Jennings Electronic Industries V15, V30, V100, FR100 and PA100

Jennings / JEI V100 (two versions - Vamp and "purple" )

Note that the denomination "V100" was also given by Vox Sound to their 100 watter.

Both versions of the Jennings amp used the same power section as a several other 100w amps marketed by Triumph, Johnson and Vamp. The Triumph, Johnson and Jennings units were manufactured by Triumph in the Croydon/Purley factory, but as Dave Roffey, the designer of the power amp, has indicated, Vamp went on to have their versions made elsewhere. An excellent site devoted to Vamps can be found at It includes the text of a fascinating interview with DR.

The first version of the Jennings JV100

(aka the Jennings AC100 - see the brochure, immediately below these photos)

On the left, a glimpse of a Jennings brochure, published by J. Elyea, Vox Amplifiers: The JMI Years, p. 100, showing the AC100 and the D4 cabinet. Note that the logo on the amp is centred. On the right, a surviving cabinet.

NOTE: what is probably a second version of the Jennings 100 amplifier is also known to survive, having different grille cloth, a black control panel, and a slightly smaller box.

The purple JEI V100

In an email concerning the purple V100 pictured below, Dave Roffey said "This is certainly a strange beast. The power amp section is definitely the original chassis I designed for the Triumph 100 watter. I do recall the effort required in the days of silk screening artwork. All that letraset rub down lettering! Similarly with the PCB work and sticky backed, black crepe tape layed down by hand. Took days then. One of the reasons for [my] moving on to Vamp, was that Triumph was floundering a bit, losing direction, and the glamour of new spirit, grabbed the 'young' mind I had in those days. I felt guilty as I matured, but at least had the opportunity of speaking to Geoff and putting it all to rest. Seems to me this is a marrying of concept and available stock, between Triumph and Jennings at the time when both companies were at a leaner stage. Quite who designed the front end, I am not sure, but Geoff Johnson was not a guy to give in, and most likely used contacts to get this unit together. He would have been presented with a design goal, discussed cost effective variations and produced a prototype for approval. The pre amp stages would have come from prior designs, with a bit of manipulation for the reverb. Bit of jiggling for the case, and that would have been it. Chassis screening and spraying would have been done in a small unit in South Croydon, behind a music shop where I bought my first Burns Jazz guitar just before Strats were available in this country. Ah! the good old days! I'll have a ponder over the next few days, and see if anything pops up in the brain cells that might be more useful. All the best, Dave"

Serial number 3 (1003) - currently in the USA (collection: Lee Holt)

Serial number 7 (1007) - currently in the UK

A large amp: 25 1/2" wide; 12 1/2" deep; 9" Nice-sounding with good reverb. A couple of replaced components in the power section, but otherwise all original. Probably from the early 70s given the colour. Although the general appearance is handsome enough, the chassis is an utter pig - pig of all pigs - to get in and out of the case. Not only does one have to take the carrying handle off, but detach and reattach, inside the case, an L-shaped metal bracket that attaches to the back of the preamp. The chassis simply will not come out otherwise. And it really was not a good idea to mount such substantial transformers on a flimsy steel base. One suspects that if Denney had anything to do with the electronics of the preamp, he certainly played little part in the design of the V100:


Images now on this page

Jennings AC15

Jennings J100 (solid state)

Possibly an early J100 - the amps below have a green/grey fascia behind the front-panel controls.

Sold on in mid 2012. A two channel amp with a four-position boost knob (a relative of the mid-range boost of Vox solid state amps).

Excellent condition, currently advertised on this site.

Jennings J100 combo(solid state)

Sold on ebay in 2007.

The Shadows with three J100 combos in 1971. Picture from this site.

Jennings B50 (solid state)

Currently in Europe

Immaculate condition. Note the old-style Goodmans speaker with cursive lettering. Certainly older than the B3/B50 set below. In the last image, amp and cab with two Jennings O50s, also illustrated further down this page. Thanks to Cedric for the pictures.

Sold on a few years ago. Note that the amp has both the "Jennings" and later "JEI" logos. The preamp of the B50 and B100 could be sent out to a different power amp via a jack socket on the back panel.

Jennings O50 (solid state) - a version of the B50 designed for organ

A nice O50, currently advertised on this site.

All original. Thanks to Cedric for the pictures.

Replaced control knobs, but otherwise in good condition. Thanks again to Cedric for the pictures.

Jennings B100 (solid state)

JEI FR100 (solid state)

Serial number unknown - currently in Frankfurt

A simple one channel amp, presumably designed for bass, no reverb. The images were originally posted here

Sold on ebay in 2012.

Two FR100s (one amp and the cab as above), and a JEI pedal. Serial numbers of the amps: 402 and 409. Thanks to Patrik for the picture.

Public Address Amplifiers

Public Address amplifiers now on this page