There are Audiogoners far more technically savvy than I to answer ptss, so hopefully they'll chime in. All electronic devices resonate. They all vibrate to some degree apparently. Putting "dampers"on vacuum tubes to reduce "microphonics" vibrations which surprisingly impacts the electrical performance and therefore the sound being maybe the most understandable form. Old tube gear came with shields that the tubes were cocooned in. Maybe the resonance in transformers which you can actually hear despite no intentional "moving parts" maybe the most obvious. Power cords apparently resonate too. VansEvers told me that the switch settings for the two switches on my CleanLines Jr 11-Analog which my Basis motor is plugged into, "does nothing electronic, just changes resonance". Noticeably changes the sound. I think the Z-Stabilizer provides parallel circuitry to whatever is plugged into the same power receptacle which apparently damps that resonance. Okay, somebody else please respond as I could be all wrong.