Jennings Musical Industries: March - late 1967

The picture above is from the Vox solid state catalogue of July 1967. The amp ilustrated is actually a pre-production model - note the position of the footswitch socket. For more on prototypes and pre-production amps, .

Produced at the , the Vox Supreme was the flagship of the new solid state range, its smaller kin being the Virtuoso, Conqueror and Defiant. For an overview of the early advertising, .

Its general format: a "Super Twin" guitar amp, that is to say separate amp and speaker cabinet, 100W output, twin channel, with distortion, reverb and tremolo operated by a three-button footswitch. The Normal channel had the tremolo along with switchable top boost. The Brilliant (treble) channel had the distortion and a mid range boost effects network. Reverb could be switched between the two.

The speaker cab took the same form as an AC100 cab, but with new ceramic drivers - Celestion T1279s, 15 ohm and rated at 20-25 watts. Total power handling, the two Midax horns included, was probably in the region of 120W, which some Supremes could certainly kick out if their output stages had been set up to run hot.

An extract from the Vox pricelist of July 1967. The Supreme cost £271 and 19 shillings. In today's money, that would be around £4,500 according to the Bank of England's inflation calculator. .

The first band to be issued with new Supremes was The Rolling Stones (in March 1967) - see this page. Alan Harding, chief engineer at Vox, accompanied the band on their European tour in Spring 1967 to monitor the performance of the new amps and the ceramic speakers, about which there was some concern (comm. from AH), needless as it turned out.

At some point in the second third of 1967, JMI introduced the tilt-back stand. As in the case of the Conqueror and Defiant, the amp was attached to the cab with removable brackets - a really bad idea, as Supremes are surprisingly heavy. The top section of the chrome frame often left circular grooves on the sides of the cabs - see serial no. 1094 below. See the for further examples.

General characteristics of the earliest (first generation) amps - serial numbers 1001-1160:

Below, a register of surviving amps. If anyone knows of early Supremes that have not yet been included, do let me know.

Serial number 1030 - currently in the UK

Preamp no. 01390; power amp no. 01164. The latest dateable element in the preamp is a yellow Lemco capacitor, "YC" = March 1967. In the power amp, a red CCL filter cap, "B7" = February 1967.

A few repairs were made to the amp in the 1980s - new black plastic input sockets and a few resistors and caps., but otherwise condition is not at all bad. The metal handles on the box have been removed, and a new Vox handle fitted. Click on the buttons below for further pictures.

Serial number 1047 - currently in the USA

March 2020. Currently on . Externally in superb condition. The indicator lamps on the preamp fascia are later replacements.

Serial number 1058 - currently in the UK

Power amp chassis 1045. Preamp chassis 1782. Required some bringing back to life, but everything now in working order. The handle is new, as is the MRB selector switch. Some of the knobs, acquired separately, are from something like a Vox Echo unit, or perhaps effects units. The original Belling Lee mains input survives, as does the original mains cable. The main CCL filter caps have date codes "K6" and "L6" = November and December 1966.

Serial number 1065 - currently in the UK

Bought in Southampton in the mid 1990s and taken to Portugal. Returned to the UK in 2015. Preamp chassis 01673. One of the red CCL capacitors has the date code "B7" = February 1967. In the power amp, one of the main filter caps has the date code "K6" = Nov. 1966. Inspection of other components to follow.


Serial number 1066 - currently in the USA

A nice-looking Supreme currently (May 2021) on . In the pictures there is a resistor in the DIN socket jumpering the distortion on.

Serial number 1081 - currently in the USA

A good early Supreme with extra sockets for footpedals to control only the Reverb, and only the Distortion. Two different fonts used for the legends. The work is nicely done, and early. A similar arrangement is to be found on a later amp (Vox Sound Ltd), below, though one of the DIN sockets is on the top panel. On the back panel of 1081, a hole for a second jack speaker output has been stopped up. The original footpedal that operates all three effects (reverb, tremolo and distortion) still survives. Thanks to Gene for the pictures.

Serial number 1087 - currently in the UK

Power amp chassis 1160. Preamp chassis 1613, the yellow Lemco capacitors with date codes "XL", "YB" and "YC", respectively November 1966 and February and March 1967. Filter capacitor date code "D6" = April 1966, clearly older stock when used. In reasonable condition and now in full working order. The original Belling Lee mains input has been replaced with a modern IE connection. At some point the bias boards went up in smoke (the originals are pictured above) - one can see the scorch marks on the preamp umbilical and on the inside top of the wooden box.

Serial number unknown - currently in the UK

Preamp chassis T1706. Power amp chassis C1028. In full working order, reverb, tremelo and distortion all operable via the footswitch. A huge sounding amp. Cosmetic condition is fair. Minor repairs to the bias boards some time ago to judge from the tarnishing. The preamp has been recapped. The original bias caps are still in place - date code "K6" = November 1966. Other date codes to be provided.


Note that black panels make their appearance at around serial no. 1090 also in Super Foundation Bass amps. See this page.

Serial number 1094 - formerly in Berlin, now in the UK

Formerly in Berlin, now in the UK. Amp no. 1094, with a JMI speaker cab designed for a tilt-back stand (the hole for pivot mounting high on its sides), possibly from another source. The amp lacks the relevant fixings on its underside, so may have been issued originally with a cab in a full trolley. The original Goodmans drivers remain, but have been reconed as 8ohm units. The Midax horns and most of the original wiring have gone. Both cab and amp have been well used, but are in fine working order. Further pictures of tidying up to follow.

Lemco capacitors in the preamp have date codes "XM" and "YB" = December 1966 and February 1967. CCL caps in the preamp "B7" = also Feb. '67.

Serial number 1099 - currently in the UK

The original speaker cab also survives. Thanks to Alex for the details.

Serial number 1110 - currently in the USA

Sold on ebay.uk in 2006. A single image. Had been used for years with a keyboard.

New pictures (July 2015), thanks to Tom. The amp at one time belonged to the band "The Rats" - guitarist: a certain Mick Ronson, from 1966-1969. The main CCL filter caps have the date code "G7" = July 1967. The RCA 2N3055 transistor has "7E" = May 1967.

Serial number unknown - currently in Spain

Advertised on a Spanish site some time ago, now gone. No further details known.

Serial number unknown - currently in California

Sold in California around 18 months. Perhaps originally with its cab (last picture), which was sold separately.

Boxes now without holes on top for securing the preamp; logo in gold (From late July 1967).

At this point, black plastic jack sockets enter the picture too - see ST.1112 and ST.1121. Note however, that ST.1155, which was sold by Music Ground in 2014, has old-style metal jack sockets. Perhaps the preamp in this last comes from an older amp.

Serial number 1112 - currently in the USA

Fantastic condition, complete with original cover. The speaker cab - a rare bird in being a Jennings (JMI) unit - has its original Goodmans drivers, horns and wiring. "Solid State" in the logo. For other Jennings cabs, see here.

Serial number 1121 - currently in Denmark

A superb rig in fantastic condition. Full working order. Bought by the present owner in 1970. Celestion drivers as some of the cabs on this page. The Celestion horns have date codes: 11GM = 11th July 1967. . Thanks to Stephen for the pictures.

Lemco capacitors in the preamp have "YE" = April 1967. The Welwyn resistor on the output board in power amp has "YE" = April '67 too. CCL bias caps however have "G7" = July '67.

Serial number 1155 - currently in the USA

Refurbished by Music Ground. Apparently lacks mounting holes / screws for the preamp on top of the amp.

Serial number unknown - currently in the UK

Belonged to the late Rory Gallagher - presented on the page of the .


Serial number unknown - currently in the USA

A later Vox Sound Ltd preamp and power section (from 1968 - the MRB is three-position only) in an early box. Note the fixings for the preamp on top by the corner protectors. Perhaps issued from the factory, or rescued in later decades - the Vox Sound box may have disintegrated. The carrying handle is a replacement. Thanks to Gene for the pictures.

Serial number unknown

Preamp fixings on top of the box, but black plastic input jacks.