Zaxcom ZMT4 Digital Wireless Transmitter
- Encrypted digital transmitter with internal recording
- Micro LEMO input for 5 V lavs and phantom mics
- Up to 7 hours on one NP-50 Pro battery
From $2,095.00 USD
Zaxcom ZMT4 Digital Wireless Transmitter
The Zaxcom ZMT4 is a digital wireless transmitter small enough to hide on talent, mount behind a shotgun mic on a boom, or pair with a plant mic.
It sends fully encrypted digital audio and records the same audio, with timecode, to a microSD card inside the transmitter. Recordings use Zaxcom’s MARF format, which keeps the file intact if the battery dies or the card comes out early.
Microphones and Power
A 3-pin micro LEMO input takes unbalanced 5 V lavaliers and balanced mics that need phantom power. On a boom the ZMT4 sits right behind the mic, with no cable to pick up handling noise.
One NP-50 Pro battery runs it for up to 7 hours with a 5 V lavalier and up to 5 hours with a 48 V phantom-powered mic.
ZaxNet Remote Control
ZaxNet is Zaxcom’s 2.4 GHz control link. From a ZRC remote or any ZaxNet device, the operator can change the frequency, output power, and input gain, start and stop the recorder, manage timecode, and format the card without touching the talent. Quality-control audio also goes out over ZaxNet, so the mic can be checked on the spot with an ERX receiver.
NeverClip and ZHD
NeverClip extends the dynamic range to 136 dB, which leaves headroom for sudden loud sounds without riding the gain. ZHD modulation fits more channels into each megahertz of spectrum, with Mono, Stereo, XR, ZHD48, and ZHD96 modes for crowded RF environments.
Frequency Bands
The ZMT4 comes in two bands: 512 to 608 MHz for the United States and 578 to 698 MHz for use outside the US.
Features
- Encrypted digital transmission
- Internal microSD recording with timecode
- 3-pin micro LEMO input for 5 V lavaliers and phantom-powered mics
- NeverClip, 136 dB dynamic range
- ZaxNet remote control and quality-control audio
- Mono, Stereo, XR, ZHD48, and ZHD96 modes
- 10 or 50 mW output
- Up to 7 hours on one NP-50 Pro battery
- 62 g (2.2 oz) with battery
Specifications
| Transmitter | |
|---|---|
| RF Modulation | Proprietary digital |
| ZMT4.5 Frequency Range | 512 – 608 MHz |
| ZMT4.6 Frequency Range | 578 – 698 MHz |
| RF Frequency Step | 100 kHz |
| RF Bandwidth | ZHD96 100 kHz; XR 200 kHz |
| Channel Separation | ZHD96 as close as 200 kHz; XR 400 kHz |
| Antenna Connector | SSMA female, 50 Ω |
| Emission Designator | 180KV2E, 100KV2E |
| FCC | Part 74.861 |
| Power Output | 10 or 50 mW, software selectable |
| Audio | |
| Dynamic Range | 136 dB |
| Distortion | 0.01% |
| High-Pass Filter | Off or 70 – 220 Hz, in steps |
| Mic Connector | 3-pin micro LEMO, balanced (3-wire) or unbalanced (2-wire) |
| Unbalanced Mic Power | 5.0 V, 10 mA max |
| Balanced Mic Power | 12 V at 25 mA; 24, 36, or 45 V at 10 mA max |
| Input Range | −60 to −30 dBu |
| Mic Impedance | 3.4 kΩ (680 Ω in 12 V mode) |
| A/D Conversion | 32-bit, 32 kHz |
| Timecode and Recording | |
| Clock Accuracy | 1.54 PPM (1 frame in 6 hours) |
| Timecode Type | SMPTE |
| Frame Rates | 23.98, 24, 25, 29.97 NDF, 29.97 DF, 30 NDF, 30 DF |
| Media | microSD card |
| File Format | .ZAX, converts to BWAV or MP3 |
| ZaxNet Receiver | |
| RF Frequency Range | 2.403 – 2.475 GHz |
| RF Modulation | Digital spread spectrum |
| RF Frequency Step | 1 MHz |
| RF Bandwidth | 1 MHz |
| Channel Separation | 2 MHz |
| Sensitivity | −96 dBm |
| Physical and Power | |
| Dimensions | 55.8 × 40.6 × 14 mm (2.2 × 1.6 × 0.55 in), H x W x D |
| Weight | 62 g (2.2 oz) with battery |
| Display | Graphic OLED |
| Battery | NP-50 |
| Power Consumption | 125 mA at 4.2 V, 50 mW, without ZaxNet or phantom power |
| Battery Life | Up to 7 hours with a lavalier; up to 6 hours with phantom power |
| Latest Specifications | Specifications are subject to change without prior notice. For current information, visit zaxcom.com. |
