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Can I add a subwoofer to a stereo system that has no subwoofer? Answered

I have a stereo system that has a left and right speaker that connects to the main part of the stereo (CD player and the radio).
I was wondering if I could disconnect the speakers, from the CD player itself, and make a circuit that amplifies a low sound bass, then connected to a small subwoofer.  (Instead of a normal amplifier that just makes treble sound louder.) Then reconnect the two speakers so the final result is that there is an amplified subwoofer.

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alpe_97 (author)2011-11-30

Well I am not going to use amp to run treble speakers. I'll use a 'y' audio splitter. One from the CD/Radio to the speakers. The other audio splitter will go to amp which will go to small subwoofer. (The stereo is actually pretty small!) I don't know the subwoofer (3 inch would do very fine)

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steveastrouk (author)2011-11-29

Yes, that's perfectly possible, you can even do it with a passive crossover, but an active one is much better.

Here's a typical example.

As you can see, electronically, there isn't much to it.

I'd buy a nice meaty amp block from Velleman to do the power driving - when I replaced my passive crossover, I couldn't BUY the bits to make an amp for the price they were selling them for !!

Steve

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thegeeke (author)steveastrouk2011-11-29

+1

The only problem you might run into is that your amp may not be strong enough to handle both the speakers and a woofer.

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steveastrouk (author)thegeeke2011-11-29

If you use an active crossover, like the link, you need an extra amp for the sub anyway.

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thegeeke (author)steveastrouk2011-11-29

That's true. But if you are using passive, you still might overload the amp. I should have clarified.

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