[MorganE]

Hi Vinnie,

I have the original version of the Isabellina HPA, and want to use the DAC analogue output to connect to another HP amplifier via RCA.  I have a choice of AC or DC coupling. Can you please recommend/comment on this for me.

Regards,

MorganE

[Vinnie R.]

Hi Morgan,

You can try the "DC coupling" setting (which most likely bypasses an input capacitor of the headphone amp), but if you are hearing a turn on POP or turn off POP, then you should switch to AC coupling.

Best regards,

Vinnie

[MorganE]

Hi Vinnie,

Thanks for your prompt response (as always).  No pop, just a click. 

Thanks again!

I am attaching a link which explains this for those interested in the subject.

http://www.tangentsoft.net/audio/input-cap.html

Regards,

MorganE