Product Type
Dual-channel true diversity wireless microphone
Product Overview
The Harmonai ACT-620 is a professional-grade dual-channel true diversity wireless microphone system, operating in the UHF 600–700 MHz band. Both transmitters deliver stable transmission of over 500 meters in open space. Equipped with microcomputer CPU control and PLL phase-locked loop frequency synthesis, it supports infrared auto-synchronization and offers 64 freely selectable channels—effectively eliminating dropouts and channel interference. The receiver features a true diversity reception architecture, combined with dual noise squelch control (noise-lock squelch + tone-code navigation squelch), ensuring clean, stable audio output in any environment.
Operating Frequency Band (Transmitter)
600–700 MHz
Operating Frequency Band (Receiver)
600–690 MHz
Effective Range
Over 200 meters; up to over 500 meters in open space
Frequency Control Technology
PLL phase-locked loop frequency synthesis with microcomputer CPU control
Sync Method
Infrared auto-synchronization
Number of Channels
Transmitter: 32 / 64 / 99 channels freely selectable; Receiver: 32 / 64 channels
Display
LCD digital display
Frequency Stability
±0.002%
Max FM Deviation
±45 kHz
Squelch Control
Noise-lock squelch + tone-code navigation squelch (dual squelch)
Audio Circuitry
Intelligent dynamic audio compression and automatic level control (transmitter) / Audio dynamic expansion and automatic level control (receiver)
Reception Method
True diversity reception
Power Supply
Transmitter: 2 x AA batteries
Battery Life
Approx. 8 hours (continuous use)
Smart Features
Low-battery voltage warning display
Recommended Applications
The ACT-620 dual-channel true diversity wireless microphone is ideal for professional applications requiring independent dual-channel pickup—including KTV entertainment, conference speaking, live stage performances, wedding hosting, and training & education. With true diversity reception and transmission range exceeding 500 meters, it ensures robust signal coverage across large venues and outdoor locations—making it a dependable choice for event production and professional performances.
For detailed product information, bulk purchasing, or technical support, contact us today for a customized professional solution.
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