Zaxcom TRXLA5


The TRXLA5 is a wide-band bodypack transmitter that runs on two AA batteries. It’s lightweight and durable, housed in a high-strength, impact-resistant nylon polymer casing. This transmitter design has remained popular because of the convenience of AA batteries and the 100 mW power output. This new model takes advantage of Blocks 20 – 26, where legal, and supports 5 Volt microphones.

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The TRXLA5 has a 3-pin micro LEMO connector that supports 5-volt lavalier microphones


The TRXLA5 transmits using 100% digital modulation allowing audio to be fully encrypted. Digital encryption is the only way to keep all audio transmission private. A digital transmission also provides audio quality superior to analog systems.


NeverClip™ is available in all modes on the TRXLA5. It works by utilizing two A-D converters to extend the dynamic range of the transmitter to 126 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). MARF ensures file corruption never happens if a battery dies or someone accidentaly removes a card too early.


LA5 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 the record, playback, and stop modes – all without ever needing to disturb talent.

The units can also replay audio via a timecode reference, giving production sound mixers the ability to replay and remix audio, creating a virtual multi-track playback and re-record system


The LA5 also sends a Quality Control audio signal over ZaxNet™ so when micing someone you don’t have to go to the cart to hear how it sounds. You can use an ERX to listen to the mic right on the spot.


To extend battery life, PowerRoll™ adjusts the LA5’s power level to 100mW 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 25mW.


The 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 LA5 runs for over 10 hours on two Lithium AA batteries. Run times on Alkaline and NiMH with vary based on what you’re using.


In the United States, the LA5 runs in the frequencies and power outputs as follows:
512.0 to 607.9 (up to 100mW)
614.1 to 615.9 (20mW)
653.1 to 662.9 (20mW)

Globally, the LA5 runs between 512.0 – 698.0 MHz

Zaxcom Digital Recording Wireless Transmitters are protected under patent #’s: 7,711,443 & 7,929,902


  • Transmitter
    • RF ModulationProprietary Digital Method
    • TRXLA5 US RF Freq Ranges512.0 to 607.9 MHz
    • 614.1 to 615.9 MHz
    • 653.1 to 662.9 MHz
    • Global RF Freq Range512 to 698 MHz
    • RF Frequency Step100 KHz
    • RF Bandwidth in ZHD Mode50 KHz
    • RF Bandwidth in XR Mode200 KHz
    • Channel Separation in ZHD ModeAs close as 100 KHz (receiver dependent)
    • Channel Separation in XR Mode400 KHz
    • Antenna Connector50 Ω SSMA Female
    • Emission Designator180 KV2E, 100 KV2E, 50 KV2E
    • FCC Part74.861
  • Transmitter Audio
    • Dynamic Range126 dB
    • Distortion0.002%
    • Frequency ResponseMode 0
    • High Pass FilterOff or 30 to 220 Hz, Steps
    • Mic Power5 VDC
    • Mic Connector3-Pin Micro LEMO
    • Input Range-60 to -30 dBu
    • Mic Impedance6.8 k Ω
    • ADC Bit-Depth24 Bits
    • ADC Sampling-Rate48 kHz
  • Timecode Reader / Generator
    • Clock Accuracy1.54 PPM (1 Frame Out in 6 Hours)
    • Timecode TypeSMPTE
    • Timecode Frame-Rates23.98, 24, 25, 29.97NDF, 29.97DF, 30NDF, 30DF
  • Internal Recording
    • MediaMicroSD Card (Flash Memory)
    • File Format.ZAX
    • Recording Time
  • 2.4 GHz ZaxNet Receiver
    • RF Frequency Range2.403 to 2.475 GHz
    • RF ModulationDigital Spread Spectrum
    • RF Frequency Step0.001 GHz (1 MHz)
    • RF Bandwidth1 MHz
    • Channel Separation2 MHz
    • Sensitivity-96 dBm
  • Physical
    • Weight3.2 oz without Battery
    • Dimensions (H x W x D)3.0″ x 2.4″ x .65″
    • DisplayGraphic OLED
  • Power
    • Power Output10 / 20 / 100 mW – Software Selectable (varies by regulation)
    • Battery LifeUp to 10+ Hours with 2 Lithium AA at 100mW