Audiophilepure

https://www.soundstagehifi.com/index.php/equipment-reviews/1911-nad-masters-m66-streaming-preamplifier

The subterranean bass on “Full of Life,” from Paranoïa, Angels, True Love (24/176.4 FLAC, Because Music Tidal), by Christine and the Queens, was deeper and better articulated with the M66 than with the STR. When the track’s deep, long tones started to pound, they filled up my listening room and held fast, with no discernible overhang.

On its Dirac Live Bass Control web page, Dirac states that “Bass Control leverages all-pass filters, plus machine learning and artificial intelligence, to calculate gains, delays, and all-pass filters for each subwoofer.” Anthem’s ARC Genesis room-correction system allows automatic adjustment of subwoofer phase to optimize it for the main speakers, but it relies on a much older DSP chip and is more limited in what it can do. One feature the STR does have that the M66 doesn’t is home-theater bypass mode, which in the STR includes the subwoofers—they are always in the circuit, whether in multichannel playback or stereo. In my combined stereo-HT system, I have found this invaluable. I know of no other component that offers such flexibility in an HT-bypass mode.

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