The "music library" is a smallish third-floor room in an old 1920s house. Approx. 15'6" x 10'6" with a sloping ceiling. Recent updates (2020) include a dedicated 20A circuit directly from the panel to the room/gear and newer Shunyata power conditioner (Denali 2000/T) for amplifier.
Really great looking system and cool room it really does look like a showroom. And it must sound amazing in the fully tweaked room and love the Pass Class A/Harbeth pairing!