Harmonai UM-640 Professional UHF 4-Channel Wireless Microphone System

The Harmonai UM-640 is a professional UHF wireless microphone system operating in the 600–700 MHz band with 320 selectable frequencies (4×80). Featuring quad-antenna reception, it...

$206.28

Model: UM-640
Category: Microphones
Images: 4 images
Status: ready

Product Brief

Harmonai UM-640 Professional UHF 4-Channel Wireless Microphone System

Overview

The Harmonai UM-640 is a professional UHF wireless microphone system operating in the 600–700 MHz band with 320 selectable frequencies (4×80). Featuring quad-antenna reception, it...

Price: $206.28
Model: UM-640
Category: Microphones

Specifications

Parameter	Value
Channels	80×4 = 320 frequencies
Frequency Range	UHF 600–700 MHz
Frequency Response	30 Hz–18 kHz ±0.5 dB
Transmitter Sensitivity	100 dB
THD (Total Harmonic Distortion)	< 0.5%
Signal-to-Noise Ratio (SNR)	> 90 dB
Effective Operating Distance	100 meters (open environment)
Transmitter Output Power	5–30 mW
Transmitter Oscillation Mode	PLL phase-locked loop
Modulation Method	FM
Image Rejection	> 50 dB
Frequency Deviation	≤ 75 kHz
Transmitter Power Supply	DC 1.5 V × 2 (AA batteries)
Receiver Sensitivity	2.0 μV
Receiver Oscillation Mode	PLL phase-locked loop
Receiver SNR	> 90 dB
Receiver Outputs	Balanced outputs × 4, unbalanced output × 1
Receiver Power Supply	AC 100–240 V / DC 12 V, 1000 mA

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

Product Overview

The Harmonai UM-640 is a professional-grade UHF 4-channel wireless microphone system operating in the 600–700 MHz band, offering 4×80 = 320 selectable frequencies. It features advanced PLL digital pilot tone technology and automatic frequency scanning to easily avoid co-channel interference. The quad-antenna high-performance receiver ensures stable signal transmission within 100 meters in open areas. Compatible with handheld, lavalier, headset, and conference microphones, and equipped with simple infrared sync pairing, the UM-640 is ideal for small, medium, and large stages, karaoke venues, outdoor performances, and home entertainment.

Number of Channels

80×4 = 320 frequencies

Frequency Range

UHF 600–700 MHz

Frequency Response

30 Hz – 18 kHz ±0.5 dB

Transmitter Sensitivity

100 dB

THD (Total Harmonic Distortion)

< 0.5%

Signal-to-Noise Ratio (SNR)

> 90 dB

Effective Operating Distance

100 meters (open environment)

Transmitter Output Power

5–30 mW

Oscillation Mode

PLL phase-locked loop

Modulation Method

Image Rejection

> 50 dB

Frequency Deviation

≤ 75 kHz

Transmitter Power Supply

DC 1.5 V × 2 (AA batteries)

Receiver Sensitivity

2.0 μV

Receiver Outputs

Balanced outputs × 4, unbalanced output × 1

Receiver Power Supply

AC 100–240 V / DC 12 V, 1000 mA

Recommended Applications

The Harmonai UM-640 is suitable for diverse professional and consumer audio applications: small, medium, and large stage performances; karaoke bars (KTV); outdoor cultural events; conference speaking; education and training; and home entertainment. Its independent 4-channel receiver design supports high-density usage scenarios such as multi-host presentations, choral singing, and band performances. With flexible compatibility across handheld, lavalier, headset, and conference microphones, one system covers multiple use cases.

For more information about the Harmonai UM-640—including pricing, technical specifications, and bulk procurement options—please contact us for expert consultation.