listen to these pretty old mix cds to get a clear picture of what techno should sound like:

escapism part 1 - ben sims
world service part 1 - dave clarke
fear and loathing part 1 - luke slater
essential underground volume 7 disc 2 - ben sims
fuse presents charles siegling (technasia)
timewarp volume 4 - umek
wetmusik mixup volume 5 - simon coyle
fabric live 22 mixed by adam beyer

....to name a few.......