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

5.00 out of 5 based on 1 customer rating
(1 customer review)

Original price was: 289.00 €.Current price is: 199.00 €.

ZERO SIGNAL LEAKAGE BETWEEN I/O PATHS!
ONLY THE SELECTED SIGNAL PATH IS ACTIVE!
ALL OTHER I/O PATHS ARE FULLY ISOLATED!
NO SHARED OUTPUT AUDIO GROUND!
NO STEREO CROSSTALK!
NO STEREO IMAGE COLLAPSE!
NO ACTIVE ELECTRONICS IN THE SIGNAL PATH!
PURE PASSIVE STEREO SIGNAL ROUTING!

Hand-built passive RCA stereo router

  • Routes one stereo input to three selectable stereo outputs (A/B/C)
  • Signal + ground switching for each output
  • No shared audio ground between outputs
  • Galvanically isolated non-selected outputs
  • Break-Before-Make (BBM) switching
  • Prevents signal leakage and crosstalk between connected output devices
  • Pure passive signal path — no active electronics in the audio path
  • Direct, uncolored signal transmission
  • Designed to preserve the original stereo image without processing or alteration
Category: ,

1-Way IN / 3-Way OUT Audio RCA Hi-Fi Studio Switch Box – BBM Switching & Ground Isolated

 

1-Way Stereo (2-Channel) IN / 3-Way Stereo (6-Channel) OUT – Passive RCA Signal Routing

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: Each output audio signal and audio ground is fully independent. The audio ground connection exists only between the input and the currently selected output. Non-selected outputs are fully isolated — both signal and ground — preventing signal leakage, cross-talk, and ground loops within the switcher itself.
  • Chassis Grounding: The aluminum enclosure is connected to the input RCA ground for RFI (Radio Frequency Interference) shielding. This does not create a common audio-ground connection between the outputs.
  • Isolated 3-Way Switching: The switch simultaneously disconnects both Signal (L/R) and Ground (L/R) of each non-selected output, providing electrical isolation between the connected audio chains within the switcher.
  • BBM Switching (Break-Before-Make): The rotary switch disconnects the current output before connecting the next one, preventing any momentary connection between output devices and minimizing switching pops.
  • Pure Passive Signal Path: No active electronics, buffering, or circuitry is placed in the audio signal path, providing direct, uncolored signal transmission.

 

  • System Note: The switcher eliminates unwanted signal leakage and ground-loop paths caused by the switcher itself. Ground loops, noise, or crosstalk caused by other equipment or additional connections elsewhere in the audio system are outside the switcher’s control.

Specifications:

  • Input: 2 x RCA (Stereo L/R)
  • Outputs: 6 x RCA (3 x Stereo L/R – A, B, C)
  • 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! 

Customer request: The IN will be a line-level signal (a TS or TRS send from my MOTU 828ES interface).  The 8 OUTS will be patched to TS RCA INS of the 238.  So yes, the switch is placed between the mic preamp out and the Tascam 238

CUSTOM NAME?

YES PLEASE, NO THANKS
KNOB STYLE

ROUND BLACK, VINTAGE WHITE, VINTAGE BLACK
BUILD TIME

10 DAYS

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

5.00 out of 5 stars

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  1. Reviewer profile image
    5 out of 5

    Ivan P. –

    Exactly what a proper HiFi switcher should be

    Needed to route one DAC output to three diferent amps without any ground loop nonsense or crosstalk between them. This does it perfectly. The BBM rotary mechanicaly breaks before making contact so there's no momentary short between devices — every audiophile knows why that matters.
    Ground isolation between unused outputs is the bit most cheap switchers completly ignore. This one gets it right. Dead quiet, zero coloration, passive and no power needed. Solid aluminium box, nice knob. 10 days build. Thanks Paul! Recomend.

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