Functional characteristics
1. Integrated design by audio processor part digital power amplifier part and dual mode wireless microphone receiver, wireless external reception, height 1.5U, pure embedded design, front panel LCD display parameters. (Wireless microphone function optional)
2. Adopt adaptive environmental whistling suppression algorithm (AFC), feedback suppression (AFC) : sound transmission gain increase: ≥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, using high-speed floating point arithmetic.
3. System Intelligence (AGC) bidirectional level control technology can achieve clear, continuous output without significant fluctuation of voice level.
4.AR intelligent adjustment, no manual debugging
5. Built-in digital pressure limiter: can protect the sudden loud pressure damage horn.
6. Digital ambient noise: there are multiple threshold adjustments to remove unwanted background noise.
7. Built-in DSP processor, with high-pass, 10-segment digital equalization, accurate adjustment of sound field equalization compensation.
8. Input 5 microphones, and ensure sound restoration for the card faucet interface, with 48V power supply, with multi-wheat simultaneous use technology, and multi-wheat simultaneous use of no screaming, no word loss, no lag, even sound field.
9. Debugging control interface: support serial port and USB debugging; The panel can lock all parameters to prevent misoperation. The Settings can be adjusted through the PC interface and support central control. Total microphone volume adjustment (-80~0DB) Total music volume adjustment (-80~0DB) Lock panel save function,
10.5 microphone input (one of which is a wireless microphone function), independent adjustment sensitive modulation. The external mute switch panel can place the lectern, which is convenient for teachers to operate in class. It can adjust the volume of 0dB-70dB and has an indicator for decibel number display, and has a mute function, and does not affect the recording effect when muted. Each MIC independent 48V phantom power supply, can be switched independently. It is compatible with the gooseneck microphone and has an independent power switch to realize the free switching of the Gooseneck microphone.
11. The host adopts switching power supply, Class D digital power amplifier to ensure sound fidelity, with delay protection, midpoint voltage protection, short-circuit overcurrent protection functions, with cooling fan. The output power of the power amplifier is 4*150W, and a host can have up to 8 pairs of speakers
12. Audio input There are two sets of stereo input, recording audio output, stereo output. Music on automatically turns off the microphone. The fourth microphone priority function. Separate microphone mute interface can be controlled by external switch
Technical parameter
Microphone power supply: 48V phantom power
Microphone input level: -57dBu -- -12dBu
Microphone input: 3 channels, Canon connector
Audio input: RCA stereo input 2 sets
Recording output: RCA stereo output 2 sets
Control interface: RS-232 interface 1, USB interface 1
Power: 4X150W/ 8Ω, 200W/4Ω
Power amplifier input sensitivity: 0.775V
Frequency response: (through frequency response 30Hz to 20kHz. Feedback suppression frequency response 50Hz to 16KHz) +/- 1dB
Line: 20Hz~20KHz
SNR: ≥100Db(not counted)
Sound transmission gain: 8-12dB
Background noise reduction: Increase the system signal ratio ≥20dB
Automatic gain control range :-12dB +12dB
Power supply :AC185-235V50/60Hz
Volume (width X depth X height) :480*280*75MM
Gross weight :7.7KG
