DIGI-SYS HPDA-8D is a 1U rack-mount unit, which accepts AES/EBU, SPDIF & Analogue input both
balanced and unbalanced with inbuilt selection. It simultaneously produces a stereo and mono balanced
output from the selected input signal.
DIGI-SYS HPDA-8D accepts 4 balanced AES/EBU signals and 4 SPDIF unbalanced signals in addition to
stereo balanced input, with Sample Rate Frequency range from 16 KHz to 192 KHz. This unit has Superior
performance with excellent signal to noise ratio and low distortion. It has built in provision for detecting
coding errors in the incoming Digital signals. Up to 8 front panel mounted professional TRS jacks can drive all
types of stereo headphone with individual volume controls. Outputs from selected input are always available
in both Analogue and Digital form through Balanced XLR and unbalanced BNC connectors.
Stereo analogue inputs have fine ±20dB pre-set analog level controls and additional digital control of ±20dBu
through interactive controls. The Interactive controls provide superb flexibility in selecting Stereo or mono
Analogue inputs without cluttering the front panel. This unit can also work as AD converter when analog
input is selected. Outputs are always available in Analog, digital Balanced and unbalanced form. The output
bit depth can be selected from 16 or 24 bits. The large dynamic range is optimized by microcontroller with
full scale resolution as per user requirements.
DIGI-SYS HPDA-8D has excellent overall frequency response and very low distortion, which has been
achieved by selectively mixing integrated circuits and discrete devices. Extremely low internal noise levels
achieved, also allow perfect recovery from week digital signals in the range of 100 mV.
Unique user interface through a graphical LCD and navigation controls provide unlimited configurations and
fine level controls. The LCD display in conjunction with built in error analysis provide all critical parameter
display. The unit is housed in a 19” rack mount chassis with power connections as per IEC recommendation.

·         Analog + AES/EBU +SPDIF inputs

·         Adjustable Analog Gain ±20 dB

·         24 bit capability

·         Digital Gain control ±20 dB

·         Selectable Sample Rate up to 96K

·         Short Circuit Protected.

·         Ultra Low Noise DAC.

·         Excellent Frequency Response.

·         Extremely Low Distortion.

·         Stabilized Power Supply.

·         LCD display

·         Digital signal analysis capabilities

·         High signal isolation (transformers)

·         Bar graph display analog levels

·          Interactive controls

Digital Input

Digital input    

4x AES/EBU XLR F 3 pin, 4x S/PDIF BNC

Digital input sample rate

16 KHz to 216 KHz auto detect and displayed

Input lock range

±2% of standard sample rates.

Digital input signal resolution

16-24 bit

Digital input amplitude

200 mV min. (90 mV typical), 5 V PP max.

Digital input Impedance

110Ω balanced, 75Ω unbalanced

Analog Input

Analog input

2x XLR F (balanced),

Input level

0dBu nom. +20dBu max.

Input impedance

>10kΩ balanced

Gain range

±20 dB analog,  ±20 dB digital

Analog Output

Analogue output

8x Head Phone Jack, 3x XLR M 3 pin (balanced)

Max output level

 24dBu active balanced

Output impedance XLR out

<50Ω ( min load 600Ω)

Head phone Impedance

32 Ω or higher

Frequency Response

±0.25dB (20Hz to 20KHz)

Signal to noise ratio

105 dB ( 0dBFS)

Channel matching

±0.25dB (20Hz to 20KHz)

Dynamic range


Digital Output

Digital output


Digital Output Impedance

110W Bal transformer isolated, 75W Unbalanced active

Sampling Frequency (ADC)

44.1KHz, 48KHz, 88.2KHz and 96KHz

Sampling Resolution

16 or 24 Bits





230 V ±10%, 50 Hz,  20VAMax

110 /230 V  ±10%, 50/60Hz  20VA Max (optional)

Size – HxWxD

44.5mm x 483mm x 203mm(1.75″X19″X8″)          

Standard 19″ rack mount.