During the late 1990s while Tipper was busy in the studio, Richie Warren & Co conceptualised the Fuel Sound System. This consisted of 2 identical black 1970s Dodge Challengers, both fitted with 6 x18" subwoofers (replacing where the back seats had previously been) and a Funktion-One mid/tops speaker unit, that could be raised out of the trunk on hydraulics with the flick of a switch from the driver's dashboard. These cars were able to run independently, without the need for an electrical generator, using 6 batteries charged via an alternator salvaged out of a lorry. With a totally discreet and fully mobile sound system, the Fuel crew, assuming the role of sonic pranksters, began a "pilgrimage" of sound that took them on tour to various music festivals, parties & spontaneous gatherings, setting them up outside events and garnering attention for the label and its artists. One of the urban myths surrounding these appearances recounts the incident at the 1997 V Festival, when Richie Warren received complaints from The Prodigy's stage manager, because the band couldn't hear itself due to the excess volume.
With this activity as a backdrop, Tipper released his second album Holding Pattern in early 2001. Many of the individual tracks from this album found their way into DJ boxes internationally, and accordingly Tipper began touring extensively through Europe, the United States and Australia. Reflecting his travels was the DJ Mix album Sound Off which he completed for Fuel later the same year. Tipper focused on the music, and Richie promoted a lifestyle – taking the cars wherever possible to create a happening around both.
- from https://en.wikipedia.org/wiki/David_Tipper#The_Fuel_years