3-In / 1-Out RCA Hi-Fi Studio Switch Box – BBM & Ground Isolated

Technical Configuration & Grounding Logic
Designed for high-end audio routing, this unit prioritizes signal integrity and ground isolation. Unlike typical switchers that share a common ground, this build ensures unused outputs remain completely disconnected.

• Ground Isolation: Output grounds are fully independent. The ground connection exists only between the input and the currently selected output. Non-selected outputs are fully isolated (signal and ground), preventing ground loops and cross-talk between multiple amplifiers.
• Chassis Grounding: The aluminum enclosure is grounded via the input RCA to provide RFI (Radio Frequency Interference) shielding.
• BBM Switching (Break-Before-Make): The 3-position rotary switch mechanically disconnects the current channel before connecting the next, preventing any momentary short circuits between output devices.
• Isolated 3-way Switching: Simultaneously switches both Signal (L/R) and Ground (L/R) for each output.

Specifications:

• Input: 6 x RCA (3x Stereo L/R – A, B, C)
• Outputs: 2 x RCA (1 x Stereo L/R)
• Switch Type: 3-Position Stereo Balanced Precision Rotary (BBM)
• Enclosure: Shielded desktop mini box (Aluminum)
• Operation: 100% Passive (No power required)
• Labels: Custom output engraving available (A/B/C or custom names)

You can get as many channels and options as you want, so let’s build your gear!

Build time: 10 Working Weekdays after cleared payment

Do not find your controller or switcher? Tell me what you need and I build for you!