I’ll have to dig up the manual to check that. But I’ll start digging right away! Thanks!Vladimir said:If the amplifier has DC offset setting on the PCB (small turn pot), you simply hook up your multimeter as before and adjust the pots to get close to 0mV DC reading. I see three blue trim pots on pics of the Hypex NC-400. Can you find out which one is for biasing and which for DC offset?DocG said:I'm a little late to the party, but thanks for pointing me to this issue, Vlad. I use an active set-up, and my power amps are DIY: two good reasons to check this DC thing ASAP.
And it's not as good as I had hoped...
I've built two stereo units. One unit gives 7,2 and 9,4 mV respectively, but the other one reads 19,6 and 20,0 mV.
When building the units, I used one case, one power supply and two NC-400 amplifier modules for each; I split the wiring from PS to amps (artisanal cutting and soldering together, connection protected with a heat shrink).
I never noticed any sound quality issues when listening these past few months -- all crystal clear and tight...
Any suggestions for solving this issue? What to look for when opening the case?
(btw, the speaker wire is not properly twisted on that picture!)