VOX HORN UNIT
Above, part of the Vox stand at the British Musical Instrument Trade Fair, held at the Russell Hotel, London, 20th-24th August, 1967. For the amplifier on top of the large angle-fronted Gyrotone cab at left, see the foot of this page.
A detail of the cabinet on the floor in the foreground of the larger picture above. Note its angled front. The grille cloth is 5 1/2 diamonds tall.
Below, a horn unit, said to have been one of two originals, similar in format to the unit exhibited at the Russell Hotel in August '67. Note that the grille cloth is 4 1/2 diamonds tall though. The width of the unit is the same as a Supreme cab.
The horns are Celestion T1436, 3ohms each, the five adding up to a total of 15ohms, the normal impedance of the solid state range. One of the drivers is marked in ink 22/12/1966. The other four have date codes "15HM" = 15th August 1967.
The plaque is hand-stamped - serial number "S1001", the impedance given as 15ohms. Note that the jack socket has a white ceramic surround, as early Conquerors, Defiants and Supremes, etc.
VOX PA 50
A detail from the photo of the JMI stand at the Russell Hotel, 20th-24th August, 1967. Just visible on the amplifier is the legend "VOX PA 50". The unit was not put into production by Vox. It was, however, produced by JEI, the company founded by Dick Denney and Tom Jennings after they had been sacked from JMI.
Above, an early PA 100 made by JEI - Jennings Electronic Industries in mid 1968. Presumably Denney and Jennings took away with them certain designs that Vox had decided not to produce.
The PA amps in the solid state catalogue of mid 1967 were evidently not put into production by Vox either - at least, no surviving examples are known.