Parasound and dCS

[Kelvin_L]

This is what I read a little while ago with the use of 0.6V:

Dac output voltage

The 0.6v setting is primarily in place for use with Airplay. I don’t know of anyone using it for normal listening. You have too much gain in your system for what you’re trying to accomplish using any normal settings so you need a volume control somewhere. You can either use the VC in the REF6 as intended (being close to unity gain isn’t really critical since the VC isn’t adjusting gain, it’s just attenuating the signal) or you can set the REF6 to unity (or theater bypass) and use the VC on the …

So as Pete mentioned, 2V should be right to use with a pre-amp, and 6V is usually required in direct to power amp.