The Rolls SS412 Audio Source Selector is a top - notch passive device. It doesn't add anything to your audio signal path. No power is needed, no electronics are used, and there's no distortion. The chassis, made of 0.090' steel, is three times thicker than most. With four pairs of RCA inputs, you can connect all your audio sources, and one pair of RCA jacks for your amplifier. Connecting the SS412 is a breeze. Just connect your input source signals to the 1 - 4 RCA's on the rear panel, and the OUT RCA on the rear panel goes to your amplifier or other device. Use the volume knob to set the level. Technical specs include 4 - RCA and 1 - 1/8' TRS Stereo IN connectors, RCA OUT connectors, and it measures 5.5'w x 3.1'd x 1.6'h.

Using the Rolls SS412 Audio Source Selector is easy. First, connect your audio sources to the 1 - 4 RCA inputs on the rear panel. Then, connect the OUT RCA on the rear panel to your amplifier or other audio device. You can use the volume knob to adjust the sound level. Remember, this is a passive device, so it doesn't need power. For maintenance, keep it in a dry place and avoid dust. If there's any dirt, you can gently wipe it with a soft cloth. Don't expose it to extreme temperatures or moisture as this may damage the device.