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Dirac Live
Is ART any good with 2.0 (stereo) speaker setups?
Yes. In principle, a pair of bass-capable stereo speakers can support one another using ART to address bass clarity and reverberation. However, speakers need to be genuinely bass-capable to benefit, with an low-frequency cutoff of 70 Hz or lower, as a practical minimum.
ART applies MIMO (Multiple-Input Multiple-Output) correction between 20 Hz and 150 Hz, so a speaker must reach well below 100 Hz for the processing to have any audible effect. Room modes also need to fall within the speakers' active range. In a typical room with a 5-meter dimension, the fundamental mode sits around 35 Hz, the 2nd-order mode around 70 Hz, and the 3rd around 105 Hz.
If a speaker can not reproduce those low frequencies, it will not excite room modes within the ART range — and there is little point applying ART. In that case, the SIMO (Single-Input Multiple-Output) correction of Dirac Live Room Correction alone may be equally effective.
For real-world impressions, searching audio forums for users who have tried ART in stereo-only setups is a good starting point. You can also sign up for a trial of ART with Dirac Live Processor to see how it performs in your specific system and room. When trials are available, they can be found here.