I opened up the 2250 and removed the headphone jack, cleaned it, clipped the old wire ends off and re-soldered it. Now it sounds clean without any static. I was thinking about ordering a Mjolnir but I think I will have more fun playing with the 2250 and the SX-780 for now. The SX-780's headphone jack is really powerful. The volume knob starts at the 7:00 position but the 8:30 position is about the volume limit for my HD-650's. I see no issue for this thing to drive a set of HE-6's.