RCA Audio Switch Selector Box 1 In 4 Out or 4 In 1 Out L R Sound Channel HiFi Audio Switch Box for DVD Stereo Speaker CD Player

4-Way Bi-Directional RCA Stereo Audio Switcher — 4 in 1 Out / 1 in 4 OutA passive L/R RCA audio switch for anyone with several sources and speakers. Choose between two modes: switch 4 audio sources to 1 amplifier/speaker system, or send 1 source to 4 amplifiers/speaker sets — no plugging and unplugging, no messy cables. Two front knobs let you select the channel and adjust volume independently.1、Bi-directional, two modes：4-in/1-out (four sources to one amp) or 1-in/4-out (one source to four amps); just switch and listen.2、Dual control knobs：1/2/3/4 selector knob picks the channel, and a separate volume knob adjusts output level accurately and avoids sudden loud pops.3、Passive, plug and play：No power supply, no software, no drivers; runs straight from the analog signal.4、Pure analog sound：Analog signal up to 1.2V p-p, 20Hz–20kHz response, low interference, clean and tidy on your desk.5、All-metal build：Sturdy all-metal housing, compact and neat, fits any desktop or office.6、Wide compatibility：Works with any L/R audio device: legacy systems, game consoles, CD/DVD player, TV, DAC, tape deck, tuner, tube amplifier, digital amp, headphone amp, phone, pad, PC, set-top box and more.Two ways to use it4 in, 1 out — Switch four sources (PC, phone, set-top box, DVD…) to one audio system.1 in, 4 out — Send one source to four destinations (speakers, amp, headset, tube amp…).