Video Conference | AV Accessories | WM704HH
WM704HH - 4-Channel UHF Wireless Handheld Microphone System
Wireless Microphone System
WM704HH
Four-channel UHF wireless conference microphone system pairing a 1U metal-chassis receiver with dynamic handheld transmitters — 20 preset frequency groups, infrared one-key pairing and 60-metre working distance.
Product Description
The WM704HH is a four-channel UHF wireless conference microphone system. The receiver spans 530–670MHz with 30MHz bandwidth, FM modulation and PLL oscillation, delivering better than 105dB signal-to-noise, under 0.7% THD at 1KHz and 20Hz–20KHz ±3dB response.
Twenty preset frequency groups with automatic selective receiving keep the link clean, and one key changes the frequency group on all four channels. Four infrared SYNC buttons pair each microphone, while a light-ring shuttle knob and 256 × 64 COG display show volume, frequency and AF/RF strength.
Four BNC antenna inputs accept extended anti-interference antennas that bypass metal-cabinet shielding, giving 60 metres of visible working distance. The 1U metal chassis carries four balanced XLR outputs and one unbalanced 6.35mm output, and the handheld transmitters run 8–10 hours per charge.
Key Features
Four-Channel Receiver
A single 1U receiver runs up to four wireless microphones on independent channels.
20 Preset Frequency Groups
PLL circuitry with automatic selective receiving holds a clean, stable link.
Infrared Automatic Sync
Four independent SYNC buttons pair each microphone with a single press.
Shuttle Knob & HD Display
Light-ring knob and 256 × 64 COG display show volume, frequency and AF/RF level.
Electronic Volume Control
0dB to 20dB of gain per channel from the front-panel knob.
Flexible Antenna System
Four BNC antennas as standard, with extended antennas for larger venues.
Anti-Interference Circuitry
Keeps mobile-phone and electronic noise out of the audio path.
Dynamic Handheld Microphone
Dynamic coil capsule voiced for high-fidelity speech.
All-Day Battery Life
8 hours of continuous speaking and 12 hours of standby.
Ideal For
Conference Rooms
Up to four wireless microphones per receiver
Boardrooms
Cable-free discussion for chair and members
Auditoriums & Venues
Antenna distribution for full venue coverage
Rack-Mounted AV
1U metal chassis for standard equipment racks
Technical Specifications
| System & RF | |
|---|---|
| Configuration | 4-channel receiver + handheld mics |
| Carrier Frequency Band | UHF 530–670MHz (customizable) |
| Frequency Band Width | 30MHz |
| Preset Frequency Groups | 20 sets |
| Oscillation / Modulation | PLL / FM |
| Max Deviation | ±45KHz |
| Receiver | |
| Receiving Mode | Automatic selective signal receiving |
| Display | HD 256 × 64 COG |
| Volume Control | Electronic, 0 – 20dB per channel |
| Frequency Pairing | Infrared auto sync, 4 × SYNC keys |
| Sensitivity | S/N > 60dB @ 25KHz, 6dBv |
| S/N Ratio | > 105dB |
| T.H.D. | < 0.7% @ 1KHz |
| Frequency Response | 20Hz – 20KHz ±3dB |
| Audio Output | Balanced XLR × 4, Unbalanced 6.35mm × 1 |
| Antenna Input | BNC × 4 |
| Power Supply | DC 12V, < 7.2W |
| Size / Weight | 483 × 235 × 45.3 mm, 3.1 kg |
| Handheld Transmitter | |
| Capsule | Dynamic coil |
| Display | High-brightness LCD |
| Working Voltage | DC 3.7V – 4.5V |
| RF Power | 15mW |
| Consumption | Standby ≤ 350mW, Speaking ≤ 620mW |
| Operating Time | 8 – 10 hours |
| Operating Temperature | -9°C – 40°C |
| Size / Weight | Length 263mm, Max Ø 51mm, 0.35 kg |
| Working Distance | 60m (visible distance) |
