4-channel audio isolator with 4 inputs and 4 outputs. Input and output isolation with insulation withstand voltage up to 1500V AC (50–60 Hz). Low noise floor — no 50Hz AC hum or high-frequency interference. Point-to-point unbalanced analog audio transmission. Inputs and outputs accessible via front and rear panels. High common-mode rejection ratio (CMRR): 68dB @ 1kHz. Stereo channel isolation: 62dB. Plug-and-play operation — no external power supply or drivers required. Isolated, filtered audio transmission over distances up to 600 meters. Built-in transient suppression, surge protection, and ESD protection. Analog ground loop isolation and noise reduction. Insertion loss: < 0.5dB (ref. 1kHz, 1Vrms). Return loss: 18dB. Input level range: 0.5Vp-p to 3Vp-p (+6dBu max). Output level: line-level. Frequency response: 20Hz–20kHz (±0.2dB ref. 1kHz). Input impedance: 600Ω. Output impedance: 600Ω. Input interface: 4 x male RCA or 3.5mm (varies by model). Output interface: 4 x female RCA or 3.5mm (varies by model). Rated loss: < 0.5dB (ref. 1kHz, 1Vrms). Insulation resistance: 100MΩ at DC 1000V. Isolation voltage: AC 50–60Hz, 0–1500V. Housing material: Aluminum alloy. Color: Black. Package includes: 1 x Audio Isolator. Note: Actual product color may vary slightly due to screen settings and lighting conditions. Dimensions subject to a tolerance of ±1–3cm.