Tom Jennings founded his UK firm in 1957 and found success with the introduction of the Vox AC15 and AC30 tube guitar amplifiers. Jennings Musical Industries was re launched in In 1997, by Richard and Justin Harrison, then owners of Hiwatt amplification UK and Music Ground Ltd. At the time the Vox brand was owned by Korg, and unlike the Korg Vox amplifiers being manufactured then, the Harrisons wanted to make exact reproductions of the original Jennings-Denney designs. In early days of the new JMI, a small number of 50W and 100W hand-wired heads were produced, as well as cabinets. In 2005 the company decided to make models JMI 15/4, JMI 30/4, JMI 30/6 and the JMI 30TV Front. The amps were made available in the classic black, smooth tolex and a 100% replica of the original fawn tolex. Other options included a choice of speakers, either Celestion Greenback or JMI (Fane made) Blue Alnico Speakers.