In my experience removing the hash from the mains has a bigger impact than constant Voltage. A good power supply can accommodate quite substantial voltage swings at the input so constant voltage of the mains is less critical. I replaced a PurePower with a Torus AVR and never looked back. With what I know today, I wouldn’t even bother with the AVR version and just purchase the RM version. The relays of the AVR are rather noisy when they switch. I own a TOT and an AVR and they do exactly what is advertised. Excellent products and excellent support from Ross Whitney.
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