All you need is input into the DAC and the DAC turned on. You don't need the preamp or the amp.
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Interesting concept Tiger. The output of a tuner is analog, and most stations don't broadcast pink noise. Krell is correct, and there are some CDs available specifically for burning in components. I use this often on my system, playing the pink, brown, mono brown and white noise tracks on repeat: (http://www.musicdirect.com/product/73160) Another option: (http://www.graniteaudio.com/phono/page7.html)
Krell_man, thanks for the response.It wasn't clear to me if there was anything to be gained from the DAC "actively" passing a signal in the equipment chain.
Tiger and Rodman99999, I had forgotten that this could be an efficient way to achieve the burn-in. I see a burn-in disc in my future....
Is there a rule of thumb for burning-in a piece of gear in terms of time? Does something like the disc reduce the time necessary, and if so, how much? How does one know how long the burn-in might take, no matter how it's achieved?
The voltages will be constant with a disc/pink/brown/white noise, while with music- it varies widely. A constant higher level will help the dielectrics form their charge faster, thus reducing the necessary time somewhat. Figure two hundred hours for most components. Usually things get listenable after one hundred. Just let it burn when you're not listening.
So is it ok to just use pink noise to break-in ICs, DACs and preamps? If one is just using pink noise only to break-in ICs how many hours with just the Pink Noise before the cables are broken in? Right now I'm breaking in some Morrow Audio ICs and XLRs and not listening to them in my system until after 400 to 500 hours. I'm hoping with just the pink noise the break-in time will be cut down.