 Kool first broadcast on 28 November 1991 on the frequency of 94.5FM, from Hackney, East London.Kool has stated that it was ""the very first pirate station ever to play hardcore jungle"".Simon Reynolds would call it ""London's ruling pirate station"" in an account of the beginnings of jungle in his book Energy Flash, whilst in State of Bass, Martin James would consider it ""The single most important pirate station in jungle"".