Mini Stereo 4-Channel Line Mixer Key benefits Combine up to four stereo RCA sources into a single stereo RCA output for simple, reliable signal routing. Passive design (4-channel passive mixer) that requires no power supply, making it easy to deploy and transport. Dedicated level controls for inputs 1–4 provide stable performance and sensitive signal adjustment for precise balancing of sources. What it does Inputs and output: Four stereo RCA inputs and one stereo RCA output let you connect CD players, cassette decks, computers, mobile phones, tablets, instruments or other line-level devices and route them to a mixer, recorder, amplifier or powered speakers. Level control: Individual controls for IN 1–4 allow you to set the relative volume of each source quickly and accurately without changing source settings. Connectivity role: Acts as a compact junction between multiple RCA-equipped devices and your main mixer or output device, simplifying signal management in small setups. Why you need it Eliminates cable swapping and manual source switching by keeping multiple line-level devices connected and ready. Passive, compact design reduces setup complexity and power needs, ideal for mobile or minimalist installations. Stable performance and sensitive control help maintain consistent audio levels during rehearsals, recording sessions, presentations or live sets. Typical uses Home studio: Blend playback from a computer, CD player, and hardware instrument into one stereo feed for recording or monitoring. Small live setup or DJ station: Keep multiple audio sources connected and control their levels before sending to the house mixer or amplifier. Classroom, conference or multimedia presentations: Quickly switch and balance phones, tablets, and laptops feeding a single output to a PA or recorder. Specifications (as provided) 4 stereo RCA inputs 1 stereo RCA output 4-channel passive line mixer with individual level controls for IN 1–4 Designed for use with mixing consoles, instruments, CD players, cassette players, computers, mobile phones, tablets, and other line-level RCA devices Simple, compact, and effective for managing multiple RCA-equipped audio sources without added power or complexity.