17th June

Melody Maker magazine, 5th October 1968

"Melody Maker" magazine, 5th October 1968 - the new Orange shop on New Compton Street. Part of the premises had formerly been owned by JMI. Two AC50s in stock. The Vox Essex bass amp must have been an import from the USA.

The Orange shop, New Compton Street

The Orange shop in the 1970s (?). Pic from

The Orange shop, New Compton Street

No AC50, but one can just see a Vox Supreme middle left.

16th June

Melody Maker magazine, 27th July 1968

"Melody Maker" magazine, 27th July 1968. Small ad advertising a Vox 50 watt PA new in boxes.

Serial numbers for PA amps were part of the sequence for the guitar amps. Below, AC50 serial no. 02666, actually a metal-clad sloping-front PA.

Vox PA50 amplifier

26th May

A new page now started, bringing together dealer ads and small ads for Vox AC50s published in newspapers and magazines in the 1960s - . It's also accessible on the main index page for .

25th May (2)

Melody Maker magazine, 14th August 1965

Melody Maker magazine, 14th August 1965. Probably a small-box Mark 1 AC50. Large box AC50s are considerably wider than T60 speaker cabinets and were never formally issued with them in the 1960s.

25th May

Melody Maker newspaper, 17th April 1965
Beat Instrumental magazine, March 1966

Left: Melody Maker newspaper, 17th April 1965, advert for the National Beat Contest. Right, Beat Instrumental magazine, March 1966. Ads for the AC50, 1965-1967, .

Judging by the ads in the back of Melody Maker magazine, Vox AC50s paired with Line Source speaker columns seem to have caught on as PA amps. There is also this short notice:

Melody Maker magazine, 19th June 1965

24th May (2)

Melody Maker magazine, 13th March 1965

From the small ads of Melody Maker magazine, 13th March 1965: "1964 (July) Vox AC 50 Amp. Bass Amplifier, £90". Given the date of purchase, evidently a small box AC50 Mark 1, either thin or thick edged.

24th May

Melody Maker magazine, 30th January 1965

Melody Maker magazine, 30th January 1965: a Vox A.C.50 Super Twin and Stand" for £184. This was the standard retail price at the time.

Melody Maker magazine, 2nd January 1965

Melody Maker magazine, 2nd January 1965 [CORR]. Macari's Musical Exchange in Edgware (the first shop) also had a new one to sell. The two-year Hire-Purchase terms are noted.

22th May

A further amp with a serial number low in the 4000s - its plate being two-line - . Three-line plates come in around serial number 4150.

19th May

AC50 serial number 4094 . The amp is similar to no. 4083, immediately above it on the page. Thanks to Jerry for the pictures.

19th May

Beat Instrumental magazine, May 1966

Continuing the theme of adverts, above, one first published in "Beat Instrumental" magazine, May 1966 - perhaps a sort of passing reference to the AC50's name in the U.S.A. in 1965: the "Royal Guardsman". By May 1966, however, sales of English valve amps had more or less come to an end.

12th May

Currently on Gumtree UK, serial number 1931. Valve rectified (Mark 2) and in good external order. Probably from late 1964. "AC50" is handstamped, the serial number machine-stamped.

5th May

Serial number 3619 (above) . The presence of the 0.05uf 800v grey Radiospares capacitor in the preamp by the choke indicates that this amp was made for export to the USA. Note also the original sticker "Taylor-Made Woodware" on the underside of the slider board. Thanks to Don for info and pictures.

30th April

Vox AC50 serial number 3640
Vox AC50 serial number 3640

AC50 serial number 3640, solid state rectified, pre-brimistor. From the third quarter of 1965. Pot codes "EM" = May 1965. Great condition. Thanks to Peter for the pictures. Further coverage .

29th April

Some transformers from two AC50s: output from serial number 5369 (1966); and mains from a Dallas Arbiter amp (1975):

AC50 transformers
AC50 transformers

The two images above, the output transformer from serial number 5369 its the plain metal shroud lacking. The black-shrouded units were introduced shortly after this amp had been produced.

AC50 transformers
AC50 transformers

The mains transformer from a Dallas Arbiter amp.

28th April

A picture page now set up on , supplied by Servaas Muziekhandel in The Hague with a UL760 cab. Thanks to Philippe.

15th April

Below, a couple of 18" Celestion speakers in Jennings blue from early Foundation Bass cabs (before mid 1964). One is a T1022, the other a T1079. Both are 8ohm. The speaker on the left has been reconed.

Pulsonic code of the original cone in the right hand speaker.

Above, a detail of the metal dust-cap, which has a black rubber trim strip around its edge.

14th April (2)

Further pictures of AC50 serial number 1503, valve rectified, early style large box, .

14th April

Above, the first advert for the large box AC50 published by Vox in "Beat Instrumental" magazine, August 1965.

"Beat Instrumental" magazine, November 1965: advert for the large box AC50 Super Twin, the amp slightly squint on the trolley.

Note that the large box AC50 had already been represented, however, in UK and US brochures published in late 1964 and early 1965. See .

13th April

A page from a German brochure, printed in September 1967 and circulated in 1968. 2628 deutsche marks (for the AC50 super twin) was equivalent to around £260 - £4300 or so in today's money (according to the Bank of England inflation calculator). The amp alone was 1188 deutsche marks = £110 in 1967 = £1800 today.

Page 4, which advertises two 7-series amps - the UL710 and UL730 - .

Above, excerpts from the British retail pricelist of April 1967. Prices in Germany were around 50% more than in the UK.

12th April

AC50 serial number 1503 from the last third of 1964. Note the early box with cut-outs in the baffle. The corner protectors are later replacements for the original single pin protectors, now gone. Further pictures to follow. Thanks to Peter.

6th April (2)

"Formula 1" (from the West Midlands) pictured in late 1964 with a small-box (presumably diamond input) Foundation Bass set, similar to the one with Johnny Hallyday's band, below.

6th April

Two shots of Johnny Hallyday and band from Getty Images, the first from 1967, the second 1966. Great views of the brown-fronted diamond-input amp and Foundation Bass cab.

5th April

"Vox Sound Equipment Limited" AC50 serial no. 1081, the highest number to have surfaced so far. The cab is a Jennings Electronic Industries B1 (bass, 1 x 18"), from 1969-1972. Further . Thanks to Roland.

2nd April

Pentangle on stage, Copenhagen, September 1969, with two AC50s - one with new-style logo, one old. Pictures from Getty Images.

30th March (2)

The Swingin' Sting Rays with an array of Vox gear in 1965: two large box AC50 Foundation Bass sets; an AC100, a pair of LS40 speakers, and a Vox Phantom guitar. The other guitar is a Burns bison. Pic from .

30th March

Just to single out properly a small group of early AC50 Mark 3s (solid state rectified, made by Triumph) with eyelet tagboards for the bias circuitry - . Pot codes are January and February 1965.

Vox AC50s with eyelet tagboards for the bias circuitry

So far, five amps with this sort of board have come to light, but there are probably others - pics of AC50 underchassis are (understandably) thinner on the ground than pics of preamps, say, so it may take a little while for others to turn up.

27th March (2)

Some new pages on serial number 1749: . . .

27th March

There is now a new index page for material on the , 1975 - 1976. Further details will be added over the coming weeks.

25th March (2)

Vox AC50 serial number 1749
Vox AC50 serial number 1749

A superb AC50 - serial number 1749 with original cover, Foundation Bass cab, speaker cable and trolley. Thanks to Craig for the pics. More to follow.

25th March

A Vox Sound Limited AC50 amplifier from 1975

Above, an early Vox Sound Limited AC50 made by Dallas Arbiter in 1975. The literature that accompanied the amp from the Shoeburyness factory . The exterior and cover, and main chassis are on new pages - , and .

24th March

Above the earliest type of XLR mounting plate on large box Vox AC50s - engraved black traffolyte. By , grey mounting panels had been brought in. A number of AC50s with early grey mounting plates have 1/4" jack sockets instead of Cannon XLRs - but the fixing holes for the Cannons are always there.

From around serial numbers 3400-3500, round Amphenol XLR sockets become the norm, though one occasionally finds them earlier on. Amphenols remain standard all the way through to the "Vox Sound Equipment Limited" amps, sold in 1968 and 1969 - .

Note that the VSEL mounting plates (example below) are black rather than grey. One can tell them apart from those in the earliest AC50s, however, by the larger captions and the three fixing holes for the Amphenol connectors.

Detail from VSEL AC50 serial number 1061, sold in late 1968 or early 1969, Amphenols and link connector removed.

21st March

Some quick pics of the warranty postcard and other items supplied with Dallas Arbiter-made AC50s in 1975 - .

17th March (2)

Above, the Hayman drum factory at Shoeburyness, owned by Dallas Arbiter. Vox moved into part of this factory in 1973. Photo Mark Goodwin.

17th March

A page from the Dallas Arbiter / Vox catalogue of late 1973 or early 1974. Note that the AC30 and AC50 represented have the logos used on "Vox Sound Equipment Limited" amps. .

Quite what Dallas were offering is not clear - perhaps a small stock of unsold VSEL amps. Under "Vox Sound Limited" - the company that Dallas took over - the AC50 was phased out (ie. from 1970 to 1972). No mention is found in any of the VSL catalogues nor in the pricelists published in "Beat Instrumental" magazine. Below, a pricelist from July 1971.

"Beat Instrumental" magazine, July 1971. Only two valve amps: the AC30 and V100.

The first we see of the AC50 after 1969/1970 is in 1975 - the new Arbiter-made amps with the "old-fashioned" VOX logo in gold letters. The entry for 13th March, below, indicates the state of things in 1974 - price of the AC50 "To be announced".

Coming soon, pictures of a Dallas-made "Vox Sound Limited" AC50 with its factory-supplied documentation. The address of the company at that point: Elm Road, Vanguard Way, Shoeburyness, Essex. Naturally this was Dallas Arbiter, the address of which is given in trade journals of the time as: DALLAS MUSICAL LTD. Dallas House, Vanguard Way, Shoeburyness, Essex SS3 9QX, Tel 037008-4121/5.

Elm Road and Vanguard Way

"Beat Instrumental" magazine, October 1973, signalling the end of the original incarnation of "Vox Sound Limited". VSL evidently did not put in an appearance at the Associated Musical Instrument Industries (A.M.I.I). show in August of that year. Negotiations were probably in progress with Dallas Arbiter though. Dallas did not take on the solid state amps, however, which had largely come to an end in 1972 in any case.

As far as "Beat Instrumental" is concerned, the first one hears of the Dallas-made AC30 is in May 1974. The AC50 was evidently "in progress" - and still in progress in December '74, as its price then is also "To Be Announced".

"Beat Instrumental" magazine, May 1974.

11th March (4)

An amp with a serial number in the 7000s, exported to Scandinavia, .

11th March (3)

An amp with a serial number in the 6000s . Accompanying is an AC30 cab in an early Super Twin trolley with a basket top.

The amp with chassis no. 2561 is actually serial number 6238 (not 6458 as previously indicated), currently in Sweden. A set of .

11th March (2)

Recently sold in New Zealand, a nice early-ish AC50 mark 2 (large box), serial no. 1735:

Condition looks good. Regrilled with modern cloth. No indication of what sort of voltage selector is present.

Below, a late JMI AC50 from late 1967 / 1968, serial number probably in the high 7000s or 8000s:

Currently on . Note the Servaas shop plate. Servaas was an important Vox dealer in the later 1960s, supplying AC100s, AC50s, 7-series and solid state amps, speaker cabs, and so on. For another Servaas-badged late JMI AC50, .

It seems that sizeable numbers of late AC50s went to the Low Countries and Scandinavia at the end of the JMI period.

The amp above Scandinavian law required the removal of voltage selectors. Over the hole in the control plate the label: "Europaeisk Musik Import. Ulle Vaerlose. Denmark.". Europæisk Musik Import A/S, on the outskirts of Copenhagen, was owned by Per Ole Larsson. Its main business was in distributing "Max" amps.

The company is listed as a Vox dealer in an advert placed in "Beat Instrumental" magazine in February 1969 - on the Vox Supreme website.

11th March

The date code on one of the pots of currently in a later large box (probably from a "Vox Sound Limited" amp) is now known to be "GK" = July 1963. Thanks to Rob for the info.

  • early vox ac50 in the uk
  • early vox ac50 in the uk

3rd March

Serial number 7701 and its solid state Foundation Bass cab now . A similar pairing is to be found in serial no. 7722. Both 7701 and 7722 are likely to be from the first third of 1967.

2nd March

AC50 serial number 8110, still JMI, made in 1968 - the latest '68er being no. 8297 - . Thanks to Rich for the pictures. More to follow.

24th February (3)

Three more amps added: one with a serial number in the (closely similar to number 3385); and serial numbers and .

24th February (2)

"Vox Sound Equipment Limited" AC50 no. 1068 . Thanks to Timo for the pictures. Interesting that numbers of these amps went to Scandinavia.

Serial number 1068 is in Finland, its import probably handled by the PSO company = "Pohjoismainen Sähkö Oy". PSO was a major Vox dealer from 1967 to 1969 - on the Vox solid state website.

24th February

Melody Maker magazine, 20th August 1966

Melody Maker magazine (really a paper), 20th August 1966 - advert placed by Len Stiles - an AC50, probably secondhand, for £45.

11th February (2)

The entry for now updated. Thanks to Paul for the pictures:

Above, a detail from the preamp, showing blue Hunts caps with date code "YNS" = 7th week of 1965. See for further details. From the evidence assembling so far, it looks as though Triumph ordered batches every ten weeks or so, presumably ordering a new one well before its predecessor was too depleted. The batches appear to have contained caps produced in different weeks (as one might expect). Triumph will have known fairly early on how many AC50s could be and were being produced per week.

But one cannot entirely rule out the possibility that new supplies were ordered fairly randomly, on spec. - more admin, more bother, but nonetheless possible.

11th February

A nice diamond-input AC50 with basketweave tolex - a little while now on ebay.uk. For similar amps, . Around 250-300 of these were made in the Spring and Summer of 1964. Most were paired with Foundation Bass speaker cabinets; a proportion however were sold for guitar.

Above, Chuck Botfield of the Rocking Berries, pictured in "Beat Instrumental" magazine, no. 28, August 1965. The speaker cabinet is an AC30, as it is in the picture (though not in the description) of the "Royal Guardsman" in the US brochure below - count the number of diamonds across the front: 17 1/2.

The trolley above appears to have parallel bars across the top, so of a newer sort than the one depicted below.

22nd January

Thomas Organ advert, early 1965

A Thomas Organ brochure from early 1965 - the AC50 as "The Westminster" and "Royal Guardsman" prior to the transferring of the names to amps in the solid state line.

Note, however, that the AC50/Royal Guardsman as described in the blurb is actually a new large box amp (twin channel) with a large box cab (33" wide). The picture is simply an old one re-used.

Below an advert for the AC50 / Royal Guardsman in the Chicago Daily Herald, 26th August 1965 - reduced from $730.00 to $660.00.

Chicago Herald August 1965, advert for an AC50 / Royal Guardsman amplifier

Vox dealers in the US were still selling (or rather selling off) English-made valve amps in late 1966 - see this entry below.

The amp below (entry for 15th Jan.) looks to have been assembled to look like the one in the brochure above. Cab and amp are certainly original, but not to each other.

15th January (2)

Notes on date codes in the blue Hunts capacitors used in AC50s have now been gathered together Further details will be added.

15th January

Diamond input AC50 in thin edged box

Recently surfaced, a diamond input AC50 mark 1 in a thin-edged box. The trolley is repro and the cab an AC30. A similar amp survives in the UK.

Pictures of an amp, trolley and speaker cabinet set - serial number in the higher 3000s - .

14th January (3)


Above, an AC50 currently in Scandinavia, serial number probably in the 7000s: late 1966 or early 1967. Note the hang-tag, supplied by Vox, slipped into the voltage selector slot. Scandinavian legislation had long required selectors to be removed from imported electrical devices. Further pics of the amp, disassembled, .

14th January (2)

Above, pictures of an early AC50 mark 2 in a small box (from the factory), currently on Reverb.com. Also .

The mustard caps have date codes "B4" = second quarter of 1964. One of the Hunts capacitors has the code "HNT" = 27th week of '64 = early August '64. It is likely therefore that the amp was made in late August, possibly September, of that year.

14th January

Further amps newly registered: , , and . A further batch to follow soon.

13th January (5)

Pictures of serial no. 3435 (its serial number plate mis-stamped) .


Just to gather together some fairly well known points. The earliest cabs had baffles made from birch ply. Speakers were silver alnico T1088s. See for instance, the cabs accompanying serial numbers and .

By the time we get to AC50s with serial numbers in the 3000s, a different arrangement prevails. Baffles are made of chipboard (particle board), and Celestions have been set aside in favour of ceramic Fanes. See the many examples . For a very short period however, ceramic Celestion T1217s seem to have been adopted (or at least tried out) - see .

A small number of cabs accompanying amps with numbers in the 4000s, however, have unpainted ply baffles - see for instance.

At some point in 1966, corresponding with serial numbers in the lowish 6000s, ply baffles seem to have been reinstated as a matter of course. At much the same time, Goodmans 241 speakers were bought in - see the cab .

Survival rates for early large-box cabs are relatively low - in all likelihood a consequence of the inability of the alnico speakers to stand up to the power put out by the amps. When the speakers failed, one imagines many of the cabs were put aside.

13th January (4)

Vox AC50 supplied by Cumiskey and Sons, Dundalk

A Vox AC50 supplied by J. Cumiskey and Sons, Dundalk (County Louth, Ireland). The premises were at 42-43 Clanbrassil Str. - photo below. Never has such a large dealer/supplier plate been so prominently applied. The amp is a VSL model, c. 1975.

13th January (3)

Also repeated from the Vox AC100 website - The Arlington Heights Herald, 17th September 1964 - three weeks or so after JMI had agreed to provide 1.5 million dollar's worth of equipment (£534,000 then) to Thomas Organ. Note "just flown in". AC50s along with a certain number of AC80/100 will have been among the first batches to arrive. The Herald was presumably reporting the arrival at Chicago - see below.

Vox advertisement from The Chicago Tribune, 13th December 1964. The Thomas Organ Studios at the Golf Mill Shopping Center was about 2 miles away from O'Hare International Airport.

Above, a copy of a Thomas Organ service bulletin of December 1964, still circulated as part of the "Vox Amplifiers Service Manual, Volume 1" in 1967 - the subject "Blown Fuses". In the UK, AC50s and AC100s normally had 3A fuses, so no change for the AC50 in the USA.

13th January (2)

Repeated from the AC100 website - The Pittsburgh Post Gazette, 23rd August 1966 - Joseph Horne and Co. still offering English amps. The AC100 (Super Beatle) for $869.95 - note the mention of two inputs and "tone circuits for split effects" (not sure what that signifies). The AC50 (Royal Guardsman). AC50 Foundation Bass (Westminster). AC30 SRT (Buckingham Super reverb twin) - note the mention of three channels, six inputs, which might just as well indicate a solid state T. Organ amp, but more likely given the context, a slope sided AC30 SRT, its cab with a split front and closed back ("separate compression type speakers").

Early US brochures, flyers and adverts for Vox amps - including an early dealer pricelist and parts list - are being assembled on this page.

13th January

Three amps with added: 3051, 3541 and 3709. 3709 is the highest so far still with a white warning plaque. Red plaques have come in by no. 3814. On the boxes of AC100s, the red plaque appears around serial number 740.