Product Type
Quad true diversity wireless microphone system
Professional audio, microphones and system integration

The Harmonai ACT-434 is a professional-grade quad true diversity wireless microphone system, engineered for multi-speaker environments. It employs PLL phase-locked loop frequency synthesis technology and infrared synchronization, supporting up to four transmitters simultaneously. In open spaces, transmission range exceeds 500 meters, making it ideal for large-scale conferences, stage performances, and educational training.
The receiver features a true diversity architecture, combined with dual noise squelch control — noise-lock and tone-code navigation — ensuring stable, reliable signal reception and effectively suppressing dropouts and inter-channel interference. Each transmitter includes an LCD digital display, enabling seamless switching between 32/64/99 channels, with real-time operational status clearly visible. Intelligent low-battery warning prevents unexpected power loss during use.
Quad true diversity wireless microphone system
4 channels
Over 200 meters (up to 500+ meters in open space)
600–690 MHz (UHF)
PLL phase-locked loop frequency synthesis technology
Infrared synchronization
Transmitter: 32/64/99 channels; Receiver: 32/64 channels
LCD digital display
±0.002%
±45 kHz
Noise-lock squelch + tone-code navigation squelch
True diversity reception
2 x AA batteries
Approx. 8 hours
Harmonai
Ideal for large conferences, educational training, live performances, wedding hosting, and outdoor events — any scenario requiring multiple speakers. Four independent channels operate without interference, and true diversity reception guarantees signal stability, making it the optimal choice for professional sound reinforcement.
Learn more about Harmonai’s professional wireless microphone solutions — contact us for detailed pricing and technical support.