Amplifier 'gain' on NAD T773?

You don't have to match it exactly. That's why amps have gain controls on them, so you can match them with other amps.

Good luck finding the amp gain for the main in! If they don't list it in the specs, there's no simple way to find out. You would need to run a test signal in with a known peak voltage, and be able to measure the peak voltage at the output.

Good point, I don't see gain controls. Well heck, how do they expect to match this to another amp. Kind of a bummer.

You can also use channel trims on your receiver to attempt to match. Hopefully the gain is not a lot different than Emotiva amps.

I can take a guess at your gain though.

Input sensitivity is given as -
1.2V / 50k ohms

Power is given at 145 watts. Using power = v^2 / r, we get about 34 volts at full power.

Gain is then 20 * log ( 34 / 1.2) or 29 dB.

Sure, good luck