1. 4, 8, 12, 16 balanced microphones / line input, with Phoenix plug-in interface;
2. 4, 8 and 12 channels of balanced output, with Phoenix plug-in interface;
3. MP3 format playback is supported on the panel, and USB multimedia storage recording function can be extended;
4. Support multiple control methods such as PC, central control platform, key panel, touch panel, etc;
5. Built in signal generator, automatic mixing (AM), automatic gain control (AGC), feedback cancellation (AFC), echo cancellation (AEC) and other main algorithms;
6. Input each channel: pre amplification, signal generator, expander, compressor, 5-stage parameter equalization
7. Output each channel: 31 segments graphic equalization and 8 segments full parameter equalization switching selection, delayer, frequency divider and limiter
8. Built in graphic visual feedback inhibition function interface to make feedback inhibition more clear
9. Full function matrix mixing function, built-in patented component matrix adjustment function;
10. Built in automatic camera tracking function, easy to realize video conference; support scene preset function; power off automatic protection memory function
11. It has more than ten professional audio processing modules, such as: 5-segment full parameter equalizer, 8-segment graphic equalizer, high-precision compression and limiter, high sensitive expansion and automatic gain, frequency divider, automatic mixer, time delayer, matrix mixer, component matrix regulator, noise threshold, mute module, signal generator and signal indicator level meter.
12. Built in central control code generator, no need to apply formula to edit code;
13. The equipment provides general programmable I / O port, and sets fire linkage and other functions;
14. RS-485 bidirectional serial control interface; it can control other external equipment such as video matrix, camera and other RS-485 equipment, or receive the third-party RS-485 control.
15. Each input channel provides + 48V DC 7ma phantom power supply.
16. It can be connected with control equipment through USB, WiFi, TCP / IP interface.
17. GPIO control interface supporting 12 logic inputs and 4 voltage outputs.
18. The intuitive and concise graphical control software interface makes the operator's good experience get the ultimate amplification.

Model	DSP404	DSP404D	DSP808	DSP808D	DSP1212	DSP1212D	DSP1612	DSP1612D
Input interface(multi-channel Phoenix plug)	1x4 input interfaces in total		2x4 input interfaces in total		3 x 4 input interfaces in total		4x4 input interfaces in total
Output interface (multi-channel Phoenix plug)	1x4 output interfaces in total		2x4 output interfaces in total		A total of 3x4 output interfaces		A total of 3x4 output interfaces
DSP module	Single DSP module	Dual DSP module	Single DSP module	Dual DSP module	Single DSP module	Dual DSP module	Single DSP module	Dual DSP module
GPIO control interface	Support 12 logic inputs and 4 voltage output controls
Input impedance	Balance: 9.4k Ω. Non balance: 4.7K Ω
Output impedance	Balanced: 100 Ω, unbalanced: 50 Ω
Computer interface	RS485 interface (Phoenix plug), wired network interface (RJ-45)
Input common mode rejection ratio	≥78 dBu (1KHz)
Input to output dynamic range	112dBu
frequency response	20Hz~20kHz (-0.5dB)
Signal-to-noise ratio	>93dB@0dBu，1KHz
Harmonic distortion + noise	≤0.005% @1kHz，0dBu
Channel separation	>88dB(1KHz)
Input channel function
Mute / phase / phantom power / sensitivity	Each input channel has its own mute / phase / phantom power / sensitivity / 0dBU to - 42dbu
Test audio	Sine wave / pink noise / white noise
Expander	Threshold: - 56dbfs to 0dbfs, ratio: 1 to 20, start time: 1ms to 1000ms, recovery time: 1ms to 1000ms
Equalizer	Each input channel has an independent 5-segment all parameter equalizer; the center frequency point from 20Hz to 20kHz bandwidth: 0.02 to 4.00oct, bandwidth step: 0.01oct, gain: - 15dB to + 15dB, gain step: 0.01dB
compressor	Threshold: - 48dbfs to 0dbfs, ratio: 1 to 20, start time: 1ms to 1000ms, recovery time: 1ms to 1000ms
automatic gain	Threshold: - 60dbfs to 0dbfs, target threshold: threshold to 0dbfs, ratio 1 to 20, start time: 1ms to 1000ms, recovery time: 1ms to 1000ms
Auto mixing	Gain: - 72d to 12dB, ratio: 1 to 3, recovery time: 5ms to 5000ms
Feedback cancellation / echo cancellation	Adaptive feedback cancellation, adaptive echo cancellation
Mixer	Full function matrix mixing function, built-in patented component matrix adjustment function
Output channel function
output delay	Each output channel has independent delay (0ms to 2000ms or delay distance 0m to 680m)
Frequency divider	Each output can be independently set with high pass and low-pass filters (all parameters adjustable). Each filter has three different types and seven different slopes
Graphic equalization	31 segment graphic equalization and 8 segment all parameter switching options, bandwidth: narrowband / normal / broadband
Limiter	Threshold: - 56dbfs to 0dbfs, recovery time: 1ms to 1000ms
Mute / phase	Independent mute / phase control for each output channel
processor	48Khz sampling frequency, 24 bits of data
power	≤37.8W		≤37.8W		≤37.8W		≤37.8W
Power Supply	AC 190V/240V 50Hz/60Hz
Product size(WxDxH)	488X260X44mm
Net weight	4.3(kg)
Gross weight	1pc：5(kg)