The sound of this amplifier is “creamy” and “warm”. This amp is more suited for blues players, with a smoother sound.
After the off-center prototype came the first production JTM45 amp heads, the first 40 made had a full white Vynair cloth fronts with smooth black tolex,metal logo, RS transformers, large black choke, leather handle and black pitched top Bulgin knobs.
The letter B was skipped because the letter A was used for 18 months and the letters I, O and Q were also skipped to avoid any confusion being mistaken for numbers.
I won’t write the rest because it may confuse you even more. It’s important to note that, for example, a 1959 amp has nothing to do with the The JTM-45 JTM-45 with “block” logo The first Marshall ever made. The front panel has “Presence”, “Bass”, “Middle” and “Treble” controls, as well as 2 volumes and 4 inputs.
From July of 1969 until September of 1992 the date code system included a letter of the alphabet in the serial number.
Here are the letters with their corresponding years.
From July 1969 to December 1983, the letter denoting the year was put after the serial number.
For example: S/ 15679 E S/ would indicate the model which is 50 watt 15679 is the serial number E indicates the year 1973 From January 1984 to October 1992 the date code letter was put before the serial number.
For over 50 years, Marshall has been a household name throughout the world, as a symbol of precision acoustic engineering.