This is thick and fuzzy and ultra distorted black metal weirdness. Totally maniacal, quirky and frenzied, but with gorgeous melodies, classical piano, baroque sounding keyboards, frantic, violent drum programming and ragged gasping vocals, all swathed in a hellish wash of fuzz and distortion, with tons of reverb and buzzing, crunchy, speaker destroying distortion.
Think of 665.999 as some strange mix of the gothic black/doom "pop" of Katatonia and the neo-classical shred of Windham Hell. Like a Burzum vs. Bach battle to the death.
Ultra raw yet extremely melodic.