I have not tried a different lead to the PSU as it has a big thick jobbie already. I did think that the speaker cable could make a difference as the importer recommends some very very expensive stuff called Audience.. But on the basis of what I have heard I can't see the point... I would welcome your suggestions WM as although I am happy, I also like to play around and improve what I have too... the one caveat is I always test these things blind and that seems to make a difference...