Subwoofer crossover question - AVS Forum
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post #1 of 5 Old 09-03-2014, 05:08 AM - Thread Starter
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Subwoofer crossover question


I'm using a pair of JL Audio e-sub 112. When I run a frequency test say 50hz, and I adjust the subwoofer crossover frequency to 40hz, the sub still produce frequencies.

Is this normal? should't the subwoofer only play 40hz and below?

The test tones I'm using are from the SoundDoctor CD.

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post #2 of 5 Old 09-03-2014, 05:15 AM
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Generally speaking, subs should handle content below 80Hz.

(Audyssey routinely sets the crossover settings in my AVR to 40Hz for all speakers. I always bump them back up to 80Hz.)

Last edited by eljaycanuck; 09-03-2014 at 05:34 AM.
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post #3 of 5 Old 09-03-2014, 05:18 AM
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Crossovers aren't a brick wall, so frequencies above the crossover will still be heard, they should be at a reduced volume, however you may have a peak above your crossover so the room is effecting the crossover slope.

Krell Evolution 900e x 7

Bose Jewel speakers.


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post #4 of 5 Old 09-03-2014, 10:17 AM
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post #5 of 5 Old 09-03-2014, 12:43 PM
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^^^ Actual numbers depend upon the crossover design, of course. That said, an excellent plot to illustrate hoe sound does not immediately die way on either side of the crossover. This is also why getting the subs in phase with the mains at the crossover frequency is important to prevent cancellation of sound.

"After silence, that which best expresses the inexpressible, is music" - Aldous Huxley
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