Here we have a pair of Op-Amps working as Non-Inverting Amplifiers. The gain of the amplifier is determined by the quotient between resistance from the output to the inverting-input (Ro), divided by the resistance seen from ground to the inverting input (Ri-), plus one. So gain = (Ro/Ri-)+1. Both amplifiers here have their respective potentiometers set exactly the same, however the one on the left has a much higher overall value than it's counterpart on the right. Even so, they both have a gain of 5 at the moment. This is due to the proportion of the resistance values on either side of the input. Slide the wipers of each pot down to 10%, and see how the equation applies to gain..
