The Rolls SS412 is a passive analog stereo audio source selector offering easy switching between line-level inputs for musicians, DJs, and audio engineers in homes, studios, and live stage applications. Its gold-plated I/O connectors include four pairs of RCA inputs, a 3.5mm stereo mini jack, and one pair of RCA outputs. The front-panel level knob adjusts the volume of the current input, which is chosen via the 4-position source selector. Being passive, the SS412 requires no power and adds no distortion. It is handcrafted in the USA, boasting a thick, rugged steel chassis and a compact size. Specifications Passive design requires no power source Made with no electronics to ensure no distortion is added Bosin potentiometer for precise volume adjustment Thick powder-coated steel chassis Gold-plated I/O connectors Four pairs of RCA inputs and a 3.5mm mini jack allow connection of multiple stereo sources such as mixers, CD players, and mobile devices One pair of RCA outputs for easy routing to an amplifier or active speakers Handcrafted in Salt Lake City, Utah