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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 audiorusty

audiorusty
307 posts
 

Not sure why you would use a Y connector in your set-up?

At a minimum an electronic crossover will have 2 inputs and 4 outputs. Every powered sub that I have seen have both a left and a right input. You would connect your preamp outputs to the crossover inputs, then 2 of the crossover outputs to the sub inputs and the other 2 crossovers outputs to your main amps.

This will give you a little more overall output SPL, but the 80Hz crossover point may still be too low to get the SPL you want.

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