LaChapell Audio preamps are unique in how they provide gain control to the user. Our Dual Drive knobs provide separate INPUT and OUTPUT gain controls for increased sonic flexibility. This is key to LaChapell Audio’s reputation of being so versatile. In short, the INPUT gain control is where you can dial in harmonic color. The OUTPUT control drives the very clean, natural sounding output stage. The contrast isn’t extreme, but discovering the perfect balance between these controls for whatever might be connected to the preamp is what makes LaChapell Audio preamps so much fun to use.