Would an ARC Ref 6 be a good match for a VTL S200?

I mean in terms of input and output impedance.

I'm not sure how one determine these things and I have the opportunity of buying a used Ref 6.

I'd call VTL but I bought the amp as a demo and they always ask you where you bought their products from. If they don't like how you bought it they make you feel like a criminal. Why this is so I have no idea as I thought the resale value of a component in the audio world was a selling point. Obviously these people feel you must buy one of their products and keep it for life. To give them their due their stuff is wonderful but I'd never buy another one of their products due to this attitude.