Radfordman
pfm Member
My recently acquired Proton 520 integrated amp sounds very good. It is similar to NAD amps of the same vintage, I believe that NAD’s were actually made by Proton.
I have a problem, one output channel as it has a DC offset of around 300mV, and the other channel is fine, close to zero. I have tried adjusting the offset adjustment pot for the 300mV channel, but can’t get in any lower.
I would like to fix the problem eventually, anyone any ideas?
But I am considering putting some large value electrolytic caps back to back (to make a bi-polar capacitor), in series with the loudspeaker outputs, so as to protect the speakers.
I have got plenty of suitable capacitors, for example 6,800uf 80v
I have a problem, one output channel as it has a DC offset of around 300mV, and the other channel is fine, close to zero. I have tried adjusting the offset adjustment pot for the 300mV channel, but can’t get in any lower.
I would like to fix the problem eventually, anyone any ideas?
But I am considering putting some large value electrolytic caps back to back (to make a bi-polar capacitor), in series with the loudspeaker outputs, so as to protect the speakers.
I have got plenty of suitable capacitors, for example 6,800uf 80v