What is a DAC and why is it necessary for the HD650 headphones?

A DAC, or digital-to-analog converter, is a device that converts digital audio signals into analog signals. This is necessary for the HD650 headphones because most modern devices only output digital audio signals, which cannot be directly used by analog headphones like the HD650. The DAC is used to convert the digital signals into analog signals that the headphones can understand.

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