The thread on power amps got me thinking, and I didn't want to hijack it.
 
Interesting about balancing the input and output impedance. Where could I go to find out more? I'm currently running an ART tube channel (output impedance 300ohms) into a Carvin DCM1000 (input impedance >20Kohms).

Hello,
            This is an topic that I could explain to you in great length or offer you a good link that I think answers many concerns and will satisfy your curiosity on this topic. Here is in my judgement a good link; A whole page !
http://www.deltamedia.com/resource/impedance.html

Thank you neyman for posting the question. Sonicus thank you for posting the answer via the link!

Wolf you've done it again!
Is there no end to the amount of knowledge this man possesses?
 
slawie

Slawie, you could have done just as well !  LOL !!