hmm, must be something wrong with mine then, cos i dont think the noise im getting is worth 200 quid - im not even sure its worth 100 quid. Apart from the hum ive noticed that the treble has problems, dont know if its distortion, but it sounds like the transients are blurred or getting stuck. Its most prominent on guitars etc, (a good one is Sting's Shape of My Heart) The volume is not that high at all (i know these are low powered). Maybe a different set of valves would help. Anyone experience anything like this? (speakers not overly sensitive - 88db, but shouldnt be a problem at the volumes im using)