The Zaxcom ZMT4 miniature wideband transmitter is an incredibly small, lightweight, talent friendly transmitter ideal for sound professionals. WChanges from its predecessor include 30% better power consumption, NeverClip™ in all modes, a redesigned ultra-low noise preamp, and power for all microphones, from 5V lavalier to a 48V phantom powered mic. It also features built-in backup recording with time code, full encryption, and Zaxcom High Density (ZHD) modulation, just like its larger siblings. Weighing only 2.2oz (62g), the ZMT4 is constructed from high strength, impact-resistant nylon polymer casing with rounded edges and machined metal that's cool to the touch.
The ZMT4 has a wide range of power to cover nearly any professional analog microphone - 5V lavalier mics as well as condenser, balanced dynamic, or ribbon microphones running at 12, 24, 36 or 48V.
Perfect for boom pole operation, the ZMT4 can be positioned at the top of a boom pole directly behind the microphone instead of near the bottom. By removing the internal or external cable, operators can eliminate cable noise that can affect the audio track. Boom microphone connectivity is via a 3-pin balanced LEMO.
The ZMT4 transmits using 100% digital modulation allowing audio to be fully digitally encrypted to keep all audio transmission private. A digital transmission also provides audio quality superior to analog systems.
Adaptive Antenna Optimization
This feature improves radiation of the bodypack’s antenna when it’s placed in contact or near the human body. Normally, putting a bodypack on talent decreases transmission range because the body absorbs some of the signal. With adaptive antenna optimization, the external antenna is actively matched to its condition to optimize radiation and minimize distortion, keeping the signal at its best.
The ZMT4 features a revised preamp design. The noise content of the preamp and A-D combination now utilize NeverClip™ with both lav and balanced boom mics, making the environment and self-noise of the microphone the dominant noise components.
NeverClip™ is available in all modes on the ZMT4. It works by utilizing two A-D converters to extend the dynamic range of the transmitter to 136 dB, so there’s never any limiter distortion.
Audio is simultaneously transmitted and recorded to a removable microSD card using the highly reliable MARF (Mobile Audio Recording Format) which eliminates file corruption common to recordings due to a dead battery or early card removal.
ZMT4 is equipped with ZaxNet™, a long-range remote-control system allowing the user to change the frequency, pre-amp gain, sleep mode, and place the internal recorder in record, playback, and stop modes – all without ever needing to disturb talent.
To extend battery life, PowerRoll™ adjusts the ZMT4’s power level to 50mW when the audio received from it is being recorded by a ZaxNet™ compatible recorder. When the transmitter audio isn’t being recorded, the power is automatically reduced to 10mW.
Range will always vary depending on your environment, but you’ve got choices to optimize transmission for peak performance. Zaxcom High Density modulation (ZHD) increases the number of available channels from 4 to 9 for every 1 MHz of spectrum space, perfect for reflective environments like busy city streets. XR gives you the maximum distance in less dense / more controlled spaces.
The ZMT4 has up to 30% better battery life than its predecessor. A single NP-50 battery provides up to 6 hours of runtime with a lavalier running at 5v and up to 4.5 hours of runtime while using a 12-48v boom microphone.
Starting in 2017, the 617-652 MHz and 663-698 MHz frequencies are being transitioned by the Federal Communications Commission (FCC). Users of wireless microphone devices that operate in any portion of those frequencies must cease operating on these frequencies no later than July 13, 2020. In addition, users of this device may be required to cease operations earlier than that date if their operations could cause harmful interference to a 600 MHz service licensee’s wireless operations on these frequencies. For more information, visit the FCC’s wireless microphone website at www.fcc.gov/wireless-microphones-guide or call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC).
Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device.
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