Harmonai ACT-550 Dual-Channel True Diversity Wireless Microphone System image 1

Harmonai ACT-550 Dual-Channel True Diversity Wireless Mic — 500m UHF Range

The Harmonai ACT-550 is a professional dual-channel true diversity wireless microphone system operating in the UHF 610–690 MHz band with up to 500 meters of line-of-sight transmiss...

$131.91

Model: ACT-550
Category: Microphones
Images: 4 images
Status: ready

Product Brief

Harmonai ACT-550 Dual-Channel True Diversity Wireless Mic — 500m UHF Range

Overview

The Harmonai ACT-550 is a professional dual-channel true diversity wireless microphone system operating in the UHF 610–690 MHz band with up to 500 meters of line-of-sight transmiss...

Price: $131.91
Model: ACT-550
Category: Microphones

Specifications

Parameter	Value
Operating Frequency Band	UHF 610–690 MHz
Effective Transmission Distance	500 meters line-of-sight (unobstructed)
Transmission Method	Digital FM modulation
Pilot Tone Method	Digital pilot tone (2048-bit symmetric encryption)
Anti-Interference Technology	Digital ID pilot tone technology
Maximum Number of Channels	520 selectable frequency points
System Compatibility	Up to 12 systems operating simultaneously
Reception Method	Diversity reception
Receiver Sensitivity	−105 dBm
Frequency Response	80 Hz–15 kHz (±3 dB)
Dynamic Range	>110 dB
Total Harmonic Distortion (THD)	<0.5%
Signal-to-Noise Ratio (SNR)	>105 dB (A-weighted)
Image Rejection	>75 dB
Adjacent-Channel Interference Rejection	>60 dB
Main Unit Operating Voltage	DC 12 V
Main Unit Power Consumption	12 W (operating current: 1000 mA)
Display	Dual LCD
Output Connectors	XLR ×2 / 6.35 mm ×1
XLR Output Level	+10 dBV
6.35 mm Output Level	+8 dBV
Output Impedance	3 kΩ (XLR/6.35 mm)
Operating Temperature	−15°C to 50°C
Microphone Cartridge Type	Dynamic (capacitive cartridge optional)

Service Support

We support project consultation, model recommendation, bulk purchasing and catalog delivery for retail, multipurpose halls, conference rooms and live events.

Business hours: Monday to Friday 09:00 - 18:30
Inquiry channels: phone / email / website form
Tip: share budget, quantity and use scenario in advance

Harmonai ACT-550 dual-channel true diversity wireless microphone product image

Product Overview

The Harmonai ACT-550 is a professional-grade dual-channel true diversity wireless microphone system, engineered with a high-frequency UHF 610–690 MHz band and delivering an effective transmission range of up to 500 meters. Equipped with advanced 2048-bit symmetric encryption digital pilot tone technology, it eliminates cross-talk and signal interception at the source. The receiver features a dual LCD display showing real-time signal strength and battery level, and supports up to 12 systems operating simultaneously without interference — making it an ideal solution for live stage performances, conference presentations, multi-purpose halls, and other professional audio environments.

Operating Frequency Band

UHF 610–690 MHz

Effective Transmission Distance

500 meters line-of-sight (unobstructed)

Transmission Method

Digital FM modulation

Pilot Tone Method

Digital pilot tone (2048-bit symmetric encryption)

Maximum Number of Channels

520 selectable frequency points

System Compatibility

Up to 12 systems operating simultaneously

Receiver Sensitivity

−105 dBm (diversity reception)

Frequency Response

80 Hz–15 kHz (±3 dB)

Dynamic Range

>110 dB

Total Harmonic Distortion (THD)

<0.5%

Signal-to-Noise Ratio (SNR)

>105 dB (A-weighted)

Output Connectors

XLR ×2 / 6.35 mm ×1

Main Unit Power Supply

DC 12 V / 1 A (power consumption: 12 W)

Microphone Cartridge Type

Dynamic (capacitive cartridge optional, requires 9 V power)

Pickup Pattern

Cardioid

Transmitter Output Power

110 mW (>20 dBm)

Transmitter Power Supply

2 × AA batteries (1.5 V each; runtime >5 hours)

Recommended Applications

Thanks to its 500-meter ultra-long-range transmission and diversity reception technology, the Harmonai ACT-550 wireless microphone system is widely used in:Large-scale stage performances — stable long-distance transmission with zero dropouts;Conferences and presentations — multi-channel management enabling up to 12 concurrent systems;Multi-purpose and banquet halls — feedback suppression ensures clear, pristine sound;Outdoor events — strong UHF-band interference resistance for complex environments;Educational and training settings — intuitive operation with one-touch auto-scan for rapid setup.

Explore more Harmonai professional audio solutions — contact us for full product documentation and technical support.