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https://www.stereophile.com/content/eversolo-dmp-a8-streaming-preamplifier

Photos of the unit’s exceptionally well-organized innards reveal two power supplies, one linear, one switching. Eversolo says this approach eliminates “interference and noise between the system circuit and the audio circuit.” The linear PSU circuit consists of a multi-winding toroidal transformer “designed to match the characteristics of analog audio circuits.” The switching power supply, meanwhile, is tailored for the system circuit, where it aims to reduce “ripple and magnetic leakage interference,” theoretically resulting in increased purity of sound. The A8 autosenses the voltage coming from the wall and adapts accordingly: You can use it in the US or overseas without flicking a manual switch.

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