Schiit Asgard 2 Preamplifier/Headphone Amplifier. A very nice preamp. I'm really not much of a headphone fan, so I don't often use the headphone amp section, although it does sound quite good. It runs class A, and is extremely hot to the touch...even the volume knob! What are a few singed fingers, when you can have spectacular sound for 249 bucks? This is a crazy-good deal.