New Product in the Wings!

[Joseph Lubinsky Mast]

This product looks great!
Do you have any advice as to how one could use this in conjunction with a second audio source? I would love to be able to play along with a record, itunes or even a metronome through the headphones while using the headphone amp as well . Do you think that a simple Y-adapter would be sufficient? Would that sacrifice the sound quality to much?