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Computer Audiophile

iPad USB vs MacPro USB difference? external DAC

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I am new to computer hi-fi. Yesterday I connected my new external DAC (Heed Dactilus III) to my MacPro (2006) and I also tried my iPad (2.gen) with a camera-connector-USB adaptor.

The amplifier (Eclipse A501) and speakers (Eclipse 508) were the same.

The music files were Apple Lossless files from iTunes.


There was a noticeable difference in the sound quality. The iPad-USB-DAC was much worse than the MacPro-USB-DAC combination.

I thought that USB signal should be identical in both scenarios.


Could someone help me explain why this difference between iPad and MacPro?




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