I've manged to get hold of the speakers I've dreamed of since I saw them in the B&O showroom window in Warrington in 1990, when I was 17 years old - Beolab Penta! I've connected them to My Beosound 4 using the Powerlink cables that are usually connected to my Beolab 6000s and they are working with those, but the display isn't coming on. I've heard people mention there are different types of Powerlink cables, so I'm wondering if my existing ones (bought only a few months ago and listed by the seller as 'Powerlink Mk3') are the wrong type; do I need Powerlink Mk2 cables instead?  I think I do, but before I order them, just wanted to be sure! Other than that I think I've snapped up a real bargain here - a couple of small  marks on the base of one of them, but the cabinets don't have a mark on them; a couple of loose bits, but unbroken and easily fixed.  Four of the middle speakers need new foams but even so, they sound pretty good, and will sound even better when I replace those foams (a job I've done before on my CX50s). Also, they were sold as Mk2 but the type number is 6632 - I think that makes them Mk3, am I right?