These are the very nice Vals I got from a friend a couple of weeks ago. I pulled the crossovers and installed a board with two sets of connectors so I can bi-amp these like I did with my 846A's with the beat up cabinets.
Everything can be switched back with no damage to the original setup. I may in the future switch the 806 compression drivers out for some 902's which will fit inside the cabinets. The 802's would require cutting a hole in the back of the cabinet and building a cover.
For amplifiers I have a MC-275 powering the 811B horns and a MC-2205 running the 416 woofers. As for listening, the only difference I hear between the A & B models is the B seems to have slightly more bass presence. Some claim they can hear the ports breathing on the B model but so far I haven't heard anything like that.
I'm just thrilled to have cabinets I don't have to cover with pieces of carpet.
Here are some pictures I took as I went along.
Click on the picture and it'll take you to a slideshow. Move your mouse around the bottom right corner of the picture and the forward-stop-backwards buttons will illuminate so you can control the slideshow.