I'm really not familiar with Vandersteen subs, but it does seem odd that they would recommend their use only with speakers that are just about full range. 40hz is pretty low and in the borderline territory of not needing a sub at all or just occasionally.
Still, according to the specs on the speakers that you're looking at, it seems that you are right in the ball park.
I'd say, give it a try. In any case, I wouldn't buy speakers to fit a sub. I'd get the speakers that I like and then match a sub to the speakers.
Still, according to the specs on the speakers that you're looking at, it seems that you are right in the ball park.
I'd say, give it a try. In any case, I wouldn't buy speakers to fit a sub. I'd get the speakers that I like and then match a sub to the speakers.