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Old 14th January 2008, 11:08 PM   #1
Code is offline Code  United Kingdom
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Default White Noise, Protruding woofer

Charlize (TA2020)

After removing both input caps and redirecting source ground to the biascap, I am now getting white noise and a protruding woofer from the left channel.

Any advice would be appreciated.

Edit: Just noticed a barely audible hissing from the right tweeter
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Old 15th January 2008, 08:22 PM   #2
G4ME is offline G4ME  United States
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the protruding woofer, would be a DC offset on the output, not sure what would be causing that, are you using a full bridge or half bridge design?
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Old 16th January 2008, 07:31 AM   #3
Puffin is offline Puffin  United Kingdom
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Why have you removed the input caps ? Do you have any pics ?
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Old 16th January 2008, 11:10 AM   #4
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Are your power supplies isolated from each other?
You need to have either source or amp on battery only when in use. No ground continuity.
Also, does your source have any DC on it's output? The caps block DC in as well as DC out so anything coming in will mess up the bias.
I've managed to get a Charlize (with PSU) running from an Ipod (on battery) without any issues using the same method.
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Old 16th January 2008, 04:38 PM   #5
Code is offline Code  United Kingdom
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Ahh, works fine with my mp3 player!

Quite strange as the amp PSU wasnt connected to ground anyway, not to worry, Ill cancel the replacement Charlize and buy a quality battery setup

Cheers fellas
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Old 16th January 2008, 05:26 PM   #6
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Quote:
Originally posted by Code
Ahh, works fine with my mp3 player!

Quite strange as the amp PSU wasnt connected to ground anyway, not to worry, Ill cancel the replacement Charlize and buy a quality battery setup

Cheers fellas
Good to hear it's sorted code

Just to clarify my point a little.... The two units cannot share the same power source; as in the ring main of the house. If so there is continuity of the blue return ground through the plugs. Not the safety earth
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Old 16th January 2008, 06:02 PM   #7
Code is offline Code  United Kingdom
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ahhh

thankyou
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