Topic: Power amp connect
Hi,
I'm a new owner of ADI-2 DAC. My setup is as follow: ADI-2 DAC --> XLR --> Headphone amp (Airist audio Heron 5) & ADI-2 DAC --> RCA --> Power amp (nuForce STA-200). The ADI-2 DAC match with Heron 5 as expected and this couple drive my HD800s like never before. However, I got trouble when trying the ADI-2 DAC as a preamp. Please help!
My question is:
1. What happens with Auto Ref feature if I turn on both headphone amp and power amp. I have never done that
2. If I turn off Headamp, turn on the Power amp and Auto Ref Level set to on --> I have Auto Ref Level set to - 5dBU, the volume setting is fixed at -21dB and I can not adjust the volume. The speaker is too loud. Is there any volume lock setting that locked my DAC volume in this case? And is this a "level mismatch" between ADI-2 DAC and nuForce STA-200? Can inline attenuator (-12dB) fix this problem?
Thank you all in advance for your support!