There is no tone stack or settings apart from output volume. This purist approach yields a warm, round, unmistakable boost that you'll never want to turn off and never need to fidget with.
The Edison is particularly effective to warm up digital or solid state amplifiers, and can also be used in an effect loop as a power amp boost. The Edison runs on standard 9V power, center negative, and requires 250ma. The preamp arrives in a custom wooden crate with our cross logo branded on it.