Question number 1. So I just recently purchased a nice tube pre/buffer for my system that has volume control. Which I am matching to a TPA chip amp that also has volume control. I am also using my Yamaha dac as a pre for volume control as well since it has a remote. So with the tube pre and the tpa amp with volume control, do Imax them both out and use the Yamaha to turn it up and down? Is that stressing the pre and the tpa amp by having the volume turned all the way up? Question number 2. I am getting ready to purchase a SET integrated tube amp which also has volume control. Same question there, do I max out volume on it? Question number 3 Is there such thing as too many tubes in the signal path? Is it redundant to have a tube pre/buffer and have a tube integrated?