van den Hul Mainserver Hybrid Power Cord 10-outlet digital USB signals travel primarily

digital USB signals travel primarily on the surface (skin) of the conductors

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but with the VPI it just sang

9 Veff / 10 kOhm | 500 mVeff

The circuitry of the ET7-S2 follows closely that of the GAT Series 2

van den Hul Mainserver Hybrid Power Cord 10-outlet digital USB signals travel primarilyThe MAINSSERVER HYBRID has especially been designed bearing uncompromised mains distribution to low power consumption high end audio, video and professional equipment in mind. Low power high end equipment generally concerns signal sources, converters, pre amplifiers and other signal processing equipment which, as a rule, pose a higher demand with regard to low noise mains power. The MAINSSERVER HYBRID therefore incorporates improved powerline noise