#1
Does anyone know how much it would cost to have a plexi modded with a master volume? I wanna be able to achieve its incredible tone at lower volumes.
#2
Well the pot is like $2 at the absolute most. Thats basically all that you need, but also the equiptment for it (soldering iron, solder, flux, wire, etc...). Then you need to drill a hole so you need a drill and bits. Oh yea, and you need skills to solder and discharge filter caps (unless you want to die )

#3
get an attentuator
Guitars:
Parkwood PW320M
Epiphone Les Paul Standard
Epiphone C-40 willie nelson signature
Squier Strat
Some beat up acoustic from '68

Amps:
Vox Ad50vt
Crate xt15r

Effects:
Vox Clyde McCoy Wah
#5
Saves you time and trouble, and sounds much better.

You won't get great Plexi tone with a master anyways, you need the power tubes pushed.
I'm not very active here on UG currently.
I'm a retired Supermod off to the greener pastures of the real world.
#6
I don't think you want to mod a plexi Marshall. (nor do you have one, no offense)

I think you're talking about modding a non-master volume JMP (or other Marshall) in which case this would also be a bad idea considering you can buy one. Look into Marshall 2203's and 2204's. They have a master volume. Spending the time and money to mod it wouldn't be worth it.