Quick Answer / Summary: Confirm the lavalier’s pinout family – Sennheiser/Marlboro, Shure, Sony, or Draeger – before ordering a mini XLR to 3.5 mm cable, and confirm the camera supplies 3 to 5 volts of plug-in power rather than +48V phantom (cameras do not, but XLR-equipped field recorders sometimes do). The 3.5 mm end is almost always mono: audio on the tip or ring per the camera’s spec, sleeve to ground.
A mini XLR (4-pin lavalier) to 3.5 mm cable connects a lapel microphone to a camera or field recorder’s 3.5 mm mic input – but mini XLR pinouts are not standardized across brands. A cable wired for one brand’s pinout on another brand’s lavalier can feed the wrong supply voltage into a mic designed for 3 to 5 volts of plug-in power. This guide maps the published pinout families, states the power rules that protect the microphone, and gives the 3.5 mm end wiring for camera inputs.
Four Mini XLR Pinout Families
Every major lavalier manufacturer uses a 4-pin mini XLR, but the assignment of audio, ground, and supply to pins 1 through 4 differs. The four published families below cover the vast majority of professional lavaliers in circulation. The table is a starting map, not a substitute for the specific microphone’s manual – a wrong supply pin is how lavaliers get destroyed, so verify against the mic’s own documentation before crimping or ordering.
Plug-in Power: 3-5V vs +48V Phantom
Lavalier microphones are powered from the device they plug into, and the voltage is the safety parameter. Cameras and most field recorders supply 3 to 5 volts on the 3.5 mm mic jack – called plug-in power – which lavaliers are designed for. XLR condenser inputs supply +48V phantom power, a completely different system. The two must never be mixed: routing +48V into a lavalier designed for 3 to 5V destroys the microphone’s electronics, and the cable cannot block it because the supply rides the same conductors as the signal.
Camera 3.5 mm Inputs (Plug-in Power)
The normal destination for a mini XLR lavalier. The camera provides 3 to 5V on the supply pin, the microphone’s audio rides back on its audio pin, and the 3.5 mm end of the cable presents mono audio plus ground to the camera’s mic jack. This is a safe, matched system.
Never Route Phantom Into a Lavalier
If the chain includes an XLR field recorder with phantom power, keep phantom OFF while the lavalier is connected via a 3.5 mm jack, or insert a proper transformer-isolated stage. There is no passive cable that converts +48V phantom into 3-5V plug-in power safely.
3.5 mm End Wiring for Camera Inputs
Camera 3.5 mm mic jacks are mono: the audio lands on the tip or first ring depending on the camera, and the sleeve is ground. The cable’s 3.5 mm end is therefore a mono build – one audio conductor, one ground – regardless of the mini XLR’s four pins. Verify the specific camera’s pinout if the audio arrives on the wrong pole, because a small number of cameras place mic audio on the ring rather than the tip.
Published Mini XLR 4-Pin Pinout Families
| Family | Pin 1 | Pin 2 | Pin 3 | Pin 4 | Note |
|---|---|---|---|---|---|
| Sennheiser / Marlboro | Audio | Ground | Supply | Supply 2 | Verify against mic manual |
| Shure | NC | Ground | NC | Supply | Verify against mic manual |
| Sony | Audio | Supply | NC | Ground | Verify against mic manual |
| Draeger / Bosch | Ground | Audio | NC | Supply | Verify against mic manual |
Real-World Application Scenarios
Wedding and event video, where a lavalier on the speaker feeds the camera’s 3.5 mm mic input through a hidden run. Corporate video production, where two lavaliers share one camera via a 3.5 mm input on alternating takes. Documentary work, where the camera’s plug-in power is the only supply available on location. Conference camera setups, where the lavalier cable must survive repeated daily connection and disconnection, making connector quality the deciding spec.
Recommended Internal Resources
Editorial Note: Internal linking recommendation: (1) Product cluster – https://zh-zong.com/productlist/ (anchor: explore factory-certified XLR to 3.5 mm adapter options, braided balanced audio cables, and pro converters); (2) Related guide – https://zh-zong.com/video-usb-adapter-converter-guide/ (anchor: analog audio and audio adapter converter guide); (3) Conversion – https://zh-zong.com/contact/ (anchor: contact the sales engineering team for mini XLR to 3.5 mm lavalier cables with pinout verification against your specific microphone model).
Frequently Asked Questions (FAQ)
Q: Can I use a Sennheiser mini XLR cable on a Sony lavalier?
A: Do not assume it. The pinout families differ, and the supply pin in particular can feed the wrong voltage into the microphone. Confirm both devices’ pinouts and order a cable wired for the lavalier’s family, or a universal build that matches the specific mic.
Q: Does my camera supply power over the 3.5 mm mic jack?
A: Most do, at 3 to 5 volts of plug-in power, which is what lavalier microphones expect. Check the camera manual for the exact voltage and whether plug-in power is a user-selectable setting, because some cameras require it to be enabled for external mics.
Q: Is a mini XLR to 3.5 mm cable stereo?
A: No. Lavalier microphones are mono, and camera 3.5 mm mic inputs are mono. The cable carries one audio channel plus ground, with the remaining mini XLR pins handling supply per the lavalier’s pinout family.