Overview: Historical, Tone and Tech Talk From the Chairman Congratulations on your purchase of this handwired re-issue of a model 1959 100 Watt, all-valve, Super Lead head. The original versions of this world famous amplifier - nicknamed the ‘Plexi’ because of its front panel material - were produced from late 1965 to mid 1969 and are now extremely rare and highly collectable.
OUTPUT TRANSFORMER MAINS TRANSFORMER Tone Circuit: In typical Marshall fashion, the shared tone network of this handwired 1959 re-issue is post gain, passive and interactive - the latter simply meaning that the settings of the Bass and Treble controls affect the amount of mid-dip available via the Middle control. Tonal Note 2: The Middle control is a 10% log pot, unlike the linear one found in the regular production 1959SLP.
Chassis: We are using a box-section chassis made from 16 gauge mild steel with butt-welded corner 10 12 11 13 1959HW Front Panel Front Panel: Extra thick, gold coloured Plexiglas (actually Perspex, causing some people to refer to it as ‘Perplexi!’) - exactly as the original. Specific details pertaining to the front panel features can be found on page 5 of this manual. 1 2 3 4 5 Rear Panel: Once again, gold Plexiglas - just like the original we referenced. 1.
12. HIGH SENSITIVITY INPUT FOR CHANNEL II This is the ‘low sensitivity’ guitar input for Channel I. It is 6dB lower in volume than the ‘high sensitivity’ input and has a darker sound as well due to its significantly lower input impedance. This is the ‘high sensitivity’ guitar input for Channel II, the so-called ‘Normal’ channel. Interesting aside: Back in the day, a ‘high sensitivity’ input jack was recommended for use with a guitar loaded with low-output pickups (e.g.