Marshall JTM45 2245 30-watt Plexi Tube Head.

Why are marshalls called Plexi?

The name originates from its shiny, Plexiglas panel, commonly used on Marshall amps between 1965-1969. ... The 68 specification amps were a hit with Jimi Hendrix, Cream and The Who, creating huge amounts of exposure and marking the 'Plexi sound' as the sound of rock.

What does Plexi mean in plexiglass?

“The term Plexi refers to the Plexiglas [acrylic] plastic panels we used during the 60s,” Marshall archivist Phil Wells tells us, “although we did carry on using them up until the early 70s. “In the late 60s, we started to look at using aluminium panels, like we use today, because it was cheaper.