response irregularities- but fiddling with placement and using an SPL meter as your guide should take care of this- and in the end it guarantees that both the primary speakers and sub are prevented from re-producing frequencies that they have no business in reproducing.