pre out voltage

Please help me understand the math around; output voltage of a Pre, Input Sensitivity of a Power Amp, how to find out the Gain of a Power Amp, and help me understand what can one do with that information, and how can it help me with choosing a pairing. I will be choosing either a Denon/Marantz...

Hi, I recently got a Musical Fidelity M5si integrated to drive the fronts in my 5.1 setup. It features an HT bypass function that turns one of the Aux ports into a home theater bypass at the flip of a switch on the back of the amp. However, running the system in this fashion produced very poor...