• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

K-502 How to select a potentiometer

I know that AES sent me a potentiometer with a value of 100k with the K-502 kit. But I want to replace it. How do I know what power rating to select? I could go with an 8watt one but WOW they cost like 300+. But the amp is stereo 8watt. Is there an equation? My commercial amp supplies 200watts so I would guess that the pot in there is not some crazy expensive 200watt pot. So how do you know what value to select?
I dont know if this matters or not but I am not using a pre-amp at the time.