A: functional feature
⊙. Integrated design of audio processor part digital power amplifier part and dual-mode wireless microphone receiver, wireless external receiving, height 1.5U, pure embedded design, front panel LCD display various parameters and indicators. (wireless microphone function optional)
⊙Adopt adaptive environmental whistling suppression algorithm (AFC), feedback suppression (AFC): sound transmission gain increase range: ≥12dB background noise (ANS). Signal-to-noise ratio can be improved by 18dB built-in 24Bit A/D, D/A conversion; 24-bit DSP processor, 48KHz high-speed sampling, high-speed floating-point operation.
⊙The system intelligence (AGC) two-way level control technology can obtain clear, continuous output without obvious fluctuation of voice level.
⊙Built-in digital compressor: It can protect the loudspeaker from being damaged by sudden loud pressure.
⊙Digital noise gate: Multi-level threshold adjustment can remove unwanted sound.
⊙Built-in DSP processor, with high and low pass, 10-band digital equalization, precise adjustment of sound field equalization compensation.
⊙ Input 5 microphones, and ensure the sound reproduction degree for the card tap interface, with 48V power supply, with the technology of using multiple microphones at the same time, and the simultaneous use of multiple microphones does not whistle, does not lose words, does not freeze, and the sound field is uniform.
⊙Debug control interface: support serial port and USB debugging; the panel can lock all parameters to prevent misoperation, you can adjust settings through the computer PC interface, support central control. Microphone total volume adjustment (-80~0DB) Music total volume adjustment (- 80~0DB) lock the panel save function, the PC interface can be friendly set to administrator mode and common user mode.
⊙5-way microphone input (one of which is wireless microphone function), independent adjustment and sensitive adjustment. External mute switch panel can be placed on the podium, which is convenient for teachers to operate in class. It can adjust the volume of 0dB-70dB and has an indicator light to display the decibel number. It also has a mute function, and the recording effect is not affected when muted. Each MIC is powered by an independent 48V phantom power supply, which can be switched on and off independently. Compatible with gooseneck microphones , and has an independent power switch, which can realize the free switch of gooseneck microphone.
⊙The host adopts pure copper toroidal transformer for power supply, class AB discrete component power amplifier to ensure sound fidelity, with delay protection, mid-point voltage protection, short-circuit overcurrent protection function, with cooling fan. The output power of the power amplifier is 4*150W , a host can bring up to 8 pairs of speakers
⊙Audio input has two sets of stereo input, recording audio output and stereo output. When the music is turned on, the hanging microphone is automatically turned off. The 4th channel microphone priority function. The single microphone mute interface can be controlled by an external switch
⊙The host can have built-in dual-mode digital wireless receiving function, laser pointer, PPT page turning, independent choice (this optional function)
B: Applicable places: conference rooms, courts, multimedia classrooms, etc.
C: technical parameters
|Microphone power supply
| 48V phantom power
|Microphone input level
|3 way, Canon connector
|RCA stereo input 2 groups
|2 groups of RCA stereo output
|1 RS-232 interface, 1 USB interface
|Amplifier input sensitivity
(Through frequency response 30Hz to 20kHz. Feedback suppression frequency response 50Hz~16KHz) +/- 1dB
Line:: 20Hz - 20KHz
|Sound transmission gain boost
|Background noise reduction
|Improve system signal ratio ≥ 20dB