Vox AC30 Super Twins - separate amplifier and speaker cabinets

Late 1961 to late 1963 - black, copper, and grey panels

Serial numbers in the high 4000s - around 10000.

JMI flyer (with pricelist on reverse) sent out in October 1961. The full page .

The first public announcement of the new Super Twin came in "Melody Maker" magazine, 28th October, 1961 - the "Super Twin de Luxe" at 125 guineas (£131 and 5 shillings): the speaker cabinet with 2x12" Celestion blue drivers (T530) and a closed back (to help the speakers cope with bass frequencies), and a separate amplifier section.

By late October 1961 two types were available: the Super Twin I, with one speaker cabinet; and the Super Twin II, with two identical cabs.

As the JMI typescript flyer signals, the new AC30 had been issued first to Adam Faith and The Shadows to try out and "feature".

Early units were slightly different from later production models in at least one respect. Grille cloth covered the whole of the speaker cabinet front (a "valance" front), as one can see in the picture below:

Adam Faith on stage, NME Poll Winners concert, April 1962, photo by Harry Hammond, his archive now in the .

Standard later Super Twins (in common with AC30 Twins) had a split front. Possibly the speaker cabinet belonging to Faith's band was a pre-production unit - but it may be that small numbers of early units had full valance fronts.

Vox publicity photo (Reg Clark) published by Jim Elyea. Shane Fenton (later Alvin Stardust) with The Fentones. Note the full valance front AC30 Super Twin speaker cabinets. Note too that the amplifier sections have leather handles. The middle amplifier has its grille cloth "sideways" - the diamonds are horizontal rather than vertical.

Valance front Super Twin cabinets can still be seen in JMI literature from mid 1962.

Initially amplifier sections had the new top boost circuit with controls (treble and bass) provided in a cut-out on the back panel. Later, top boost became an option rather than a standard fitting.

In May 1962, JMI advertised the new Super Reverb/Twin/I and Super Reverb/Twin/II. Controls were on the back panel in a cut-out; reverb pan and driver transformer mounted on the underside of the amplifier's slider board. Early examples are scarce.

The controls on the back panel of AC30 Super Reverb Twin serial number 2803.

The first Super Twins (Is, IIs and early SRTs) had serial numbers in the high 4000s, and they were numbered in sequence with plain AC30 Twins through to around serial number 10000. The highest known at present is number 9979 - see below. Thereafter Super Twins were given a sequence of their own beginning at 2500.

Cabinets were covered in both beige and black pebble covering early on; handles were leather, one apiece for speaker cabinet and amplifier section. Beige gradually gave way to black. Injection moulded rubber handles came in around serial number 7000.

The pages on AC30s with serial numbers in the 5000s and 6000s, , and .

If anyone knows of further early Super Twins that should be incorporated on this page, .

Serial number 4969 B - currently in Germany

An early AC30 Super Twin amplifier section. The "6" on the serial number plate is actually an upside down "9". Currently (March 2020) on in Germany. Possibly the original black covering. Sold at some point by Freedmans of Leytonstone (London). The main Hunts filter cap in the preamp has the date code "HSW" = 25th week of 1961; the smaller blue bypass cap has "HWW" = 21st week of 1961. Note that amps covered in black occasionally had black plastic corner protectors. Amps covered in beige had none.

Serial number 5002 N - currently in Italy

An early Super Twin, grille cloth replaced, and probably and old recovering. The speakers in the cabinet are from late December 1961. In the power section: the main Hunts filter cap. has the date code "HSW" = 25th week of 1961. The blue Hunts 32uf cap. underchassis has "WYW" = 10th week of 1961. AC30/6 schematics indicate a 8uf underchassis; but most amps have 32uf. The Welwyn 22K resistor has the date code "SE" = May 1961.

NEW

Serial number 5204 N - formerly in Germany

Pictures from 2006. A Super Twin amplifier section with its original footswitch. Transformers are Haddons. No back panel Top Boost.

Serial number 5311 N - currently in the USA

A nice Super Twin with top boost on the back panel. Transformers are Albions. In the preamp, there are several black WIMA Tropydur capacitors still in place. The blue Hunts capacitor in the second but last picture has the date code "YAH" = 9th week of 1962.

Serial number 5329 N - currently in the USA

Older pictures of the set.

An early Super Twin with original cover for the amplifier section. Transformers made by Albion: OT is part no. OH083/DT; mains is OH114/DT; and the choke PE241/DT. An add-on top boost circuit has been added (controls on the amp's back panel).

Serial number 5355 N - currently in the USA

A Super Twin head. Good to see some of the original black WIMA Tropydur capacitors still in place. The original footswitch is present too.

Serial number unknown - currently in the USA

A fantastic early twin, pictures just a little too small to make out the serial number. Some fabric has been added inside the speaker cab (to help reduce vibration).

Serial number 5367 N - currently in the USA

NEW

Serial number 5370 B - currently in the UK

Smooth black/charcoal vinyl. New handles and grille cloth on the amplifier section. The date codes on the Celestion blues are 01KH and 14KH = 1st and 14th September 1963, considerably later than the amplifier and probably the cab (assuming amp and cab go together). Note that the speakers have been out at some point and rotated by 90 degrees - normally the Vox logo is horizontal.

Serial number 58xx - currently in the UK

A good solid looking Super Twin, probably a Super Twin II originally (note the too factory-made holes for speaker connectors), some readjustment on the serial number plate though.

Serial number unknown - currently in the USA

Serial number unknown - currently in the USA

Serial number unknown - currently in the USA

Serial number unknown - whereabouts unknown

Speaker cab missing its handle. The cabinet of the amplifier section has distinctive discolorations on its top.

Serial number unknown - currently in the USA

Note the plastic (rather than leather) handle.

Serial number 6313 - currently in the USA

Note

So far very few Super Twins with serial numbers known with certainty to be in the 6000s and 7000s have come to light. Perhaps some of the unknowns above belong to those numerical ranges.

Serial number 7806 N - currently in the USA

Serial number 7086N. Note the new-style plastic handle = early 1963.

Serial number 7925 N - currently in the USA

Serial number 8177 N - currently in the UK

Top Boost added on the back panel at factory. Pebble (dimpled) vinyl.

Serial number 8274 N - currently in the UK

Albion transformers, mains replaced.

Serial number 8311 B - currently in the USA

Albion transformers. One of the blue Hunts preamp valve bypass capacitors has the date code "HHH" = 22nd week 1962.

Serial number 8368 - currently in the USA

Serial number 8423 N - currently in the UK

Possibly originally a Super Twin II. Note the double speaker sockets on the back panel - now replaced with jacks.

NEW

Serial number 9394 N - currently in the USA

Basketweave vinyl. Both amp and cab have features which generally come in later - black vents and silver alnico speakers.

Serial number 9664 B - currently in the USA

Further pictures to come.

Serial number 9677 B - currently in the UK

A Super Twin, Bass flag on the amplifier front. The Woden mains transformer has the date code "JU" = September 1963. The output transformer has "LU" = November 1963.

Serial number 9885 - currently in the UK

Further pictures to come. The Woden transformers have the date code "AV" = January 1964. Chassis assembled by Burndept.

Serial number 9952 - currently in the UK

Picture to follow

Serial number 9979 - currently in the UK

With an original set of covers. Top boost controls on the back panel of the amplifier section. The speaker cabinet appears to have been rewired.

Serial number 10472 N - currently in the UK

Still part of the main AC30 numerical sequence, a Super Twin.

Serial number unknown - currently in Japan

Note the integral top boost controls in the copper panel.

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