Here is where things get ugly, both bass drivers have perished surrounds, but I knew that when I bought them, that's why they were so cheap. Within a minute of winning them in an auction on Fleabay I also had an offer of £80 accepted for a pair of early 66 bass drivers that looked in great condition, they will be going in as soon as possible. Strangely enough the two original drivers still measure the correct resistance so I will keep them for now.