Serviced by Jeff Bober Marshall Plexi JTM45. Brought back by Steve from England in the 1980s, he kept the most intriguing amps in storage for the past forty years. Jeff replaced filter caps, replaced bias caps and resoldered a few solder joints- a minimally invasive approach to preserving the distinctive character of this legendary circuit. Bias, Bench and Sound checked by Jeff Bober who did the majority of our service work since the 1980s. Ready to go. Look at the photographs for a detailed look inside and out.