Four-channel wireless handheld lavalier microphone set BK8404TS
Key Word ：
Digital Public Broadcasting System
※Adopts high-performance dynamic expansion and long-distance true diversity circuits for long-distance signal reception;
※The main unit supports optional channel combinations of independent output control groups: Group 01-02, Group 02-04 and Group 04-08;
※The built-in video function display of the main unit defines H as panoramic position, P as preset position, and A as PTZ camera protocol control. It is equipped with RS-485 and RS-232 control serial ports to support video data control as well as connection of local and remote high-definition cameras, enabling automatic video tracking. It facilitates background processing via communication with the video central control system; multiple sets of stacked devices and microphones can work simultaneously without mutual frequency crosstalk. Featuring high security and confidentiality, anti-eavesdropping capability and resistance to electromagnetic interference from mobile phones; wireless transmission ensures zero loss of audio signals with high sound fidelity, high signal-to-noise ratio and zero audio latency.
No cumbersome cable laying is required; the system can be put into operation with simple wiring and power-on, and users can move freely within the signal coverage area.
This series is widely applicable to high-standard multi-functional lecture halls, various large, medium and small-scale performances, high-definition live recording and broadcasting, remote audio-video conferences, as well as government departments including public security, procuratorates and courts.
### Product Features
1. Four-channel independent signal selection system that minimizes frequency dropout.
2. Independent SC automatic frequency scanning function for each channel, which quickly scans and locks onto frequencies with the least interference in the operating environment.
3. Each channel features independent digital display for channel number and frequency for intuitive operation. Dual-color synchronous display: orange for standby status and white for activated connection status.
4. High-definition full-view LCD screen on the main unit delivers clear display content.
5. IR infrared frequency pairing technology between receivers and transmitters supports one-click synchronous code matching.
6. Professional performance-grade phase-locked circuit integrated with noise squelch control and digital pilot tone technology. When the transmitter is powered off, pilot tone control mutes AF signals to suppress background noise and synchronously mutes the corresponding receiver, effectively blocking interfering signals.
7. The high-definition screen displays real-time working status including RF and AF signal strength, battery level, frequency and frequency group/channel.
8. Each channel is configured with 50 frequency sets; four channels provide a total of 200 frequency groups, supporting simultaneous operation of more than 5 stacked devices on-site.
9. CPU bus control paired with digital LCD interface delivers smooth operation and excellent performance. Equipped with multi-channel noise monitoring circuits and a dedicated ID verification system for strong anti-interference performance.
9. Built-in acoustic feedback suppression function to effectively reduce howling caused by acoustic feedback.
10. The wireless system is engineered for fixed installation scenarios to deliver optimal reliability, sound quality and transmission stability.
11. Preset digital audio equalizer to simulate acoustic characteristics of various microphone heads.
12. Effective open-space transmission range: 100 meters; compatible with optional handheld, headset, lavalier and conference microphones.
### Cabinet Specifications
Standard: EIA 1U
Number of Channels: Four channels
Frequency Response: 55Hz～16kHz ± 3dB
Frequency Range: 615MHz-665MHz
Modulation Mode: FM
Total Channels: 200
Channel Spacing: 50kHz
Frequency Stability: ±0.005%
Dynamic Range: 100dB
Maximum Deviation: ±45kHz
Audio Frequency Response: 40Hz-18kHz (±2dB)
Overall Signal-to-Noise Ratio: >105dB
Total Harmonic Distortion: ≤0.5%
Operating Ambient Temperature: -10℃~+50℃
Effective Operating Distance: Over 150 meters in open areas
Oscillation Mode: PLL phase-locked frequency synthesis
Output Jacks: 1×6.35mm MIXOUT mixed output, 4×BALOUT independent balanced outputs
Input Voltage: DC12V—DC15V, 1000mA
Net Weight: 1.73KG
Dimensions: 480mm(W) × 44mm(H) × 190mm(D)
## Conference Transmitter
◆ Operating Frequency: 615-665MHz
◆ Modulation Mode: Wideband FM
◆ Total Channels: 50
◆ Channel Spacing: 300kHz
◆ Frequency Stability: ±0.005%
◆ Dynamic Range: 100dB
◆ Frequency Deviation: ±45kHz
◆ Audio Frequency Response: 60Hz-16kHz (±3dB)
◆ Overall Signal-to-Noise Ratio: ＞95dB
◆ Total Harmonic Distortion: ≤0.5%
◆ Operating Distance: 150 meters in open areas
◆ Operating Ambient Temperature: -10℃~+50℃
◆ Power Supply: 2 pieces of 1.5V AA alkaline batteries
◆ Built-in functions: battery level indicator, low-battery alarm and signal indicator.
◆ Battery Life: Over 8 hours under normal transmit power
Conference Unit Dimensions: 100mm*135mm*60mm
## Handheld Transmitter
◆ Operating Frequency: 615-665MHz
◆ Modulation Mode: Wideband FM
◆ Total Channels: 50
◆ Channel Spacing: 300kHz
◆ Frequency Stability: ±0.005%
◆ Dynamic Range: 100dB
◆ Frequency Deviation: ±45kHz
◆ Audio Frequency Response: 60Hz-16kHz (±3dB)
◆ Overall Signal-to-Noise Ratio: ＞95dB
◆ Total Harmonic Distortion: ≤0.5%
◆ Operating Distance: 150 meters in open areas
◆ Operating Ambient Temperature: -10℃~+50℃
◆ Power Supply: 2 pieces of 1.5V AA alkaline batteries
◆ Built-in functions: battery level indicator, low-battery alarm and signal indicator.
◆ Battery Life: Over 8 hours under normal transmit power
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WEISHITE Audio Technology (Guangzhou) Co., Ltd
Address: 5th Floor, No. 11, Area A5, Lixin Road, Huimei New Village, Xintang Town, Zengcheng District, Guangzhou City
E-mail ：caoyaoyu@gztsaudio.com
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