Firstly, my thanks and appreciation to Andrew for his help and lighting fast responses. I purchased a pair of 10" drivers (BSP10) to replace the Audax drivers in a high end pair of Transmission line speakers, whose cone rubbers had perished in the years I had stored them. I can honestly say that, whilst its some time since I listened to them, I am unable to find any shortfall in performance from the Bishopsound drivers in comparison, despite being about a quarter of the cost of the Audax units. They are tight, agile, musical and, importantly, well balanced and not overwhelmingly punchy. Great product, great people, great service - cannot recommend them too highly.