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Title: Setting DC Offset Post by: briefremarks on November 30, 2015, 03:54:56 am Sorry if this is old ground, but having just acquired the NOS 1a, I am still trying to make it sound as best as it can. The DC offset reads +04.7 and -07.0, which I am assuming is outside the recommended +/- 20 mV. I have tried various attempts at turning off/on Switch 2, and the DAC itself. Always the offset remains as shown.
Is there something else that anyone has tried that I am overlooking? Thanks for the help. Ramesh Title: Re: Setting DC Offset Post by: acg on November 30, 2015, 09:05:27 am Sorry if this is old ground, but having just acquired the NOS 1a, I am still trying to make it sound as best as it can. The DC offset reads +04.7 and -07.0, which I am assuming is outside the recommended +/- 20 mV. I have tried various attempts at turning off/on Switch 2, and the DAC itself. Always the offset remains as shown. Is there something else that anyone has tried that I am overlooking? Thanks for the help. Ramesh Hi Ramesh, You should have the original dc offset numbers that Peter would have sent out when the dac was purchased. They are unique for each dac...so find those numbers first and then see if the numbers you are getting are unusual for your dac. Regards, Anthony Title: Re: Setting DC Offset Post by: nik.d on November 30, 2015, 09:18:42 am Above figures are more than perfect. It is +4.7mV and -7.0mV only. Very, very low level of DC at output.
Normal DC, or allowed, expected or 'worry-less' values are in range of up to -20.0mV or +20.0mV. George Title: Re: Setting DC Offset Post by: PeterSt on November 30, 2015, 09:28:16 am Hi Ramesh,
The DC Offset of your NOS1a as we measured it over here was +05.2/-06.2mV This is when cold and when warmer (this is already after 30-60 seconds) it can vary a few mV. So all is super fine. Regards, Peter Title: Re: Setting DC Offset Post by: briefremarks on November 30, 2015, 10:20:02 am Thanks everyone, and thank you Peter. I will write up on my listening impressions in a short while. I'm using the Linkwitz Orion speakers, and also completing the LX521 in a few days. 8 channels fo chip amps.
Title: Re: Setting DC Offset Post by: PeterSt on November 30, 2015, 10:26:15 am Ramesh, that looks great !
Please consider to put that in your Sig, like we all do. Then it is more easy to help out with ideas or problems. Don't connect the amps to the wrong channels ! :) Peter |