Yep. that's exactly what i did. i switched the plugins at the DAC and the effect was reversed. So it's defiantly the DAC/amp. I also i tried streaming from windows and the effect was the same. I cannot control the balance on the mac for the TEAC USB volume output. the controls are all locked.
Anyway, I ordered a new TEAC AI-501DA from AMZN and received it today. Tests confirm the previous unit was indeed off-balance. The new one I got sounds much more balanced. The dB indicators support this. Much more balanced. The offset seems to have significantly been reduced. Will be returning the de