First I got the title info wrong but it won't let me change it. I believe these drivers are designated MK2 300 or 3000. I don't remember which.
I bought this pair of Ohm Drivers as part of an upgrade package. I built my own cabinet with some direction from the guy at Ohm. Sounded wonderful, used moderately in smoke and pet free environment. Sent them to Ohm for a check up when I had some output problems with one. Sent them in to Ohm to be fixed, Got em back after a few weeks but by then I was on to a new design with the Manger BWT. So, they've sat for the last 4 years. If you're a DIY guy these make a great and relatively easy speaker building project.