Never heard of these before--or the manufacturer "Klein and Hummel"--interesting design incorporating Altec drivers and crossovers. Pricey but if I had money to burn they'd be a cool/unique addition to my collection......

http://cgi.ebay.com/ALTEC-K-H-tube-s...item4aa9dbb56e

I'm wondering if these would be prone to microphonics--having the amp and speakers in the same cab--could that be a problem at high listening levels?