How to match preamp and power amp?


How to match them by looking at the preamp output impedance and the input impedance of the amp? Any magic numbers? I don't understand their relationship. Please help.
audiolui

Showing 1 response by rpnz

My Cary SLP98P is 800 ohms impedance output, the Pass Aleph 2 has 10 kohms input impedance, will this work. It’s seems so from what I have read?,  But there are more knowledgeable folks on this forum who can advise? 
I was considering a 4m run of Nordost Red Dawn RCA unbalanced interconnects, does this effect the equation? 
‘Thanks