OK - update - I think I just answered my own question. I just realised I can listen to each of the tracks on the DMB website. Even listening to compressed streaming over the www with average headphones there is no trace of the distortion I am hearing on my home setup - I guess it's not in the track. On the flip-side it makes me realise (again) how good the Axiom's sound. Aside from my current distortion issue there is a world of difference from my average headphones in the office to my home axiom setup! Guess I'll email Axiom now...

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1