Hi. I would apprechiate any help on I guess, quite basic question. Is the dc offset measuring procedure the same for integrated and power amp, or do I have to do something diferent when checking power amp offset? May I just power it on with no preamp and speakers conected and measure offset on sp terminals, or... ? Thank you.
You should short the input.
Depending on the topology, an open input may cause DC offset that disappears with a source added.
If you have a coupling cap at the input, it isn't necessary.
Jan
Depending on the topology, an open input may cause DC offset that disappears with a source added.
If you have a coupling cap at the input, it isn't necessary.
Jan
It is Bedini Classic 100, monoblock version "clone". If I remember corectly it has basicly the same topology as 25/25 and that amp has coupling cap on inputs. It's 15 years since I did any diy project, not shure about anything anymore. Thank you.
With an integrated amp the volume control could be an issue so check with volume at zero and max. Usually they have coupling caps to reduce or eliminate dc offsets, but those caps are known to leak after time and the offsets return.