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miniDSP Flex Eight (with Dirac Live)

 miniDSP Flex Eight (DL) with remote control

Product Overview

The miniDSP Flex Eight (DL) is a stereo input, eight-channel output compact high-resolution audio processor. It features 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.

Stereo (two-channel) Dirac Live provides world-class room correction, while a full suite of miniDSP’s powerful audio processing tools and flexible I/O routing support applications such as subwoofer integration and active speakers.



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.

Typical application

The miniDSP Flex Eight (DL) is ideal for compact active loudspeaker solutions. Any outputs that are not used for the speaker can be used for independent subwoofers.

Figure 1 shows the miniDSP Flex Eight (DL) used as an active crossover with two subwoofers integrated and stereo (two-channel) Dirac Live room correction. With multiple digital inputs including Bluetooth audio streaming, this is a very cost-effective way to build a modern active speaker system.

miniDSP Flex Eight (DL) active speaker system with dual subwoofer integration  and stereo (two-channel) Dirac Live room correction

Figure 1. miniDSP Flex Eight (DL) active speaker system with dual subwoofer integration and stereo (two-channel) Dirac Live room correction

Of course, a full four-way active speaker could be built instead, or a two-way speaker with up to four independent subwoofers.

Dirac Live room correction

The miniDSP Flex Eight (with Dirac Live) executes stereo (two-channel) Dirac Live® digital room correction, from Dirac Research. Dirac Live's mixed-phase filtering technology will improve the imaging of your system, minimize the effects of room modes and resonances, and improve dynamics and clarity.

To accomplish this, the Dirac Live software steps you through the procedure for taking measurements around your listening area. It employs a sophisticated analysis algorithm to make the optimal correction across the whole listening area, not just at a single point. You have full control over the target frequency response. Measurements are taken with the miniDSP UMIK-1 or UMIK-2 calibrated acoustic measurement microphone.

Illustration of Dirac Live magnitude response correction

In addition to correcting magnitude response, Dirac Live® corrects the system's impulse response, which reflects how the system responds to a sharp transient such as a drumbeat. Reflections, diffraction, resonances, misaligned drivers, and so on, all combine to smear out the transient. Impulse response correction is a critical factor for accurate sound-staging, clarity and bass reproduction.

Illustration of Dirac Live impulse response correction


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