List of updates / new info. on Vox solid state amps (1967-1972).

August to December 2023

29th December

Thanks to Will, pictures of JMI Wah serial number 6280, now incorporated on the .

Vox (JMI) Wah, serial number 6280.

24th November

Coming shortly, coverage of the "Vox Sound Limited" catalogue of late 1971. This was produced to accompany the Russell Hotel Trade Fair in August and encompasses the short-lived "Slave Master" range along with much else. Text throughout is in English, French, and German.

The loose-leaf format (with removable plastic spine) had previously been used by JMI, notably for its 1964 catalogue.

vox defiant vsl

VSL catalogue of late 1971.

Vox Catalogue (Catalog), February 1964

JMI catalogue, 1964.

18th November

Thanks again to William, some great pics of the electronics of "Vox Sound Limited" - extremely useful to have date codes at this point in production. The amp was probably ready for sale at some point in the third quarter of 1970.

vox defiant vsl

vox defiant vsl

16th November

Thanks to William, a couple of pics of a nice "Vox Sound Equipment Limited" Conqueror set, sold at one time by Joe O'Neill Limited of Glenamaddy. Interesting to see the preamp with its grey CCL capacitors, late 1967 date codes (for their manufacture). The latest visible component is a blue CCL electrolytic capacitor with the date code "6904" = 4th week of 1969. The order code for the CCLs - of all values - was "240". More to come.

13th November

Thanks to Steve, pictures of "Vox Sound Equipment Limited" PA50SS serial number 1157, a relatively early one with metal grilles across the vent openings. Plastic vents were introduced later in the production run.

At present, this is the earliest PA50SS to have come to light. The page on will be rearranged shortly.

PA50SS serial number 1157.

2nd November

Some updates to the page on . Thanks to Niels for pictures of serial number 5654.

Serial number 5654.

1st August

Just to note that the pre-production power section illustrated in the previous entry came in a Supreme formed from three separate elements - standard late JMI preamp; VSEL box with no serial number plate (none was ever fitted); and the pre-production power section.

The preamp has the latest JMI number that has so far emerged: number 2448. The sequence began at 1000. Treble preamps were common to the Virtuoso, Conqueror, Defiant, and Supreme.

It should be said, however, that following the collapse of JMI, a certain number of units were bought in by the new company "Vox Sound Equipment Limited" and given new control panels.

Treble Serial No. 02448.

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