The IFB300 is a ZaxNet™ transmitter that sends high-quality, fully encrypted IFB audio, timecode, and remote control commands to Zaxcom Digital Recording Wireless transmitters and ERX receivers. The signals are carried on a single RF channel ocer 2.4 GHz which can be used license-free in almost any country.

Weighing 7.3 oz, it’s constructed from an impact-resistant metal casing that’s cool to the touch. A bright OLED display provides easy menu navigation.

IFB300 Rear Panel


The TA5 audio input offers balanced stereo line level or sample rate converting AES. The BNC connector provides timecode in.

New on the IFB300 is an RS422 port for direct connection to the Zaxom GUI Bridge so you can easily setup URX50/100 and remote control your wireless via any device that can access the internet.

Encrypted Audio

The IFB300 transmits using 100% digital modulation and audio is fully encrypted to keep transmissions private, just make sure you don’t give the director an ERX with your teams private IFB feed 😉

Inernal Recording

Audio can be simultaneously transmitted and internally recorded to a microSD card using MARF (Mobile Audio Recording Format) which eliminates file corruption common to recordings due to loss of power or early card removal.

IFB300 Front Panel

The ultimate Flexibility

The IFB300 and ZGB combo gives you the ultimate remote control in the palm of your hand. You can remotely chance frequency, input level gain, output power levels, and record status right from the palm of your hand!

Specifications are subject to change without notice.