4-Channel RCA Stereo Audio Selector

Measurements: approx. 107 mm (W) × 92 mm (D) × 40 mm (H). Enclosure: rigid black metal housing with matte finish. Connectivity: six standard RCA phono jacks — configurable as either two inputs/four outputs or four inputs/two outputs. Fully passive design: operates without power, batteries or software. Compatible with all RCA-based audio gear — including legacy Windows XP sound cards, turntables with preamp outputs, active bookshelf speakers, and portable DACs. No drivers, updates or configuration required. The core switching mechanism is a heavy-duty 4-position rotary switch with silver-alloy contacts, delivering low-contact resistance and consistent channel separation. Each output path includes a front-panel volume control for real-time level adjustment. Internal wiring uses shielded, twisted-pair construction where appropriate, and grounding is routed separately per channel to avoid ground-loop hum in mixed-source setups. Commonly deployed in hybrid home offices (switching between Zoom calls, music streaming and gaming audio), community radio booths (routing multiple mic/line sources to transmitter and studio monitor), and retail display areas (sending background music to four distinct zones with custom volume per department) — always maintaining sonic transparency and operational simplicity.