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I currently have the set up below and I was wondering if for any reason the digital to analogue conversion might not be reaching the speakers as an analogue signal?


iMac--(USB to mini USB)--HRT DAC--(SPDIF)--B-TECH BT31-3 WAY INPUT CONTROLLER--(SPDIF/3.5mm jack)--Speakers (Audio Engine A2)


There is also the option to connect to the speakers with SPDIF rather than 3.5mm will there be any improvement in the signal?