How feed 4-6-GainClone monoblocks?

SM7UYJ · 14th April 2005, 05:01 PM

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

BrianDonegan · 14th April 2005, 05:05 PM

Check out this thread:
GC Preamp Suggestions

SM7UYJ · 14th April 2005, 07:27 PM

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

BrianDonegan · 14th April 2005, 07:53 PM

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.

SM7UYJ · 14th April 2005, 09:03 PM

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!

14th April 2005, 05:01 PM	#1
SM7UYJ diyAudio Member Join Date: Dec 2004 Location: Staffanstorp	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 __________________ The probability of someone watching you is proportional to the stupidity of your action. - A. Kindsvater

14th April 2005, 05:05 PM	#2
BrianDonegan diyAudio Member Join Date: Dec 2004 Location: Rock Ridge	Check out this thread: GC Preamp Suggestions __________________ Twisted Pear Audio

14th April 2005, 07:27 PM	#3
SM7UYJ diyAudio Member Join Date: Dec 2004 Location: Staffanstorp	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 __________________ The probability of someone watching you is proportional to the stupidity of your action. - A. Kindsvater

14th April 2005, 07:53 PM	#4
BrianDonegan diyAudio Member Join Date: Dec 2004 Location: Rock Ridge	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. __________________ Twisted Pear Audio

14th April 2005, 09:03 PM	#5
SM7UYJ diyAudio Member Join Date: Dec 2004 Location: Staffanstorp	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! __________________ The probability of someone watching you is proportional to the stupidity of your action. - A. Kindsvater


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