Marshall JMP-1 preamp in good condition, usual data knob skipping normally associated with these units is minimal but present. Fully serviced by Steve Dawson from Root Two in 2022

(I ended up working for Marshall from 2005-14 as an electronic design engineer. I designed and brought out some highly regarded amps in my time there, such as the ‘Astoria range’, ‘Class 5’, the ‘Vintage Modern’, ‘JMD range’ as well as various reissues from their back catalogue like the Hendrix ‘Super100JH’ and 2012 anniversary ‘Bluesbreaker’ and more.) from Steve’s bio