Ken,
I bought them that way. Over the years the panels eventually failed so QS&D replaced them about a year ago. The amazing thing to me about this setup is that it seems to play much louder using the analog source vs. the digital source before the protection circuitry engages. As far as MFA's driving them , I think it's a great match, although to be honest, I think any quality amp driven by this preamp would be a good match.
