Guangzhou DSPPA Audio Co., Ltd.
Tel: 020-28346138
Fax: 020-81305947

DP4004 4 in 4 out DSP Audio Processor


● With 4 analog balanced inputs and 4 analog balanced outputs, as well as a maximum input and output of 17dBu (5.48Vrms), undistorted.
● With 48V phantom power per input channel.
● With microphone amplifier per input channel, with gain adjustable from 0~40dB in 1dB steps.
● With stereo USB sound card function for playback and recording.
● With USB port for computer software control and USB sound card transfer function.
● With RS232 serial port for computer software control and central control function.
● With RS485 serial port for computer software control and central control function.
● With network interface for computer software control and central control function, managing multiple devices simultaneously through network connection.
● With 8 external GPIO ports.
● With an LCD screen, allowing you to configure a range of functions such as device name, device presets, device IP, input volume, output volume and input mode, and to check the device version.
● With a variety of DSP functions, such as AFC (Adaptive Feedback Cancellation), AEC (Acoustic Echo Cancellation), ANC (Active Noise Cancellation), AGC (Automatic Gain Control), AUTO MIX (Automatic Mixing), MATRIX MIX (Matrix Mixing), Noise Gate, PEQ (Parametric Equalizer), Delay, FIR Filter, High and Low Pass Crossover, Compressor, and Limiter.
● With 15-band PEQ for the input and 10-band PEQ for the output.
● With 2000ms delay per input channel and 2000ms delay per output channel.
● With 512 Tap FIR per output channel.
● With voice activation function (camera tracking) per input channel, support camera control with PELCO-D, PELCO-P, and VISCA protocols.
● With 60 preset memory points.
● Support control box control.
● Support Android APP network control.
● Support archive locking and setting parameters hiding to ensure the technical security of the project.

  • Introduction
  • Specification

This device is an 4-in 4-out automatic mixing media matrix with 4 analog inputs and 4 analog outputs, and a variety of DSP functions such as built-in feedback suppression, automatic mixing, matrix mixing, equalizer, crossover, compressor, AGC (Automatic Gain Control), AEC (Acoustic Echo Cancellation), and ANC (Active Noise Control). It is controlled by the software via USB drive-free connection to a computer, and connected to the central control via RS232, RS485, and TCP/IP for remote control, suitable for a variety of applications for sound reinforcement engineering.



DSP Chip

Signal Processing

32bit float point dsp 400Mhz

Audio System Delay

< 3ms

Digital-to-Analog Conversion


Sampling Rate


Analog Audio Input/Output

Input Channel

4 balanced inputs, Mic/line level

Audio Connector

3.81 mm Phoenix plug, 12-pin

Input Impedance


Maximum Input Level

17dBu (5.48Vrms)/Line; -3dBu (0.54Vrms)/Mic@20dB Gain

Phantom Power

+48VDC, 5.5mA per channel

Output Channel

4 balanced outputs, line level

Output Impedance


Audio Performance Specifications

Frequency Response

20Hz-20kHz (±0.5dB)/Line, input 0dBu (0.775Vrms)

20Hz-20kHz (±1.5dB)/Mic, 20dB gain, input

-10dBu (0.245Vrms)


-90dB (@17dBu, 1kHz, A-wt)/Line

-90dB (@-6dBu, 1kHz, A-wt)/Mic, 20dB gain

S/N Ratio

110dB (@17dBu, 1kHz, A-wt)/Line

100dB (@-6dBu, 1kHz, A-wt)/Mic, 20dB gain

Communication Ports and Indicators


Type-B 2.0, drive-free


Serial port communication

TCP/IP Network Port


Indicator Light

Link, +48V, input and output audio signals

Electrical and Physical Parameters

Power Supply

90V-264V AC 50-60 Hz

Operating Temperature


Dimensions (W*D*H)


Package Dimensions (W*D*H)


Overall Package Dimensions (W*D*H)


Net Weight


Gross Weight


Overall Gross Weight (5 Units)


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