MEASUREMENTS
I measured the AudioQuest DragonFly Cobalt with my Audio Precision SYS2722 system (see the January 2008 “As We See It”1). I performed a full set of tests with WAV and AIFF test-tone files played with Pure Music 3.0 on my MacBook Pro running on battery power, and on my iPhone 6S using a Lightning to USB adapter.
A Drok USB tester indicated that with no signal being passed, the Cobalt drew 50mA of current from the host’s USB port, compared with the
