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What's that noise?

I am running a Plinius Tautoro into a Plinius SA103 amp. When I turn the volume to maximum with no input, I can hear low level white noise from the tweeter and a similar but more "jagged" sounding white noise from the mid range driver. I am running the system on a standard household circuit (including outlet) through a Furman Elite 15PFi. What might be the source of this noise? It does not sound like 60 cycle hum.
falconquest

Showing 2 responses by georgehifi

georgehifi's avatar
georgehifi
10,312 posts
 

If this only happens at full max volume rotation, could be the pots wipers are going open circuit, and the input of the next stage (output line amp section) is seeing this open circuit and will be noisy. If this is the case and it’s fine when you back it off from full a little, then don’t worry about it.


Cheers George

georgehifi's avatar
georgehifi
10,312 posts
 
The "noise" does stop just below full volume


Then it could be the pot wiper going open circuit. If it doesn't start playing up elsewhere on the rotation, don't worry about it, as it's looks from pics I saw on Google a motorized one, and isn't going to be cheap to replace. 


Cheers George

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