A small piece of circuitry that Brian included inside his Red Special for a time before removing it once it became surplus to requirements.

Brian May; “It was called a Vox Distortion Booster, I think, and it came in a little rectangular, red box with a jack plug on the end. It was a fuzz box really, and you’d plug it into your amp, and your guitar into it. I remember, even in those days, that I would rather have the amp and guitar flat out to try and get the feedback naturally. But we would be in small studios and they wouldn’t let me turn up, and the only way to get any sustain at all quietly was to use something like that, a saturation box.”

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