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Old 13th August 2008, 08:55 PM   #1
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Default C Audio pro amplifiers

Hi folks. I've got a pair of blown PA amps and I am trying to find the schematics. I have tried a google, but nothing, so perhaps someone here can help...
The amps are made by C Audio, model CA4. Looks like something from the mid eighties.
Much appreciated.
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Old 14th August 2008, 09:01 AM   #2
burbeck is offline burbeck  United Kingdom
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hi there,
are you sure the amps are C Audio and not Crest Audio?
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Old 14th August 2008, 09:59 AM   #3
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I believe it is a Crest amplifier too. The schematic is available online at the crest website.
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Old 14th August 2008, 10:34 AM   #4
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Thanks for reply. I am sure it is C Audio, out of Cambridge in England. I have heard they no longer exist and maybe they were bought up by either Crown or perhaps Crest Audio. I looked at the CA series amps at the Crest web, but they are not the same. The CA4 model I have are old-school mid-80s type with a huge transformer and probably weight 30lbs or more. They are 400watt/8ohms per channel with bipolar output transistors. I dont think they are older than this because they have a TL071 opamp in the circuit. (Not that I know when that opamp was typical)
I guess I can T/S these amps without the schematic, but it would make it easier.
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Old 14th August 2008, 11:20 AM   #5
burbeck is offline burbeck  United Kingdom
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hi there,
you are correct C-Audio no longer exist.
we have an expert for these amps on the forum Lee Basham,
do a search on this forum for that name, possibly send him an email
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