MMCX

Micro-Miniature Coaxial

Invented in

1990s

Invented by

Huber+Suhner

Availability

Common (IEMs, antennas)

The tiny snap-on connector on detachable in-ear monitor cables, and on Wi-Fi and GPS antenna leads. It clicks on, and swivels a full 360 degrees.

Technical specifications

Introduced1990s

SignalRF / audio

Impedance50 Ω

RangeDC to 6 GHz

MountSnap-on, rotating

Found on

headphonesan antenna

Recommended brands

01Shure

02Huber+Suhner

03Amphenol

Where to buy

Europe-focused retailer searches. Some links are affiliate links and may earn a commission.

Common adapters and cables

MMCX to SMA pigtail

Wi-Fi card or GPS module to an external antenna.

Fun fact

That swivel is why good in-ear cables rotate freely at the earpiece; it stops the cable twisting and breaking.

Tips & tricks

Pull straight off, never lever sideways: the centre pin bends and the socket loosens.

Philosophy

A radio-frequency connector that found fame in audiophile earphones. Sometimes the best tech crosses over.

Applications

Hi-FiPro audioInternet