I didn't try the phono input as I don't have a TT.
I think the headphone amp is good at least it drives my Grado SR 125i perfectly. Please note that as I'm not that interested in headphones listening I'm not especially qualified to say.
I use the pre by pass as my Primare I21 is an integrated amp.
Thanks!
It's good to hear that.
Regarding the pre I did try it. Analog, digital and bypass not only in my setup but also using a Gamut D150i where you can bypass the Gamut's pre-amp.
In both cases I always preferred bypassing the Brooklyn's pre-amp.
What pre-amp are you using?
Has anyone tried any other power supplies? The consensus seems to be that a good external power supply really turns it into a great dac!