Abedirov- a quote from the Davinci Web page about their proprietary USB cables :
"Two Configurations : LightSpeed USB comes in a standard configuration, and a split configuration. Standard LightSpeed is used similarly to most USB cables: one connector on each end. Split LightSpeed has one USB-B connector and two USB-A connectors: one for signal, one for power. This configuration can be used with self-powered DACs, such as Da Vinci DAC."
So the LH2 clearly has its own power supply. I use my Short Block adapter to severe the power transferred via th USB. It works great. 👍🏻
"Two Configurations : LightSpeed USB comes in a standard configuration, and a split configuration. Standard LightSpeed is used similarly to most USB cables: one connector on each end. Split LightSpeed has one USB-B connector and two USB-A connectors: one for signal, one for power. This configuration can be used with self-powered DACs, such as Da Vinci DAC."
So the LH2 clearly has its own power supply. I use my Short Block adapter to severe the power transferred via th USB. It works great. 👍🏻