The LM-845 Premium is a SET integrated amp that uses massive output transformers and a massive separate power supply. The driver tubes are 300B and output tubes are 845. I've upgraded the tubes to Western Electric. The authority, richness and soundstage this amp provides is outstanding. With the Aerial 20T V2 speakers it presents a huge soundstage that is silky smooth and powerful.
The Black Box is a Low Frequency Resonator Array that works in conjunction with the Atmospheres and FEQ X4 to solve bass node issues.
I let my current configuration of graphene oxide painted on alternate facing magnetic mats sit undisturbed for about 2 weeks. I listened for just over 2 hours last night. I didn't think my system could go farther in this regard but each musical image is rounder, smoother yet more dynamic. The soundstage is not more precise but is wider and deeper. I hear vocalists moving slightly closer to mics and then hear then move back. I hear slight tones coming-off the body of guitars and pianos. Its all kind of spooky but real.
I can't hardly believe it so I keep asking myself: what is going on? All I can conclude is the magnetic mats when stacked and painted with graphene oxide create a uniform and consistent magnetic field through the component. This magnetic field stabilizes over time and its natural "spinning effect" stabilizes not only the signal flow but the circuits themselves. Subjectively, I guess it really doesn't matter why the sound is improving - all that matters is: it is.