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JS-520 Digital Wireless Microphone Preamplifier
1U standard rack-mount multifunctional preamplifier integrates three core functions: preamplification, audio signal processing, and digital wireless microphone operation. Paired with a three-in-one wireless microphone system featuring microphone, laser pointer, and wireless PPT page-turning capabilities, it delivers integrated professional output for “audio capture + presentation + audio processing,” widely suitable for teaching, speeches, conferences, and other scenarios.
The wireless microphone employs a dual-mode design featuring IR infrared and UHF wireless transmission. With a 24K high sampling rate, proprietary RF technology, and digital encoding, it delivers low noise, no crosstalk, stable transmission, and extended range. Upon startup, it automatically detects the environment and selects the optimal operating channel. Seven levels of adjustable pairing power ensure outstanding interference resistance. Features an integrated pickup sensor + 3.5mm external mic jack supporting headset/lapel mic expansion. Five-band EQ tone adjustment, volume memory, one-touch mute, and limiter anti-feedback precisely adapt to diverse vocal needs. Pen-shaped ergonomic design ensures comfortable grip. OLED color display clearly shows parameters and supports logo customization. Type-C charging with 3.7V lithium battery delivers ≥12 hours of battery life. Auto-shuts down after 60 minutes of no signal for enhanced energy efficiency and environmental friendliness.
The amplifier unit features comprehensive connectivity: one stereo input, one wired microphone input with DC6V polarity power supply, two stereo line outputs, and a reserved feedback suppression module interface for diverse expansion needs. Supports independent tone and volume adjustment for wired/wireless microphones. The receiver includes a 6.35mm microphone output and miniUSB PPT interface for convenient operation. Its 1U standard rack-mount design facilitates installation, combining professional-grade performance with practicality to deliver stable, efficient audio solutions for diverse environments.
Key Features:
1. Professional all-in-one multifunctional preamplifier integrating preamp, audio signal processing, and digital wireless microphone functions;
2. Integrated design combining microphone, laser pointer, and wireless PPT page-turning functions. Supports IR infrared, UHF auto-pairing, and UHF wireless transmission with dual-mode seamless integration for crystal-clear audio;
3. Operates in the UHF band with a 24K sampling rate, meeting high-quality vocal transmission requirements. Dedicated RF technology and digital encoding ensure low noise, no crosstalk, stable communication, and extended transmission range;
4. Automatically detects the operating environment upon startup, selects the optimal working channel, and performs automatic frequency pairing. It searches for clear channels and pairs devices upon power-on. Seven levels of pairing power are adjustable in real-time, ensuring no frequency interference, strong anti-interference capability, and stable transmission;
5. Features a built-in microphone sensor and a 3.5mm external microphone jack, allowing connection of headset or lapel microphones or transmission of other audio files;
6. Adjustable microphone volume with memory function and one-touch mute capability;
7. Five-band EQ for vocal tone adjustment, limiter function to effectively suppress feedback;
8. Color OLED display clearly shows system status and parameters, supports customizable logo/brand display;
9. Type-C charging with built-in rechargeable high-performance 3.7V polymer lithium battery. Includes protection circuitry for safety and reliability, delivering ≥12 hours of continuous operation on a full charge;
10. Intelligent low-power design automatically powers off after 60 minutes of no signal input for energy efficiency and environmental protection;
11. Pen-shaped microphone body offers comfortable, ergonomic grip. Zone-separated buttons simplify operation. Lightweight and easy to hold.
12. Receiver features microphone volume control, 6.35mm microphone output jack, miniUSB PPT interface, 3.5mm external IR pairing port, and DC power input socket;
13. Includes one stereo audio input channel, one wired microphone input (with DC6V polarity power supply), and two stereo line outputs;
14. Reserved interface for feedback suppression module;
15. Independent adjustment for wired/wireless microphone tone and volume;
16. Professional all-in-one multifunctional preamplifier integrating preamp, audio signal processing, and digital wireless microphone functions;
17. 1U standard rack-mount design for easy installation.
Key Specifications:
Microphone
Modulation: FM
Pairing Method: DSP intelligent scanning, auto-matching or infrared frequency pairing
Operating Frequency: 1.2GHz
Voice Frequency Response: 100Hz–10kHz
Dynamic Range: 70dB
Distortion: ≤0.08%
Signal-to-Noise Ratio: ≥82dB
Full-Scale Input: 80mVrms
Full-Scale Output: 870mVrms
Data Rate: 2 Mbps
Transmit Power: >10 dBm
Maximum Operating Range: Indoor >30M
Power Consumption: 35mA
Weight: 40g
Microphone Accessories: Lanyard, USB charging cable, charger
Receiver
Modulation: FM
Pairing Method: DSP intelligent scanning, auto-matching or infrared frequency pairing
Operating Frequency: 1.2GHz
Voice Frequency Response: 100Hz–10kHz
Dynamic Range: 70dB
Distortion: ≤0.08%
Signal-to-noise ratio: ≥82dB
Data rate: 2 Mbps
Maximum operating distance: Indoor >30M
Antenna connection: External whip antenna
Frequency response: Line input 20Hz-20KHz Wired microphone: 50Hz-18KHz
Microphone Tone Control: Treble: 10kHz ±12dB, Bass: 100Hz ±12dB
Rated Input Level: Wired Microphone 15mV (Unbalanced), Line: 200mV
Rated Output Level: Line 0.775V
Distortion: ≤0.3%
Power supply: AC 220V ±10% / 50Hz
Dimensions: 230 × 480 × 50 (D × W × H, unit: mm)
Net weight: 2.3 kg
