4-Port Digital Audio Switch with Analog Converter



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The SMA-AD400 enables users to convert four digital audio signals to an analog stereo RCA and 3.5mm output, along with anSPDIF digital output. Today's video and audio devices - including Blu-ray players, gaming consoles and others - often come with digitalaudio outputs. However, not all stereos, home theatres and PA systems are equipped for digital audio. The SMA-AD400 is an inexpensive and compact converter that makes digital audio signals compatible with the most common analog audio connectors, RCA and 3.5mm.With four inputs, two outputs and a button for switching, this unit delivers lots of flexibility. The device is plug-and-play ready andsmall enough to fit nearly anywhere.


  • Two Toslink digital audio inputs and two Coaxial digital audio inputs
  • One Toslink digital audio output, one RCA stereo output and one 3.5mm headphone output
  • Supports 192KHZ/24bit DAC
  • Supports Dolby AC3, DTS, THX, HDCD and LPCM for SPDIF output
  • Automatic identification of input signal format
  • Input status indication for easy trouble shooting


  • Home Theatre
  • Control Rooms
  • Production Studios
  • PA Systems
  • A/V Presentations
  • Meeting Rooms

SMA-AD400 BackView


SMA-AD400 Diagram




Analog Audio Output Support audio format PCM/LPCM
DAC sample frequency range 32~192 KHz
DAC Bit rate range 16~24 Bit
Digital input level 0.1~1Volts p-p
L/R output level(1kHz@0dB) 1V RMS
Headphone output power (1kHz@0dB RL=32) 30mW
SNR @ 0dB(CCIR/ARM) 90dB
Distortion 0.1%
Frequency response 20Hz~20KHz
Max working current 100mA
Power adapter format Input AC 100V~240V 50HZ/60Hz, DC5V/1A
Operating Temperature range -10 to +55℃
Storage Temperature range -20 to +60℃
Operating Humidity range 10 to 90%RH (No Condensation))
Storage Humidity range 5 to 95%RH (No Condensation)
Case Dimension (L x W x H) 3.3" x 2.4" x 0.8"
Weight 0.28 lbs
UPC / EAN Barcode icon
UPC 813280023191
EAN 0813280023191