PORTSMOUTH Wedgewood Rooms will launch 1Xtra's 2005 Xtra Bass Week tonight with a drum and bass marathon led by DJs Friction and Andy C and MCs SP-MC and 2Shy.

Xtra Bass Week will broadcast 24 hours of live radio and will be touching down in ten cities across six days, with some of the freshest drum and bass talent in the UK right now.

After tonight, the tour visits Cardiff, Nottingham, Sheffield, London, Cambridge, Liverpool, Belfast, Manchester and Bristol. All ten shows will be broadcast on 1Xtra, with tonight's set from midnight to 2am.

Log on to www.bbc.co.uk/1Xtra for ticket details.