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Old 26th March 2013, 07:48 PM   #1
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Location: The Great Smoky Mountains
Default Promise not to laugh?

I want to bag my plate amps (one broken, the other sucks) in a pair of subwoofers. I'll drive them with a stereo amp I have from the second outputs of my pre-amp.

I know I can easily build a circuit, I just don't know the terms or where to go for info. Tried a 2-way crossover designer, input 4 ohm woofer and 90 Hz crossover with second order (12dB slope) Butterworth. That much I know if it were a 2 way.

Can I just use the woofer part of the circuit and put a big, 10mH coil in series and great big, 312mF cap across? Can it be that simple?
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Old 26th March 2013, 08:14 PM   #2
DaveG is offline DaveG  United States
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that will work.
You will need some way to adjust the signal level input to the woofer amp.

And you might want to consider a line lever crossover between the preamp out and amp in.
Either passive line level or a simple 1 op amp active crossover. It will be a lot easier to adjust the frequency and slope if you want to try different options.
search esp crossover projects
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Old 26th March 2013, 08:17 PM   #3
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Yes, yes it can...........In one 'experiment' I had a 12" DVC sub, built the enclosure @ 24 cu ft...!!! & a pair of 10mH high current $$ coils..........sounded great.
I promptly disassembled (busted up) this sub..kept the second one(Isobaric push-pull idea).......the 'original' is gathering dust.

__________________________________________________ ___Rick.......
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