Audiophilepure

https://www.enjoythemusic.com/superioraudio/equipment/0126/Pass_Laboratories_X600_8_Mono_Amplifier_Review.htm

The Pass Labs X600.8 monoblock amplifiers’ transparency was also evident in its extremely black background, to the point that I could not tell whether my linestage was on mute or set to a realistic volume when no music was playing. The less noise there is, the more details of the music are heard. Even the slightest level of noise can subconsciously be distracting, so one might think that an amp that measures well in this area would be better than one that measures poorly. This is a moot point when it comes to how the music makes one feel. If a component sounds transparent, it is transparent.

When playing either of the prized LPs, these monoblocks’ transparency yielded a phenomenal-sounding midrange, which I noticed more on Music for String Percussion and Celesta, perhaps because a smaller ensemble was used for this piece. Fewer instruments might have masked the sound, but this sound took on the transparency of the Pass Labs monoblocks, resulting in a gorgeous sound.