Output "impendance" of PRE is mismatch with Input "inpendance" of the amp. Bigger the difference, between the two "imendancie's", better match! Idealy ratio 100:1 (10kohm-100ohm) Good Luck!
2 Pre amps: Huge volume difference??
I am testing two pre amps (different models) of the same manufacturer. On one of the pre amps, the more expensive one, I have to increase the volume significantly to get the same volume as the other pre amp. What the heck is going on? My amp seems to be working harder.