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With the introduction of the new Sigma Pro and Sigma Flagship portable DAC/headphone amplifiers, Questyle brings its current mode amplification technology full circle—combining the company’s signature ...

David William Plummer began his career at Microsoft as an intern on the MS-DOS team and was later offered a full-time position. During his 10 years ...

Dave Plummer, a veteran Microsoft developer who contributed to the creation of Task Manager, ZIP folders, and Windows Product ...