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

D6641H/D6642H/D6643H/D6644H Digital Audio Processor


● 4/8/12/16 balanced audio input of phoenix jacks
● 4/8/12/16 balanced audio output of phoenix jacks
● 24bit/48kHz sampling, high efficiency A/D & D/A converter
● 1 USB interface for video recording and software upgrading
● Advanced audio processing of EQ, frequency filter, feedback, noise, echo, etc.
● 1 RJ-45 interface to link with computer for system set up
● 1 RS232 interface and 1 RS485 interface to third devices such as audiovisual matrix, camera, etc.
● 1 GPIO programable interface (8 groups), end user can define the functions accordingly
● With built-in PC software, no need to install or download from network
● 1 U slim design, suitable for 19" rack mounting

  • Introduction
  • Specification

The device maximally supports 16 input/output analog channels and 1 extended USB recording and broadcasting channel. It is equipped with high quality 21 level pre-amplifier circuit, DSP processing bus structure, and with multiple functions such as echo eliminator, noise eliminator to restore high quality sound. It’s mainly applied in a variety of large venues like theater, concert hall, remote video conferencing, sports venues, churches, conference centers, theme parks and so on. Its operation is simple and intelligent.

The maximum number of input


The maximum number of output


232 serial number


485 serial number


GPIO number

8,Freely configurable input and output

RJ45 number


USB number

1,Supports recording and broadcasting

The maximum analog gain


Phantom powered


Input and output


A/D Dynamic Range


Input common mode rejection

80 dB @ +24dBu  @60Hz

Input resistance

20kΩ balance,10kΩ unbalance

Maximum input


D/A Dynamic Range


Channel isolation


Frequency response

20~20kHz (±0.25dB)

Total harmonic distortion(THD+N)

≤0.002% @1kHz,+4dBu

Output impedance

100 Ω balance,50 unbalance

Maximum output


Working power supply

AC 90V~260V AC,50Hz /60Hz

Operating temperature


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  • Address:Jianggao Town, Baiyun District, Guangzhou, China