Thanks for all the great responses guys. I was away over the weekend and had no computer access. The drivers should be here on thursday.
I have been using the cabinets for a couple of months with out a sub and have been happy with the bass response so i am not to concerened with using them with out a sub. I love the effecency i get out of the system as a whole. Normal listening levels the signal lights on my amps hardly ever light up. Getting the altec drivers back in them sould be a good move.
allen