SS412 Audio Source Selector The SS412 Source Selector features an extraordinary, fully passive design that ensures a pristine audio signal path without any additions, requiring NO power, NO electronics, and NO introduction of distortion. Crafted with meticulous attention to quality, the chassis boasts a robust .090" steel construction, a striking three times thicker than standard chassis. With four pairs of RCA inputs, the SS412 facilitates seamless connections to all your audio sources, while a single pair of RCA jacks establishes a seamless link to your amplifier. Simplicity defines the setup process - just connect your input source signals to the 1-4 RCA′s on the rear panel, and you′re ready to go. Your amplifier or preferred device can be effortlessly connected through the OUT RCA located on the rear panel. Additionally, the user-friendly volume knob allows for easy level adjustments, putting you in complete control of your audio experience. Elevate your audio setup to new heights with the SS412 Source Selector - where purity, convenience, and precision converge. The SS412 chassis is made from .090" steel, meaning it is 3 times thicker than most chassis. Four pairs of RCA inputs allow for connection to all your sources, and one pair of RCA jacks to go to your amplifier. Passive design, NO power, NO electronics and NO distortion. Thick powder coated steel chassis. Four pairs of inputs and one pair of outputs with gold plated RCA jacks. High quality Bosin potentiometer used for precise volume adjustment. 100% Handcrafted in Salt Lake City, UT. SPECIFICATIONS: IN Connectors: 4 - RCA, 1 - 1/8" TRS Stereo OUT Connectors: RCA Size: 5.5"w x 3.1"d x 1.6"h