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Electronic cross-over on pre-amp out, to split signal to subwoofer and bookshelf speakers

I have a 50 W amp for 86 dB bookshelf speakers.

I really want to keep both amp and speakers.

My idea is to have an electronic crossover on preamp out, split the signal say at 80 Hz - Send the lower electronic cross over out to a subwoofer.  Send the high crossover out to my existing 50 W power amps.

This would extend speaker frequency range to subwoofer capability - say 25 Hz, reduce the power amp load and allow to play the bookshelf speakers a bit louder,/ have more headroom.

I am sure others have already done.  What cross over did you use?  Was it successful?

dcaudio

Showing 1 response by sfgak

sfgak
156 posts
 

Check out Sublime Acoustic. They make two different levels of crossover unit, the K231 and the K235. Lovingly crafted in Northern California.

The one issue that some people complain about is that to change the crossover point, you need a small card they provide, with precision trimmed resistors on it. A different card for each frequency. You get two with the purchase, and the rest are just $10 each. 

I have a set from 50 Hz to 80 Hz in 5 Hz increments. They are easy to change out, and crossover points are not something you want to A/B quickly, anyway; you need to listen a while with each choice in the system. I really don’t find the slow change-out to be an issue.

I find the units to be very reliable and transparent.

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