Black Lion Audio LS-4 Passive Line Selector

The Black Lion Audio LS-4 is a compact, 100% passive line selector that routes one stereo source to up to four stereo destinations—simultaneously or in any combination—without adding any color, noise, or signal degradation to the path. Its small footprint and zero-power design make it an immediately practical tool for passive monitor switching, headphone distribution, effects chain auditioning, and parallel effects recording. An internal ground lift is available per channel to address hum and ground loop issues without additional hardware. With 2-in and 8-out connectivity in a 5.5 × 4.9 × 1.6 inch chassis, the LS-4 solves a wide range of studio routing problems with minimal desk impact.

Key Features

• 100% passive design — zero tone color, no power supply required, no added noise or distortion
• 1 stereo input, 4 stereo outputs — send the source to any or all four destinations simultaneously via buttons A–D
• Internal ground lift per channel — addresses hum and ground loop issues without an external device
• Passive monitor switching — connect up to three monitor pairs to Outputs A, B, and C; assign a subwoofer to Output D for a subwoofer toggle
• Headphone distribution — feed the interface headphone output into the LS-4 and distribute to multiple headphone amplifiers via Outputs A–D
• Effects chain auditioning and parallel recording — connect different processors to each output and press A–D to audition independently, or record all four parallel-processed signals to a DAW simultaneously
• Compact form factor — small footprint suitable for desktop or pedalboard integration

Specifications

• Configuration: 2-in / 8-out (1 stereo input, 4 stereo outputs)
• Design: 100% passive
• Ground Lift: Internal, per channel
• Width: 5.5 in. (140 mm)
• Depth: 4.9 in. (124 mm)
• Height: 1.6 in. (40 mm)
• Weight: 1.6 lbs (726 g)