Trying to understand optimal method of volume control with separates


I recently got a vtv eval-1 stereo amp to go with a topping d90/a90 dac/amp stack which is intended originally for headphones but doubles as a dac/preamp going out to the eval-1.  The d90 dac has volume control with a remote which is great for relaxing on the couch since the a90 amp/preamp only has a knob you can turn by hand but no remote.  I could be imagining things or recovering from an un-diagnosed ear infection but I could almost swear it sounds better having the dac at 100% volume or alternately having the volume knob on the preamp turned up higher with the dac lower.  Is there some optimal combo of preamp voltage and dac volume that fills in the music better somehow? 

I assumed that one multiplies the other and the only thing that matters is the total that comes out into the speaker amp but for some reason it sounds more full/even the other way.  The only problem is when I have the dac at 100% there's almost no room to adjust the volume knob without getting way too loud.  Having the preamp volume knob permanently up higher and setting the dac lower also seems to do the trick but I'm curious if I'm just insane or if there's something to it.
brandini

Showing 3 responses by brandini

Up until yesterday I was keeping the preamp volume at 12 oclock on medium gain and controlling volume with the dac. Sometimes it seemed like it was out of tune or out of balance and not that great sounding at higher volume. If I put it around 2 o clock medium gain but turn down the dac it sounds more normal somehow. Weird.
For the moment it seems that keeping the pre at 2pm medium gain and lowering the dac a bit works pretty well but I'm thinking about picking up a freya+ so I can finally do it right and have a remote.  Hopefully the gain won't be out of control but I can return it if it doesn't work out.
Thank you so much millercarbon I didn't know those knobs did anything.  I turned them and the sound got louder!