While I can't give you a direct answer, I can suggest that you go to the Harbeth website, where there are faqs and a forum for Harbeth users. I looked at it a while back (when I got my Harbeth M30s) and my recollection is that, frankly, Harbeth is not too picky about electronics or cables (at least in theory). I recall Alan Shaw, the owner, remarking to the effect that he wants the Harbeths to work well with relatively modest equipment. I use Cardas Cross, myself, which I think is just a basic, but very high quality copper cable that leans to the warm side.
Despite what Shaw says, I've found the Harbeths to be fairly sensitive to the equipment that feeds them. It's been my intention to buy a set of the better Linn speaker cables and try those, just for fun. I think they should be just fine.
Despite what Shaw says, I've found the Harbeths to be fairly sensitive to the equipment that feeds them. It's been my intention to buy a set of the better Linn speaker cables and try those, just for fun. I think they should be just fine.