D-Lab presents, easy quick addition of Master volume to your Marshall tube guitar amplifier. There are many complaints of noisy harsh Marshall amps. How to tame them? Well, adding a Master will throttle the grids of the output tubes, resulting in less noise when playing lower volumes. This is the post inverter system. Best choice without affecting the tone of your amp. Triode electronics offers a kit and full instructions for this update. You can also acquire the parts required, follow the instructions on this video and achieve the same thing. If you would like a copy of my quick instructions, simply e-mail me. This mod will work on 50-100 watt Marshalls and Yes, Fenders.