Any self-respecting power-amp will reject DC, unless you remove caps yourself.
No input caps in my power amps but it runs both positive and negative bias and manages to eat the DC regardless. A nice design that eliminates the input coupling cap.
No caps in the speakers either. Not anything there because the amps are direct connected to their respective transducer. All electronic filters are passive line level at the input to the amps but the only caps in series are for the HF channel which is 10kHz+. There is an single ended output transformer for each channel though, which should also be useful for sorting out DC that does make its way through the amplifiers.
At the moment the preamp is cap output coupled, which should also sort out DC.
So Anthony, and others, if you'd be able to engage Phase Alignment (which I don't know at this time) speakers not connected !!!, set the values as the ToolTips will teach you, and check with the multi meter for DC (for the NOS1, just read out the meters so you can see the applied DC is operative - for other DAC's measure the output of the DAC with the multimeter). No DC at the output of the Poweramp(s) ? then go for it. Connect your speakers and listen. Mind you please, THIS can not go wrong, as long as you measured and deem it OK.
Nothing can go wrong.
My speakers are active too, but six ways each side, and how to check that for DC? First off I could check the output of the preamp to see if DC gets through there, which should be impossible. Then set up dummy loads on the 6 channels of one side and set up 6 multimeters.
I'm very tempted Peter, but the possible loss of software functionality has me a little worried. Then there is the issue of my MachII randomly getting hot and turning itself off during the day...not sure how this involuntary reboot would affect what DC is pushed into the system. At the moment you cannot tell when the MII shuts down (no noise) but occasionally when windows reboots there is a soft thump through the speakers...not all the time.
Anthony
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