VOX SUPREME SPEAKER CABINETS
1967 - 1972
A JMI cab in its trolley. For further images, see below.
As can be seen, Supreme cabs took their form from the AC100: four 12" drivers, and two Midax horns protected from bass frequencies by crossover capacitors (2uf). A wiring schema is available here.
The drivers at first were Celestion ceramic T1279s, rated at 20-25W, impedance 15 ohms. In outward appearance, they are indistinguishable from the Celestion T1225s, also sprayed "poly grey", of the earlier 4- and 7-series cabs.
All Supreme cabs had a total impedance of 15ohms, the standard for the solid state range from first designs - see the pre-production page. 8ohm cabs are never found.
Occasionally during the JMI period, Celestion horns were used instead of the Goodmans Midax, but Goodmans are the norm.
In the second third of 1967, Goodmans 241H drivers were introduced - heavy cast iron, six spokes on the frames, black dust covers, though still the same blue and silver label. Tilt-back stands (rather than full trolleys) also made their appearance at this time - not such a wonderful idea, as the weight of the amp could pivot the cab backwards in a pretty alarming manner.
In early 1968 Jennings Musical Industries folded. A certain amount of its stock, however, passed to a new company - Vox Sound Equipment Ltd., founded in the summer of 1968 by former JMI men - see this page. Celestion T1279s evidently formed part of the inherited stock as these drivers crop up now and again in early VSEL Supreme cabs. VSEL also dallied for a short time with Celestion T1096s, the 15ohm version of the alnico T1088 - but T1096s were not a good choice soundwise (having too great a treble response). It is likely too that cost soon precluded their use.
But Goodmans - from around 1969 the "Power Range" with green stickers to denote 15ohms - remained the norm through to 1971. The provisioning of cabs then changed, probably a result of the need to cut costs. The Midax horns were dropped - one finds the openings in the baffle still there, but blanked off - and Celestion Greenback T1925s were brought in as the drivers. These had whizzer cones, making them better for bass or organ than guitar, but open-back cabs (intended more for guitar than anything else) were still supplied with them.
Below, a selection of cabs from different periods. This will be augmented and perhaps adjusted from time to time. If anyone knows of any cabs that should be included, do let me know.
JENNINGS MUSICAL INDUSTRIES
March - early 1968
FIRST GENERATION JMI: "VOX" only in logo: no "Solid State"
The Rolling Stones European Tour, 1967. From left to right: Orebo (March 27th); Cologne (30th March), and Warsaw (April 13th).
Mick Jagger standing in front of Brian Jones's Supreme cab before curtain up at Warsaw, 13th April. A great view of the ceramic Celestion speakers, which were standard at first in all Supreme cabs.
A very early cab - possibly serial no. 9. Note the plain silver logo (no "Solid State").
SECOND GENERATION JMI: "VOX Solid State"
A JMI Supreme cab from the third quarter of 1967. The logo has "Solid State" beneath "VOX". Drivers are a species of Celestion G12H, 15ohms, heavily doped. A second layer of cork lies over the gasket, so it is not possible to determine the "T" number. The cab is extremely sensitive - it takes comparatively little input to drive it to high volumes. Older photos on this page.
A cab similar to the one above, "Solid State" in the logo, but regrilled. The horns are not Goodmans Midax, however, but Celestion T1360, with date code 07GM = 7th July 1967. The crossover is a set of four resistors on a section of tagboard rather than a 2uf capacitor.
JMI TILT-BACK CABS
A cab more or less contemporary with the one above. The grille cloth has been changed, but condition is otherwise good. The position of the chrome pivot high up on the side of the re-grilled cab indicates that the trolley was of the tilt-back variety, as in the flyer lower down this page. Again, no serial number stamped on the back plate.
Note that the drivers are black-capped Goodmans Power Range 15 ohm ceramics (rather than Celestions) with old-style labels. Below two Goodmans units from later Vox Supremes.
On the left, c. 1967-1968; on the right c. 1969-71.
Pictures before rewiring and after. The position of the pivot high up on the side of the cab can be seen in the pictures of the cab's interior. The drivers are Goodmans, reconed as 8ohm units unfortunately, so not ideal for a Supreme. The crossover capacitors are Aerovox 2uf.
Above, the Stones at the NME Pollwinners' Concert, Wembley 1968. The Supreme on the far left is of tilt-back design. The ones middle and right of stage have the full trolley, with bars over the top of the cabs.
Flyer from 1969 - early Vox Sound Equipment Ltd.
VOX SOUND EQUIPMENT LTD.
1968 - 1969
Same Celestion speakers as the cab further up this page, but the serial plate indicates Vox Sound Equipment Ltd. Marks on the sides show that the frame was a tilt-back stand, rather than a full trolley.
Probably Vox Sound Equipment Ltd. The speakers, which are Celestion alnico 15ohm T1096s, have the date codes "JA" = September 1968. The wiring has since been renewed. See now this page.
VOX SOUND LTD.
1970 - 1973
Speakers with Vox Sound Equipment Ltd labels, but serial plate for Vox Sound Ltd. The handwheels for the tilt-back stand remain.
Similar to the cab above but with its original tilt-back trolley.
Celestion alnico T1096 speakers. Vox Sound Ltd., serial no. 417. Note the dabs of thick yellow paint over the internal nuts and bolts, typical of Vox Sound. Something is awry with the frame. The side sections are in three parts. It looks as though a tilt-back stand has been modified to accept the upper section of a full trolley.
A Supreme cab from July 1972
A Supreme cab - number 525 - from 1972, with inspection tag and a plasti-leather cover. The drivers are Celestion T1925s, bass resonance (50Hz rather than 55Hz) - code EF, which should mean June 1972 - the inspection tag is dated 11th July 1972. Midax horns have been abandoned. The sides of the cab have both carrying handles and holes for the tilt-back stand. The cover that accompanied was probably designed for a cab with a full trolley - see the last picture.
Another late Supreme cab, with Celestion T1925 drivers and no Midax horns. Serial no. 543. As in the cab above, there are side handles and above them a hole for the pivot fixing of a tilt-back trolley.
Below, a late "new-style" tilt-back trolley, recently sold at auction.
Later the trolleys were dropped, though the top fixings were retained.
The section on Companion cabs, made by Vox Sound Ltd in 1971-1972 to accompany Supremes, has now been given a page of its own.