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Old 19th January 2004, 07:51 PM   #1
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Default Help! Load capacitor value...

Hi all!!

I have started building a 1000 Watt amp per an article from a French magazine (LED) published back in 1998.

It's all been going well so far, but I now have a few questions that my rather basic skills in electronics have been unable to answer. I hope that you can help:

If you take a look at this schematic, you can see the three outputs for the speakers (Left, Right, and Bridged for when the amp is in bridged mode). Then we have two massive capacitors (C11) of 10000F/100V.

1. What is the role of these capacitors?
2. When in bridged mode, they don't seem to be connected to the system... Is that normal?
3. I have two capacitors of 22000F instead of the 10000F specified. Will they be suitable or will it blow the amp sky high?

I apologise if these are dumb questions
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Old 22nd January 2004, 12:09 AM   #2
moamps is offline moamps  Croatia
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Default Re: Help! Load capacitor value...

Quote:
Originally posted by Frisbee78
schematic, you can see the three outputs for the speakers (Left, Right, and Bridged for when the amp is in bridged mode). Then we have two massive capacitors (C11) of 10000F/100V.
Hi,
this amp has unsymetrical power supply maybe. This mean that output is set to 1/2 of PS and those caps you need to protect speaker from DC. Value of 22000 is fine.
Quote:
2. When in bridged mode, they don't seem to be connected to the system... Is that normal?[/B]
Yes. In bridged mode speaker don't see any DC. 1/2PS - 1/2PS=0

Regards
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Old 22nd January 2004, 12:15 AM   #3
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Wow!
Thanks a lot for the reply.
It's all clear now
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Old 22nd January 2004, 01:17 AM   #4
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...in which case it may sound a hellova lot better in bridged mode...
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