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ianc13 20th August 2007 10:19 AM

Output Noise question

I was wondering whether someone could give me some guidance - I am testing the first of my C3G/PX25 DRD monoblocks and currently have around 2.5-3.0 mV of hum on the output.

This level I can hear through my speakers from my sitting position.

There are a number of bits and pieces that I still need to implement in this monoblock, like screening the input wire and sorting out the star ground for the CLCLC supply.

The question that I have is what is a suitable noise level to aim for? 1.0mV? My speakers are around 97db/M.

Thanks in advance, Ian

AndreasS 20th August 2007 10:33 AM

Hi Ian,

Take a signal with 100 Hz to your loudspeaker terminals and decrease the signal to the level of your choice...

Regards Andreas

ianc13 20th August 2007 10:48 AM

Thanks Andreas,

I never even thought of that :ashamed:

Should be quite easy to test.

Thanks again,


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