Model: DSP-500A
First, functional characteristics
1. Integrated design of audio processor and digital power amplifier of host equipment, height 1U, CPU + multi-DSP embedded digital micro signal processor integration, using adaptive environmental acoustic noise suppression algorithm (AFC), noise (ANS), built-in 24Bit A/D, D/A conversion; 32-bit DSP processor, 96KHz high-speed sampling, using high-speed floating-point arithmetic. It can be wall-mounted or installed in a cabinet.
2. The host device has 4 audio inputs and 2 audio outputs. When the music is turned on, the microphone will be automatically turned off. 3rd microphone priority function. The mute interface of a separate microphone can be controlled by an external switch, and a constant voltage broadcast signal input has a priority playback function of a constant voltage broadcast signal;
3. The host device has 6 microphone inputs, one of which can be connected to the microphone. Each with 48V phantom power
4. The host device supports an external host controller, which can control the whole wheat mute, men's mode, women's mode, volume plus or minus 3dB, and restore to the original settings.
5. Pure digital adjustment, convenient and accurate adjustment; With automatic memory storage function, after the functions and parameters are set, each time the machine is turned on and on, it will automatically return to the original setting, and there is a lock function to prevent non-administrator misoperation.
6. The host is powered by a wide voltage switching power supply, and the AC180V-240V wide voltage range works, in order to ensure the normal use of the humidity area, the internal circuit board is required to adopt moisture-proof technology.
7. The host adopts Class D digital power amplifier to ensure the fidelity of the sound, with delay protection, midpoint voltage protection, short-circuit and over-current protection functions, and a cooling fan. The output power of the power amplifier is 2*150W, and one host can bring up to 2 pairs of speakers
8. The host has a built-in digital wireless receiving function, which can be used independently. The multi-functional wireless microphone has the functions of laser pointer, wireless PPT page turning, and wireless microphone; The wireless microphone uses UHF transmission technology. (This optional feature)
8. The software supports centralized remote management of LAN, viewing the online situation of equipment, etc.; Volume can be managed remotely or muted. (Need to configure another network module, the actual project needs to be selected)
9. It has the function of spatial de-reverberation algorithm, the sound reinforcement is clear and loud in the classroom with reverberation, no metal tail, the echo and reverberation time is ≤1 second, no word loss, no word jamming, and the sound reinforcement will not amplify the reverberation in the reverberation environment, and has the function of suppressing and eliminating reverberation. It has the function of effectively filtering the noise and noise interference caused by the air conditioner, electric fan, and students whispering in the classroom, and the noise is not affected by the pickup and amplification effect; Debugging-free, built-in digital microprocessor chip, ready-to-use, efficient and convenient
10. Automatic gain function: the sound reinforcement gain difference < 3.5dB and the signal-to-noise ratio ≥95dB in the range of 2-9 meters.
11. The output power is 4*150W.
12. Frequency response: 30Hz-18kHz (±1.5dB), total harmonic distortion: ≤0.2% (1kHz).
13. Feedback Suppression (AFC): Sound transmission gain increase: ≥15dB.
14. Adaptive Background Noise Reduction (ANS): The signal-to-noise ratio is increased by ≥20dB.
15. Automatic Gain Control (AGC): Gain Control Amplitude: -12dB - +12dB.
16. Echo cancellation intensity (AEC): ≥-60dB, echo cancellation tail length: ≥256ms.
17. Remote input and output interfaces for recording and broadcasting teaching
18. Support HDM high-definition video input and output (optional).
