A design for a Vox AC50 trolley (?)

Autumn 1964

On this page, a hitherto unknown JMI design for a trolley from August 1964, probably never put into production. What was it for? The presence of brakes suggests a unit that could put out a considerable amount of bass. Perhaps for an AC50 amplifier section with a new "large box" speaker cabinet containing two 15" drivers? John and George of The Beatles had certainly been provided with such cabinets to accompany their new AC80/100 amplifiers for two concerts in Stockholm in late July '64.

Stockholm, Isstadion, 29th July, 1964. Second picture inverted to show the outlines of the 15" drivers. Further details on the Vox AC100 website.

But it can be seen that the cabs above had more conventional trolleys. The basket top of the one below moreover looks a little too precarious for an AC50 amplifier section, so the question remains.

On the hand-wheels, "VOX" is in old-style cursive script. Selmer later devised side stands for its Thunderbird amplifiers in the form of a Z without a top bar, but it is unlikely that these sprang in any way from the JMI design.

Pictures from autumn 1964.