[4] By late 1992, Kool started to promote its own events, leading to the founding of Jungle Fever in August 1993.

[7] In the same year, it branched out by launching a sister station, Kool FM Midlands based in Birmingham, which continued until 2002.

[8] In May 2007, Kool FM featured in a BBC London News report about pirate radio station interference to the emergency services and their use of the airwaves.

[10] DJs and MCs to appear on Kool have included key figures in jungle and drum and bass music, including Brockie, Det, DJ Ron, MC Navigator, Bryan Gee, MC 5-O, Moose, Andy C, Mampi Swift, DJ Dextrous, Devious D, Ragga Twins, Flirt, Skibadee, Shabba D, Nicky Blackmarket, Tonic, Stevie Hyper D, and Crissy Criss.

[13][14][15] Having announced details of the updated line-up, Kool returned on 23 April 2023 broadcasting on Rinse's FM and DAB frequencies, as well as a dedicated channel.