I drove a pair of Spendor 1/2e's with my BAT VK75. I've read that the Spendors respond differently to tube than transister amplification. With the BAT, they were quite lovely. Easily driven, and very rich midrange, especially. In fact, cranking them up with orchestral music was a particular pleasure...the sound just got bigger--no harshness or glare, and still very good definition. (In fact, I need to go hook that combo up again...)