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miniDSP Flex

 miniDSP Flex with remote control

Product Overview

The miniDSP Flex is a stereo input, four-channel output compact high-resolution audio processor. It features stereo analog inputs, two digital inputs (SPDIF and optical), USB audio, Bluetooth streaming with LDAC™ and aptX™ HD codecs and automatic Bluetooth input selection, and an OLED front panel with physical volume control.



miniDSP cannot be held responsible for any damage that may result from the improper use or incorrect configuration of this product. Please read this manual carefully to ensure that you fully understand how to operate and use this product, as incorrect use or use beyond the parameters and ways recommended in this manual have the potential to cause damage to your audio system.

Please also note that many of the questions we receive at the technical support department are already answered in this User Manual and in the online application notes on the website. So please take the time to carefully read this user manual and the online technical documentation. And if an issue arises with your unit, please read through the Troubleshooting section first. Thank you for your understanding!


miniDSP Ltd warrants this product to be free from defects in materials and workmanship for a period of one year from the invoice date. Our warranty does not cover failure of the product due to incorrect connection or installation, improper or undocumented use, unauthorized servicing, modification or alteration of the unit in any way, or any usage outside of that recommended in this manual. If in doubt, contact miniDSP prior to use.

The Flex family

There are several versions of the 2-in 4-out miniDSP Flex with different I/O configurations. Refer to the Flex product page for the complete list.

 miniDSP Flex with remote control

Typical applications

The miniDSP Flex has a wide range of applications in home and professional audio. This section illustrates a few of them.

Figure 1 shows the miniDSP Flex used as a digital preamp with subwoofer integration. The Flex provides accurate and flexible integration between the subwoofers and the main speakers as well as comprehensive EQ and tuning options. This is a very cost-effective way to build a complete audio system that includes all the benefits of modern DSP technology. Add the optional Dirac Live software upgrade for world-class room correction.

miniDSP Flex as preamp with subwoofer integration

Figure 1. miniDSP Flex as preamp with subwoofer integration

Figure 2 illustrates a similar use of the miniDSP Flex as a digital preamp, but the output channels have instead been configured to act as crossover for a pair of active 2-way speakers. Amplification can be via a multichannel power amplifier as shown, or a pair of stereo amplifiers.

miniDSP Flex used as preamp, active crossover

Figure 2. miniDSP Flex as preamp and active crossover

In Figure 3, the miniDSP Flex has been used as an accessory in a home theater system, to manage multiple subwoofers. Driven from the A/V receiver's subwoofer output, the miniDSP Flex can be used to independently adjust gain, delay and parametric EQ of each subwoofer for optimum multi-sub performance.

miniDSP Flex for multi-sub management

Figure 3. miniDSP Flex for multi-sub management

Dirac Live upgrade

The miniDSP Flex can be upgraded to run stereo (two-channel) Dirac Live® room correction. This requires an additional purchase for the Dirac Live license. You can either purchase the miniDSP Flex with Dirac Live already activated, or purchase the Dirac Live upgrade at a later time from within the Device Console. Refer to the instructions here:

Note that the upgrade applies per device.


The full specifications are available in the datasheet at the following link: