... How I should set the volume...


Hello to all...

New to me in my system is a vintage Parasound  HCA-750A power amp, which I initially listened to directly using the volume controls on the back. But I am getting ready to experiment with Wi-Fi/ Bluetooth/Spotify, so I've hooked in the cheapo Monoprice 50w tube amp with Bluetooth and Preamp out I was using as an integrated, and am now using it as a preamp/conduit for Wi-Fi...

How should I set the volume on the back of the Parasound: full-on, somewhere in the middle, or virtually off? I'm thinking the full on would be taking a "voice" at full level distortion once it entered the Parasound with whatever distortion is coming in from the Monoprice - correct? With that thought - I should set the back so that my normal (?) listening level at about 10-11o'clock...

Please advise the most correct, distortion-free way to set this up.

Thanks to all...
insearchofprat
Initially, I would set the volume on the amp such that I could use the preamp volume over it's middle range for all loudness levels utilized. Might experiment from there. 
Afterthought, the amp volume controls could be used to balance output when speakers are asymmetrically placed. 
Full on removes more of the volume control from the circuit so it will sound better.