se,   Thanks for clarifying my situation. I wish I could find an integrated amp like my NAD that has the option to set the sub crossover. Buying an AVR just seems like overkill for my music-only 2-channel set-up.   Wouldn't the tape 2 output on the NAD include the high pass filtered signal...

I'm still trying to figure this out...what connections would I make to the NAD with the line-out on the headphone amp?

Yes, I have the upgraded version. Just purchased it a month ago. I really like the way it sounds.

Thanks for your reply, but I'll go without a headphone amp before I sell the Bifrost. It sounds so much better than the previous DAC I had in my system...and the one before that!

I will be adding a Schiit Valhalla headphone amp to my 2-channel music system and I'm wondering about the connection to my main amp. My source is a Mac mini connected via USB to a Schiit Bifrost DAC. From the DAC I connect to a NAD C356BEE integrated amp. From the pre-outs on the amp I connect...