I have HD598's paired with X-Fi Titanium HD sound card from my desktop. I will be connecting an amplifier (with preferably low output impedance) via the line-out jack of the TiHD. From here, I want to connect both my speakers as well as my HD598 to my amplifier and the ability to switch between the 2. What would be a good suggestion for me to able to do this? So it goes like: Titanium HD --> "line-out" RCA jack --> amplifier --> connects BOTH speakers (2.1) + headphones with the ability to toggle between the 2 I've been reading that Schiit Magni is a good pair for the TiHD, however it doesn't have the connection I need and I will have to unplug the speakers and connect the headphones and vice versa every time I switch. I also read that the Fiio E09K offers some sort of "pre-amp" that I really have trouble understanding, does it connect to speakers?