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Small black box with three 3.5mm jacks and a switch button

cooidea A07 3.5mm Bi-Directional Audio Switch 1 In 2 Out

SKU CH-48YQ-FMA1F

A bi-directional 3.5 mm audio switch with one common port and two selectable channels for TS, TRS and TRRS plugs, measuring 40 x 38 x 10 mm and weighing .03 kg

  • Type3.5mm Jack
  • Changer TypeAuxiliary
  • Ports2
  • Cable Length1
  • Input Connector2
  • Dimensions4.0 in x 3.8 in x 1.0 in
  • Switch between two audio sources or outputs with one button
  • Works with TS, TRS and TRRS plugs including CTIA and OMTP headsets
  • Gold-plated contacts eliminate ground-loop noise for clear sound
  • No power needed — just plug in and press to switch
  • Compact 40 x 38 x 10 mm body weighs only 0.03 kg

3.5mm Bi-Directional Audio Switch

The cooidea A07 is a passive 3.5mm jack selector that routes stereo or TRRS signals between one common port and two channels. It serves desktop users who want to share headphones or speakers between a PC and a phone without unplugging cables. Builders needing more than two zones or digital switching should look elsewhere.

Manual Switching Limits

The switch operates in two modes: 1×2 splits a single source to two outputs, while 2×1 selects between two sources to one output. Only one path is active at a time, so simultaneous playback to both outputs is not possible. No external power is required, but the mechanical button must be pressed for every change.

TRRS CTIA OMTP Compatibility

Full support for TS, TRS and TRRS plugs covering both CTIA and OMTP wiring means microphone and remote functions pass through on four-pole headsets. Gold-plated contacts and a low-impedance path prevent ground-loop hum when interconnecting mains-powered gear. The included 1 m TRRS cable completes the link for most desktop setups.

Highlights

  • Switch between two audio sources or outputs with one button
  • Works with TS, TRS and TRRS plugs including CTIA and OMTP headsets
  • Gold-plated contacts eliminate ground-loop noise for clear sound
  • No power needed — just plug in and press to switch
  • Compact 40 x 38 x 10 mm body weighs only 0.03 kg

Specifications

Brandcooidea
ModelA07
Part NumberA07-AU
Type3.5mm Jack
Changer TypeAuxiliary
Ports2
Cable Length1
Input Connector2
Dimensions4.0 in x 3.8 in x 1.0 in
Weight0.03 kilograms

Questions about this item

Should I choose the 1×2 or 2×1 wiring for my setup?

Use 1×2 when one source feeds two headphones or speakers; use 2×1 when two sources share one headset or amplifier. The front button toggles between the two channels.

What does “no ground loop noise” mean once the switch is in my system?

The full-signal switching and low-impedance path prevent the hum that often appears when a laptop and phone are grounded together, so music stays clean.

Which 3.5 mm standards does the A07 support, and what does that cap in practice?

It handles TS, TRS and TRRS plugs under both CTIA and OMTP wiring, so stereo audio and inline microphone signals pass through without adapter cables.

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