On 21/04/2020 15:41, John Murphy wrote: > I need 6dB gain in the jack-rack Stereo Amplifier. What number > should I put for the 'Gain' amount? Or, what does the number > there refer to? Assuming it really is "gain" and my brain isn't totally fried - you should use "2". I.e. 10^(6/20) = 2 HTH R