I used to own the model 4A (see pic on this link):
http://www.6moons.com/industryfeatures/forbidden/forbidden_8.html
It was the biggest Vandys in the 90s, 5-way, tri-wireable, with an external active crossover.
See more info on it here:
http://trade.audioasylum.com/ca/listing/Speakers-Full-Range/Vandersteen/4a/w-WX-4-SC/25847
Its sound is similar to the old Vandy design - balanced, if a little reticent. I bi-wired them with Transcendent Sound SC-150 on top and a pair of Odyssey Stratos at the bottom.
They sounded neutral for all kinds of music but not as dynamic as the new Vandy models.
I finally sold them because they were too big even for my great room. You will need a big room for them to sound good.