energeezer Assuming you have an impedance mismatch between your pre and power amp is there a device which will correct or compensate for this?There are no set rules:
I say with all the listening/measurements I’ve done if the output impedance of the source is 10 or more times lower than the device it’s driving into, your fine.
If it’s not then a buffer is needed.
I’m suspicious because I found the Sumo to sound as good if not better than the Aragon in my system.Two different amps, you preferred one over the other, and there is a gain difference between the two.
Cheers George