With dance music's big names slowly becoming endangered species, Groove Armada have learned about evolution. Originally kings of chillout, they re-emerged as a turbocharged funk act whose music featured on commercials and trailers.

Now, they have reinvented themselves as a full-on techno-rock band with all the trappings, including long hair (although, at this stage, this is limited to the percussionist). Perhaps most surprisingly, dance's most schoolteacherly group pull it off in a manner suggesting they may have secretly spent their youth playing air guitar.

The stage instrumentation could be shared with Iron Maiden: drums, percussion, keyboards and lots of guitars. Songs begin with proggy atmospherics or massive, Queen-like drum thuds. The light show is pure Pink Floyd, and perhaps if Floyd had dealt in acid house instead of psychedelia, this is how they would have sounded. Everything from Bollywood to reggae is channelled through old dance amplifiers that have presumably been tweaked to go up to 11.

Ostensibly, the Armada are sailing to promote September's greatest hits album, but delivering reworked versions of their hits is a neat way of both evoking and side-stepping nostalgia. Rocking track Madder now sounds like Orbital playing Motorhead. I See You Baby has more riffs and more accompanying films of bottoms than before. Long-term Armada watchers will be relived that Andy Cato still plays woozy trombone.

Gradually, they filter in more dance and less rock. Only dance-rap Superstylin' is totally unchanged, as thousands forget their new-found love for axe solos and submit to house-era hysteria.

· At Leeds University Union tomorrow. Box office: 0113-380 1234. Then touring.