Preamp voltages.

[leadfootdriver]

What are the sound differences between a plate voltage of say 165V compared to 267V in a preamp section?

I was thinking about re-doing my little project amp to an express preamp circuit, but the power tranny from the amp I converted was selected originally for 1-12ax7 and 1-el84. I added a 12ax7, and did a Marshall type 3 gain stage with a cathode follower driven tonestack into a fixed bias single el84.

What do you think?

[Phil_S]

Much less clean headroom. Less gain. In an Express type build, I'm guessing it won't sound right. Not that it will necessarily sound bad...just not anything like an Express.

[leadfootdriver]

'Wish I never sold my Crate V30.

[sergio]

THE ULTIMATE TONE , modifying and custom building tube guitar amps of kevin O'Connor , in a proper chapter talk about this.

[leadfootdriver]

THanks fellas.