miniDSP 2x4 HD

MiniDSP 2x4 HD, a USB DAC+DSP in a low cost package powered by a powerful Sharc 400MHz floating point DSP
205 USD
Add a UMIK-1
miniDC for Car Audio
Audio RCA cables?
IR remote
  • Description
  • Specifications
  • Support
  • Application Notes
  • Reviews

Introducing the long-awaited “reboot” of miniDSP’s best-selling 2x4 digital audio processor: the miniDSP 2x4 HD! This tiny powerhouse is jam-packed with miniDSP’s tried and proven audio processing functionality: flexible para-metric EQ, Butterworth and Linkwitz-Riley crossovers, advanced biquad pro-gramming, and delay on each output channel. miniDSP’s “one hardware many plugins” concept allows for many interesting future applications!

The upgraded on-board 400 MHz Analog Devices SHARC processor also ena-bles substantial processing upgrades previously available only on more ex-pensive platforms, such as 96 kHz internal processing for true high-resolution audio capability and assignable FIR filter taps for sophisticated equalization, crossover, and room correction capabilities. All to be accessed and programmed with miniDSP’s easy-to-use interface software.

I/O capabilities get an upgrade too, with the addition of USB audio streaming up to 192 kHz and a TOSLINK digital input. The miniDSP 2x4 HD will find application in full-sized hifi and home theater systems, on desktops, in cars, in recording studios — anywhere a compact, simple, yet surprisingly powerful DSP audio processor is needed.


  • ADSP21489 400MHz Sharc DSP floating point engine
  • XMOS Xcore200 for USB control and bidirectional audio streaming
  • 24 bit ADC/DAC resolution
  • Unbalanced inputs switchable with a jumper between 4Vrms and 2Vrms
  • Toslink digital input
  • Unbalanced outputs: Max 2Vrms
  • USB Audio Class 2 Bidirectional streaming with ASIO drivers, driverless under MAC OSx
  • 4 preset configuration, recallable via IR, Software
  • Plug&Play USB driver and real time Software configuration using miniDSP plug-ins
  • Device does not required a PC once configured
  • External single 12V supply

2x4HD diagramv2

Product Downloads

Control plugin (Included in purchase)

The download will automatically become available under your UserDownloads section once the product purchased. Please make sure to read the user manual for more details

What's in the box?

  • 1 x MiniDSP 2x4 HD, board assembled and ready to use
  • 1 x 12V power supply with UK/EU/US/AU plugs
  • 1 x shielded USB cable
  • 1 x plugin automatically included in the user downloads

Optional Accessories

Comparing the miniDSP 2x4HD to the 2x4 basic board. 

miniDSP 2x4 miniDSP 2x4 HD

28/56bit Fixed point DSP Engine

ADSP12489 400MHz Sharc floating point DSP

24 bit ADC/DAC resolution

24 bit ADC/DAC resolution

Unbalanced analog audio inputs switchable with a jumper between 0.9Vrms and 2Vrms

Unbalanced analog audio inputs switchable with a jumper between 4Vrms and 2Vrms

Digital I/O: I2S in/out

Digital I/O: USB audio I/O, Toslink input (44.1~192kHz), I2S I/O (not enabled yet)

Unbalanced analog audio outputs: Max 0.9Vrms

Unbalanced analog audio outputs: Max 2Vrms

Plug&Play USB driver and real time Software configuration using miniDSP plug-ins

Plug&Play USB driver and real time Software configuration using miniDSP plug-ins


Asynchronous USB Audio Class 2 Bidirectional streaming with ASIO drivers under Windows, driverless under MAC OSx

Device does not required a PC once configured

Device does not required a PC once configured

Software: miniDSP 2x4 plug-ins

Software: miniDSP 2x4 HD1 plug-in

Control: Volume control by potentiometer on 3pin header

IR remote + multicolor LED for preset indication

USB self powered device and wide range of DC power options (4.5 to 24VDC)

External single 12V supply (UK/EU/US/AU adaptors provided)

Digital Signal Processor Engine Analog Devices Fixed point DSP SHARC

Internal Processing resolution
& Sample rate

32 bit / 96kHz with 2x4HD1 plugin

Input/Ouput Configuration

2 in / 4 out

Audio Input Connectivity

Unbalanced analog input, RCA terminated
Stereo Digital Inputs: TOSLINK (optical)
Stereo USB audio input: USB Audio
Supported ASCR: 20~216kHz

Audio Output Connectivity

Unbalanced output, RCA terminated
USB Audio streaming: USB audio 4ch

Input / Output Max Levels

IN: 2Vrms / 4Vrms (jumper-selectable)
OUT: 2Vrms

Input Impendance
10 kΩ 
Output Impedance 560 
Calibration Software miniDSP 2x4 HD1 plug-in
Filtering Technology FIR + IIR
DSP Presets Up to 4 presets
Dimensions 27 x 119 x 107 mm
Power 12 VDC single supply
2.1 mm round plug
Impulse Response Correction
Infrared Remote Learning
Win/Mac Compatible
UMIK-1 Included
Bass Management
Room EQ Wizard Support

Application notes on miniDSP 2x4 HD

In this application note, we will show you how to design an active 2-way loudspeaker with the miniDSP 2x4 HD. Using the 2x4 HD, you can either create a conventional (Linkwitz-Riley or Butterworth) crossover, or a linear phase crossover.

In this application note, we will show you how to integrate a subwoofer with your existing loudspeakers by using a miniDSP 2x4 HD. You can use an existing preamp, or replace a preamp and a DAC with the miniDSP 2x4 HD. (In the latter case, you will need to program a remote control to adjust volume in the miniDSP 2x4 HD.)

In this application note, we show you how to use Room EQ Wizard (REW) and its integration with miniDSP to equalize your subwoofer.

Thursday, 21 April 2016
I really like this unit and would recommend it to others for digital 2-way crossover (DIY m, subwoofer integration, room EQ. My use so far has been a 2-way system, each channel comprised of a 6" woofer and planar midtweeter. Currently I'm using Bessel filters at 1kHz with tweeter polarity inverted. I purchased this unit instead of the original 2x4 because I wanted digital inputs, and the option to load FIR filters. USB audio is a huge feature, allowing any computer to play music with excellent sound quality. (I have found that some cheap USB -> Toslink devices force Windows to resample to 48kHz; Windows resampling has a lowpass filter at 5kHz!) The USB input offers MUCH improved sound vs. the analog inputs coming from a laptop or cell ph I found it fairly easy to get started with REW. I measure each driver several times, apply windowing and average the resp. The input EQs can then be used for reducing room modes and applying a "house curve". I am having issues with calibration in REW (sometimes the resultant EQ curve produces a very bright or thin sound) but have been compensating for this by ear with the Input EQs. Apart from the REW issues, which have nothing to do with the unit, I do have a few issues so far which keep it from being a 5-star review. 1. Sometimes the plugin requires resynchronization although nothing has changed. 3. Sometimes the PEQ display becomes unresponsive to settings changes and plugin requires restart
Mike Kuehn

miniDSP 2x4HD Calibration System (Oct 2016)

John Sciacca takes us through the steps of tuning his room with a 2x4HD with the help of REW + UMIK-1

''This is certainly no substitute for taking an audio calibration course such as those offered by the Home Acoustics Alliance. However, this is a terrific way to get your feet wet in audio calibrations for a minimal investment, add a justifiable “audio calibration” line item to your installs, and leave a client’s home with measured proof that you have made their system sound as good as possible in their room.''

John Sciacca from Residential Systems

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