miniDSP 2x4 Digital Signal Processor

Manufacturer: miniDSP

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Product ID: miniDSP2x4

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Only the 2x4 HD version is available now.

Follow this link to the 2x4HD.

MiniDSP 2x4 Rev B / 2Vrms Digital Signal Processor

Now includes free redemption code for plug-in, a $10 value!

*Used in the Linkwitz LXmini Speaker Kit*

A low cost Digital Signal Processor for audio applications. Great sound in a tiny package.

The miniDSP 2x4 in a box is a flexible pocket size DSP processor with 2 x analog IN, 4 x analog OUT. Combined with a plug-in software for programming, one can configure the on board Audio processing filters real time from a PC or Mac environment. Once the board configured, the device operates standalone and doesn't require a computer anymore. For more information on potential applications, the miniDSP website.

Technical Specifications

- 28/56bit DSP Engine
- 24 bit ADC/DAC resolution
- 48kHz sampling rate
- Unbalanced inputs switchable with a jumper between 0.9Vrms and 2Vrms
- Unbalanced outputs: Max 0.9Vrms
- Digital Audio input/outputs via I2S
- Nichicon Muse Audiophile capacitors
- Volume control by potentiometer on 3pin header
- 5pin, 2.54mm pitch header for panel mount USB connector
- Plug&Play USB driver and real time Software configuration using miniDSP plug-ins
- Device does not require a PC once configured
- USB self powered device
- Power with "wall wart" + USB cable or wide range of DC power options (power supply 4.5 to 24VDC with 2.1mm plug) - not included

Product Downloads

- miniDSP 2x4 datasheet

- miniDSP 2x4 User Manual

Digital Signal Processor Engine	Analog Devices Fixed point DSP

Internal Processing resolution & Sample rate	24-56 bit / 48 kHz
Input/Ouput Configuration	2 in / 4 out
Audio Input Connectivity	Unbalanced input, RCA terminated
Audio Output Connectivity	Unbalanced output, RCA terminated
Input / Output Max Levels	IN: 0.9Vrms / 2Vrms (jumper–selectable) OUT: 0.9Vrms
Input Impendance	0.9Vrms position = 8.8 kΩ /2Vrms position = 20 kΩ
Output Impedance	560 Ω
Calibration Software	miniDSP 2x4 plug-ins
Filtering Technology	IIR
DSP Presets	-
Dimensions	26x107x94 mm
Power	Powered from USB cable 5 ~24Vdc input via DC 2.1mm round connect Current requirement: 150mA @5V
Impulse Response Correction	✘
Infrared Remote Learning	✘
Win/Mac Compatible	✔
UMIK-1 Included	✘
Bass Management	✘
Room EQ Wizard Support	✔

Each miniDSP 2x4 Purchase Includes:

1 x miniDSP 2x4 in an aluminum enclosure (as pictured)
1 x shielded USB cable
1 x miniDSP Plug-in code ~ a $10 value

Your code is shipped with the miniDSP unit
Redeem @ miniDSP.com (create a user account @ www.minidsp.com> log in > go to www.minidsp.com/coupon > select appropriate plug-in > enter code & click "Validate" > download to your computer from your account via "User Downloads at top right of screen)

miniDSP 2x4 available plug-ins

Support

Technical assistance and support provided by miniDSP
Visit minidsp.desk.com

Not rated yet

Wow!

Reviewed by brianb on 04/01/2017

I'm not a big fan of using EQ for room correction, feeling that it is better to fix the physics by adding absorption, bass traps, resonators, etc. and starting with a properly placed, reasonably flat transducer system. So this review is limited to the MiniDSP as an active crossover. I've been working with audio DSP since the dawn in the early 90's (Peak Audio, Media Matrix, etc.).
This is a very good deal in a fixed architecture processor that offers plenty of programmable options, including multi-band parametric EQ and various filter alignments up to 48dB/Oct. If you are an audio professional or even an advanced hobbyist, you should have no problem configuring this unit. I was going to design-build a tube-based crossover for my system and bought this for experimentation with crossover frequencies and slopes. Much to my surprise, the quality is so good I may end up just keeping this in place.
For pro applications, they make a balanced I/O version apparently not stocked by Madisound but available through the MiniDSP website. Also some bare board versions. Unfortunately freight from Hong Kong does drive up the price. Madisound is the best deal for the models they have in stock.

A Totally Game-Changing product

Reviewed by perrymarshall on 11/02/2014

Now that you can buy a 24 bit high quality digital crossover for $115, you'll never design speakers the same way again. This has remarkably high quality Digital to Analog Converters; this crossover sounds *significantly* better than the Behringer DCX2496, and is roughly comparable in features.

Amplifiers are cheap so this unit gives you the ability to deal with all kinds of difficulties in speaker design with ease. You get notch filters with variable frequency and Q, shelf filters, and multiple crossover slopes with level controls and time delay. This unit also allows you to sum the bass channels to mono.

I designed a 2-way system that would have been quite difficult to implement with passive filters, it worked very easily with this unit. Plus I was able to make an actively assisted 6th order bass reflex, with ability to sculpt low end response and out-of-band protection with tremendous precision.

Active system design is in such easy reach now, since everybody has an extra amplifier or receiver on hand. You can buy a new or used amp often for $100-200 or less - so even the audiophile on a shoestring budget can design kickass systems.

This has other interesting applications. It can be an active equalizer (similar to what Bose does in its 802 and 901 systems), and the 5 volt USB power works at home or in your car. You use the software on your computer to build the filters, load the configuration into the unit, unplug and go.

Eventually the world is going to catch on to this. Totally game changing.

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