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Lectrosonics HMa Plug-On Wireless Transmitter 470 to 537 MHz

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  • Accepts audio from any microphone or audio source with an XLR connector
  • Selectable 5, 15, 48 volt phantom power
  • 76 MHz tuning range in 100 kHz or 25 kHz steps for up to 3072 frequencies
    (941 band offers 695 frequencies over 19 MHz tuning range with 25 kHz steps)
  • Selectable 50/100 mW output power
  • Adjustable low frequency roll-off
  • Powered by two AA batteries
  • USB port for firmware updates
  • IR (infrared) port for fast setup
  • Solid machined aluminum housing

This unique Lectrosonics HMa Plug-On Wireless Transmitter (A1: 470 to 537 MHz) design will ideally match any microphone or line level source via a standard XLR connector. Phantom power is selectable at 5, 15 and 48 volts, or can be turned off for use with dynamic microphones and line level signal sources. The design of the Plug-On Wireless Transmitter includes a wide tuning range of up to 76 MHz, with tuning steps in increments of 100 kHz or 25 kHz, (19 MHz for block 941 version, for 695 frequencies). Along with providing peerless audio quality with wide frequency response and dynamic range in Nu Hybrid mode, the technology used in the HMa includes compatibility modes for Lectrosonics Mode 3 and IFB receivers by the HMa Lectrosonics Transmitter.

In the Box
  • Lectrosonics HMa Plug-On Wireless Transmitter (A1: 470 to 537 MHz)
  • Lectronics PHTRAN3 Leather Pouch
  • 2 x AA Alkaline Batteries
  • Limited 1-Year Warranty
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More Information
Product ConditonNew


Wireless Technology Analog/Digital Hybrid UHF
RF Frequency Band A1:
470 to 537 MHz
RF Bandwidth 67 MHz
Frequency Step Size 25 kHz (Minimum)
100 kHz
RF Channel Scanning Auto-Scan
Built-In Recorder No
Timecode Support No
Control App Support Yes, Available for Android/iOS
Modulation FM
SNR 103.5 dB
THD 0.2 %


Transmitter Type Plug-On
RF Output Power 50 / 100 mW (Switchable)
Audio I/O 1 x XLR 3-Pin Female Balanced Input (Lockable)
Included Cable Connector None
Phantom Power +5 V
+15 V
+48 V
Muting None
Auto-Level Control Yes
Gain Range 55 dB
Signal Processing High-Pass Filter:
-3 dB at 30 Hz
Frequency Response 35 Hz to 20 kHz
Sync Method IR
Antenna 1 x Internal
Power Requirements Battery
Battery Type 2 x AA (Included)
Approx. Battery Life 5 Hours
Display & Indicators 1 x Backlit LCD (Multifunction)
1 x LED (Power)
2 x LED (Audio Level)
Housing Aluminum
Dimensions 4.2 x 1.6 x 1.3" / 106.7 x 40.6 x 33 mm
Weight 6.7 oz / 190 g (without Batteries)

Packaging Info

Package Weight 1.15 lb
Box Dimensions (LxWxH) 9.8 x 7.8 x 3"
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to
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