I want to get a cheap DAC to connect between an iMac and powered external speakers. I wouldn't mind a DAC/amp combo but it would need to have a pass through feature. But ideally I just want a cheap USB DAC that is powered out of the computer with a mini out. I don't need something amazing, just an upgrade on the iMac onboard DAC.
Do the FiiOs have pass through? What other non-amp options are decent?