2 4 HD KIT - MiniDSP

2X4 HDCOMPACT 2-IN 4-OUTHIGH-RESOLUTION AUDIOPROCESSOR2X4 HD KIT2-IN 4-OUT HIGHRESOLUTION AUDIOPROCESSOR CIRCUIT BOARDUser ManualminiDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice1

Revision 8V1.9V1.9aV2.0V2.1V2.2V2.3V2.4DescriptionFirst preliminary release versionAdded kit board, installersUpdated installation procedureUpdated installation procedure, added USB AudioUpdated installation procedureUpdated software installation, firmware updateprocedure. Added IP address field, miniDSPremote.Various corrections, updated USB AudioAdding I2S support for outputsAdded configuration examplesRemoved kit board as NLAAdded 3rd party logosKit no longer NLACorrected crossover screenshotsScreenshot correctionUpdated support linksAdobe AIR and Flash no longer neededDate15 January 201631 January 201622 February 201621 March 201631 January 201717 August 201822 August 201827 November 201831 December 20185 April 20192 July 201923 August 201931 January 202028 April 20206 July 20201 February 2021miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice2

TABLE OF CONTENTSImportant Information . 5System Requirements . 5Disclaimer/Warning . 5Warranty Terms . 5FCC Class B Statement. 6CE Mark Statement . 6A note on this manual . 61Product overview. 71.1Typical applications . 72The miniDSP workflow. 93Software installation . 113.1Windows . 113.1.1Possible Windows installation issues. 113.1.22x4 HD plugin installation . 123.1.3USB Driver installation . 123.2Mac . 133.2.1Possible Mac installation issues . 133.2.22x4 HD plugin installation . 134Hardware connectivity. 144.1Digital input. 144.2Analog inputs and outputs . 144.3USB . 154.4DC power . 155The 2x4 HD Kit board . 165.1Input sensitivity Jumpers . 165.2I2S headers. 175.2.1I2S overview . 175.2.2I2S details . 185.2.3Additional I2S usage notes . 186Configuring the 2x4 HD . 196.1Synchronizing with the processor . 206.2Signal flow and processing overview. 216.3Key features . 216.3.1Master control . 216.3.2Configuration/preset selection . 226.3.3Inputs & Routing . 226.3.4Input selection . 226.3.5Routing matrix . 236.3.6Outputs . 23miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice3

6.4Plugin configuration guide . 246.4.1Subwoofer control / multisub . 246.4.2Subwoofer integration (2.1 system) . 256.4.3Two-way active speaker . 266.4.4Stereo supporting woofers/FAST . 277Plugin reference. 287.1Input channel strips . 287.2Routing . 297.3Output tab . 307.3.1Channel strip layout . 307.3.2Channel label . 307.3.3Level meter and gain control . 307.3.4Parametric EQ. 317.3.5Crossover. 337.3.6Compressor . 357.3.7FIR . 367.3.8Invert and mute . 367.3.9Time delay . 367.4Custom biquad programming . 377.4.1What’s a “biquad? . 377.4.2Using custom biquad programming . 377.4.3Biquad design software. 397.5FIR filtering and design . 407.5.1FIR filtering overview . 417.5.2FIR filter design software . 417.5.3Filter file format. 417.5.4Loading filter coefficients . 427.6Working with configurations . 437.6.1Online and offline mode . 437.6.2Selecting a configuration . 437.6.3Saving and loading configurations . 447.6.4Restoring to defaults. 447.7Keyboard shortcuts . 458USB Audio . 468.1Mac OS X . 468.2Windows . 479Infrared remote control . 4810 Additional information . 4910.1 Specifications . 4910.2 Firmware upgrade . 5010.2.1 Windows . 5010.2.2 macOS / OS X . 5210.3 Troubleshooting . 5410.4 Obtaining support . 55miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice4

IMPORTANT INFORMATIONPlease read the following information before use. In case of any questions, please contact miniDSP via thesupport portal at support.minidsp.com.SYSTEM REQUIREMENTSTo configure the miniDSP audio processor, you will require a Windows PC or Apple Mac OS X computer withthe following minimum specification:Windows PC with 1GHz or higher processor clock speed. Intel Pentium /Celeron family, or AMD K6 /AMDAthlon /AMD Duron family, or compatible processor recommended. 512 megabytes (MB) of RAM or higher Keyboard and mouse or compatible pointing device USB 2.0 port Microsoft Windows Vista SP1/ XP pro SP2/Win7/Win8.1/Win10 Microsoft .NET framework v3.5 or laterMac OS X Intel-based Mac with 1 GHz or higher processor clock speed 512 megabytes (MB) of RAM or higher Keyboard and mouse or compatible pointing device USB 2.0 port OS X 10.8 or higher, macOS 10.12 or higherDISCLAIMER/WARNINGminiDSP cannot be held responsible for any damage that may result from the improper use of this productor incorrect configuration of its settings. As with any other product, we recommend that you carefully readthis manual and other technical notes to ensure that you fully understand how to operate this product. TheminiDSP audio processor is a powerful tool, and misuse or misconfiguration, such as incorrectly set gains orexcessive boost, can produce signals that may damage your audio system.As a general guideline, you should perform the initial configuration of the miniDSP audio processor beforeenabling audio through any connected output device or amplification. Doing so will help ensure that thesoftware is correctly configured.Finally, note that the miniDSP audio processor is a very flexible device, and many of the questions we receiveat the tech support department are already answered in this user manual and in the online application noteson the miniDSP.com website. So please take the time to carefully read this user manual and the onlinetechnical support. Thanks for your understanding!WARRANTY TERMSminiDSP Ltd warrants this product to be free from defects in materials and workmanship for a period of oneyear from the invoice date. Our warranty does not cover failure of the product due to incorrect connectionminiDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice5

or installation, improper or undocumented use, unauthorized servicing, modification or alteration of the unitin any way, or any usage outside of that recommended in this manual. If in doubt, contact miniDSP prior touse.FCC CLASS B STATEMENTThis device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: This device may not cause harmful interference. This device must accept any interference received, including interference that may cause undesiredoperation.Warning: This equipment has been tested and found to comply with the limits for a Class B digital device,pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection. Thisequipment generates, uses and can radiate radio frequency energy and, if not installed and used inaccordance with the instructions, may cause interference to radio communications. However, there is noguarantee that interference will not occur in a particular installation. If this equipment does cause harmfulinterference to radio or television reception, which can be determined by turning the equipment off and on,the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.Notice: Shielded interface cable must be used in order to comply with emission limits.Notice: Changes or modification not expressly approved by the party responsible for compliance could voidthe user’s authority to operate the equipment.CE MARK STATEMENTThe 2x4 HD has passed the test performed according to European Standard EN 55022 Class B.A NOTE ON THIS MANUALThis User Manual is designed for reading in both print and on the computer. If printing the manual, pleaseprint double-sided. The embedded page size is 8 ½” x 11”. Printing on A4 paper will result in a slightlyreduced size.miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice6

1 PRODUCT OVERVIEWThank you for choosing the miniDSP 2x4 HD or 2x4 HD Kit audio processor. The miniDSP 2x4 HD is anextremely compact yet powerful and flexible digital audio processor for active crossover and other audioprocessing applications. It features: Asynchronous XMOS USB input for streaming audio (up to 192 kHz) Stereo digital optical TOSLINK input Two analog input channels and four analog output channels Parametric EQ on all input and output channels, Butterworth and Linkwitz-Riley crossovers up to 48dB/octave, and advanced biquad programming for an unlimited range of filters and crossover types FIR filtering on every output channel (total 4096 taps) Routing matrix for flexible channel assignment and configuration Real-time configuration of all processing parameters Volume control by infrared remote Four on-board presets, selectable by infrared remote1.1 TYPICAL APPLICATIONSThe miniDSP 2x4 HD has a wide range of applications in home and professional audio. In this example, the2x4 HD acts as both preamp and two-way crossover:Figure 1 - 2x4 HD as preamp and 2-way crossoverminiDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice7

The miniDSP 2x4 HD is a perfect solution for subwoofer integration, providing accurate and flexibleintegration between the subwoofers and the main speakers, as well as comprehensive EQ and tuningoptions. In this role, the 2x4 HD is added after the preamp, as shown here:Figure 2 - 2x4 HD for subwoofer integration (2.1-way)The miniDSP 2x4 HD is a perfect solution for multi-subwoofer management f

V1.0 First preliminary release version 15 January 2016 V1.1 Added kit board, installers 31 January 2016 V1.2 Updated installation procedure 22 February 2016 V1.3 Updated installation procedure, added USB Audio 21 March 2016 V1.4 Updated installation procedure 31 January 2017 V1.5