Have a 34I.5 Rachel amp and a McIntosh C22 v4 preamp.  Would like some guidance on how best to set up the volume settings, so that I don’t have to mess with them all the time.  The Rachel has dual volume controls, one for left and one for right.  Thanks for any help.

I run a CSP3 preamp into my ZMA power amp. I like the ZMA at full volume attenuated by the CSP3 volume at a lower level for a harder or more punchy sound (think hard rock, but not limited to that genre). For softer music, especially with prominent female vocals, I like to turn the ZMA down to about 40% volume or so and increase the overall volume with the CSP3 at a higher level.

All in all, the music all sounds good at either setting, but I've come to prefer certain setting with certain albums. Essentially, just experiment until you like it. Sometimes this can lead to tweaking while the music is playing, which can be distracting from simply enjoying the music. For non-active listening, I usually just use the ZMA-up/CSP3-down setting as my default.

Man, I was going to pretty much hit a combo of those two approaches... now I don;t have to! LOL\
\
I think all these responses are great at illuminating the different approaches. I just also would throw in to be flexible with your approach. You may find that one approach works great now, but if you never play around with it after that, you may miss out on different aspects of the sound that unfold as the amp starts to break in long after the tubes are broken in.

You guys' setups sound amazing btw!