Digital to Analog floating point room correction DSP with SPDIF/AES-EBU/Toslink interface. Boxed in sturdy aluminum enclosure.
349 USD
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  • Description
  • Specifications
  • Support
  • Application Notes
  • Reviews

Introducing the OpenDRC platform, a range of cost effective digital audio processor with floating point capabilities. Powered by Analog Devices Sharc processors, the OpenDRC engine handles complex audio filtering such as room correction, FIR crossover filtering, reverb engines...Thanks to the flexibility of the platform and its high performance, OpenDRC supports a wide variety of applications.

The OpenDRC-DA (Digital to Analog) carries the most common stereo digital audio formats (AES-EBU, SPDIF and Toslink) on the input side. With its on-board Asynchronous Sample Rate Converter (ASRC), digital audio is converted to the proper rate. On the output side, the praised ES9023 DAC from ESS Tech provides outstanding analog audio performance. The learning remote feature and/or rotary encoder will allow control of your source, active preset or master volume without the need of any PC once the unit is configured.



  • Room correction with FIR filtering
  • Convolution engine for advanced/Custom filters
  • 2 way advanced filter engine
  • System equalization

Product downloads

What's in the box?

  • 1 x OpenDRC-DA boxed in sturdy metal enclosure
  • 1 x USB cable Type B
  • 1 x Optical Toslink cable
  • 1 Universal 5VDC power supply with interchangeable plugs for UK/EU/US/AU

Optional Accessories

  • UMIK-1, unique calibration file mircophone for accurate acoustic measurements


Digital Signal Processor Engine Floating-point Analog Devices SHARC DSP

Internal Processing resolution
& Sample rate

32-bit - 48/96kHz depending on plugin

Input/Ouput Configuration

2 in / 2 out

Audio Input Connectivity

Stereo Digital Inputs: AES-EBU (XLR), SPDIF (RCA)
TOSLINK (optical)
Supported sample rate: 20~216Khz

Audio Output Connectivity

Balanced Analog Audio,  XLR connector

Input / Output Max Levels

IN: -
OUT: 2Vrms

Input Impendance
Output Impedance 1.12 kΩ (560 Ω each signal pin)
Calibration Software OpenDRC plug-in
Filtering Technology FIR + IIR
DSP Presets Up to 4 presets 
Dimensions 52 x 180 x 200mm
Power External 5V supply
Impulse Response Correction
Infrared Remote Learning
Win/Mac Compatible
UMIK-1 Included
Bass Management
Room EQ Wizard Support

Applications notes on OpenDRC Series

Introducing the world of Digital Room Correction (DRC), a process where digital filters are used to correct speaker + room aberrations. A 3 step process yet an acoustical challenge where DSP & Math Gurus use all resources to solve this complex problem. The following lines will summarize the basics of room correction in a setup involving a PC/Mac with a measurement/filter generation software, a measurement microphone and an audio processor (OpenDRC).

AcourateDRC is the next generation of AcouratePRO software from Dr Ulrich Brüggemann. Designed with simplicity in mind, AcourateDRC exports filters who can be directly imported in the OpenDRC. 

rePhase is a Windows-based freeware program written by Thomas (aka "pos"), a long time miniDSP community member. rePhase generates finite impulse response (FIR) filters that "reverse" the phase shifts introduced by a loudspeaker crossover. rePhase can also generate linear-phase crossovers. With the aid of a real-time FIR filtering engine or "convolver" such as miniDSP's OpenDRC or miniSHARC, the result is a linear-phase loudspeaker system.

This tutorial will provide a walk-through of filter creation using Filter Hose to linearize a loudspeaker frequency and phase response. Data will be exported to MiniDSP OpenDRC.



There are yet no reviews for this product.

It's an honour to see Pat Brown from Synaudcon ( using the OpenDRC + rephase + REW for a comprehensive review of the influence of FIR filters! His review is available on and goes through a real life scenario of the advantage/limitations of FIR along with speaker design. A must read!


For more info on Synaudcon and the great learning/training sessions, make sure to check out their website.