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Cutting below 80 HZ on my mains, so subwoofers handle deep bass?

Sorry in advance if these are obvious questions.

I recently picked up two Rythmik L12 active subs to go with my Tekton Lore towers (10" full range driver with super tweeter). The Lores do an admirable job with deep bass (down to 30 HZ) but the L12s destroy them in quality and depth of the low-end.

The towers and subs use separate pre-amp outputs, but share one volume control. The subs are set at 80 HZ and below. Because the towers and subs currently share a lot of the same frequencies (which can potentially cause the bass to be overwhelming) is it possible to add an external crossover style device to cut 80 HZ and below from the main towers? It may improve the mids and highs if the tower drivers aren’t working as hard? And the sound may seem cleaner with greater instrument separation?

Thanks!
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Showing 1 response by bdp24

bdp24's avatar
bdp24
10,096 posts
 

If a 1st order filter (6dB/octave) will suffice, the most transparent way to do it is with a single capacitor on the power amps input jacks. The corner frequency of the filter is determined by 1- the value of the cap, and 2- the input impedance of your amp. The formula for determining the cap value is available via a Google search.

If a steeper slope is desired, an active x/o will be required. The First Watt B4 is a great value, providing 1st/2nd/3rd/4th order filters in 25Hz increments from 25Hz to 3200. Built with all discrete components, no Opamps or IC's. 

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