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Old 9th March 2007, 02:58 AM   #1
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Default 1 output, 3 amps

I would like to triamp my speakers, but only have one output from my preamp. I was wondering if I could just build a simple project with one input and three outputs. Just using some RCA jacks and connecting them together. Is ther anything to consider when doing this?
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Old 9th March 2007, 04:14 AM   #2
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If you are using crossover components in the speakers you could do that, you should probably use a buffer though instead of directly splitting the output.

it depends how much the preamp can drive and what the input impedance of your amplifiers are.

if you do not want to use any passive crossover components in the speakers then you would need to put a 3 way active crossover there.

here is a fairly simple one that would use 6 dual or 12 single opamps.
http://sound.westhost.com/project78.htm
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Old 5th May 2007, 12:43 AM   #3
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Quote:
Originally posted by neutron7
If you are using crossover components in the speakers you could do that, you should probably use a buffer though instead of directly splitting the output.

it depends how much the preamp can drive and what the input impedance of your amplifiers are.

if you do not want to use any passive crossover components in the speakers then you would need to put a 3 way active crossover there.

here is a fairly simple one that would use 6 dual or 12 single opamps.
http://sound.westhost.com/project78.htm


How would I add a buffer to this?
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Old 5th May 2007, 12:52 PM   #4
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Quote:
I would like to triamp my speakers, but only have one output from my preamp. I was wondering if I could just build a simple project with one input and three outputs. Just using some RCA jacks and connecting them together. Is ther anything to consider when doing this?
This would be a better route IMO
http://www.sound.westhost.com/project09.htm
a L/W 24db/octave
will require 2 boards for stereo tri-amping-buffers included,PC boards available---
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Old 6th May 2007, 01:04 PM   #5
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Whin I use this, how do I bypass the internal crossover?
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Old 6th May 2007, 03:29 PM   #6
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Quote:
Originally posted by Nappyhead
Whin I use this, how do I bypass the internal crossover?

Remove the crossover components from the signal path by connecting the drivers directly to the terminal posts except for the tweeter ............

For the tweeter I recommend adding a series capacitor of at least 5uF (but preferably larger) to protect it from damaging D.C. that may cause you problems. A smaller cap would work but will interfere with your new (active) crossover curve.

You should also check that your mid range and tweeter amps are not putting out any significant D.C. that might damage your drivers when unprotected by a conventional passive crossover.

Regards,
Martin.
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