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Jennings Electronic Industries JEI J40

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Jennings Electronic Industries JEI J40

This product is Vintage or Discontinued

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Page last updated Aug 10, 2025

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Description

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The solid state Jennings J40 probably first appeared in 1968, having been introduced in time for the British Musical Industries Fair in August 1968. Mention of "transistor amplifiers from 40-100 watts" presumably encompasses the J40. At this time the company was "Jennings Electronic Developments". In 1969 it became "Jennings Electronic Industries". The J40 preceded the Jennings AC40 (an all valve descendant of the Vox AC30) by around eighteen months. In common with the Jennings J100 (and the Vox solid state line), the J40 had a three position mid-range boost switch, position "0" being off, the other three (1-3) switching in an inductor and capacitor network to provide different resonances. Speakers are Celestion alnicos, T1096s, wired in parallel for a total impedance of 15ohms.

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Amp Type

solid state

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Artist usage

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Alex Turner

Guitarist

Arctic Monkeys

Verified via Photo

Alex Turner used a vintage Jennings Electronic Industries J40 1968-1973 around the time of their second album for recording and touring. The amp can be seen in pictures of the tour and recording of Favourite Worst Nightmare, and had not been seen until Arctic Monkeys released the video "Warp Speed Chic,” which is a video about the recording of Tranquility Base Hotel and Casino. This could allow the assumption that this amp was also used on the recording of this album.

In common with the Jennings J100 (and the Vox solid state line), the J40 had a three position mid-range boost switch, position "0" being off, the other three (1-3) switching in an inductor and capacitor network to provide different resonances. Speakers are Celestion alnico's, T1096s, wired in parallel for a total impedance of 15ohms.

Album Usage

The Jennings Electronic Industries JEI J40 has been featured on the following albums:

The Car

Arctic Monkeys (2022)

Favourite Worst Nightmare (Standard Version)

Arctic Monkeys (2007)

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

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Folk, World, & Country

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1 alternative for Jennings Electronic Industries JEI J40, curated by the Equipboard community.

Vox AC30 Guitar Combo Amp Combo Guitar Amplifiers

$699.00 - $1,025.24

9 available stores

5.0 (286)

similar sound high-end alternative

After Vox went bust Tom Jennings and Dick Denny tried doing a Jennings line. The J40 is not so far from a late period JMI AC30 inside. Rare but not valuable.

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