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Old 14th April 2005, 05:01 PM   #1
SM7UYJ is offline SM7UYJ  Sweden
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Default How feed 4-6-GainClone monoblocks?

Hi,
In our "hobby" room I plan to use 4 or 6 GainClone monoblocks (LM3875 or 3886). The source will be a CD player for 'normal' use and a computer for playing mp3's during party time.
Any good suggestions for a DIY PreAmp that can drive all these amps?

/RC
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Old 14th April 2005, 05:05 PM   #2
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Check out this thread:
GC Preamp Suggestions
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Old 14th April 2005, 07:27 PM   #3
SM7UYJ is offline SM7UYJ  Sweden
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Tnx!

Alot of information, but not quite what I'm hoping to find!(or did I mis it!?)

The ideal would be someting like this:

- Input run via a single stereo potentiometer.

- Number off outputs scaleble for 4, 6 ,8 amps (10k/1V each)

- No filtering and minimal gain

I'm using non inverting GC's. Perhaps the gain is enough for a passive "PreAmp" to split the input signal to at least 4 amps ?

/RC
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Old 14th April 2005, 07:53 PM   #4
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I've only build a couple GC's, but from what I have read, it is best to add a buffered preamp, even with unity gain, to prevent occilations. If the preamp in that link is made with the OPA627, I believe it would be best at unity gain. Some of the later designs are for just such an application, where you could have a single pot, then as many mono preamp channels as needed running of a single supply.
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Old 14th April 2005, 09:03 PM   #5
SM7UYJ is offline SM7UYJ  Sweden
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Super!
Thanks for the info!
There were som more pages in the thread that I missed!
It's aperantly time to stop working on my Zen v4, and get bussy reading the 30+ pages of info!
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