miniDSP DDRC-24 (with Dirac Live)¶
The miniDSP DDRC-24 is an extremely compact and cost-effective stereo-input, four-channel output audio processor for active crossovers, subwoofer integration, multi-subwoofer management and other audio processing applications. It features stereo analog inputs, TOSLINK optical digital audio input, and USB audio streaming.
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 miniDSP.com 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 miniDSP DDRC-24 has a wide range of applications in home and professional audio. This section illustrates a few of them.
Figure 1 shows the miniDSP DDRC-24 used as a digital preamp and two-way crossover. The DDRC-24 provides accurate and flexible integration between the subwoofers and the main speakers as well as comprehensive EQ and tuning options.
Figure 2 illustrates a similar use of the miniDSP DDRC-24 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.
Dirac Live room correction¶
The miniDSP DDRC-24 (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.
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.
The full specifications are available in the datasheet at the following link: