I could use a bit of advice. I just bought an Apogee Duet to drive my Sennheiser HD650 cans. The Duet didn't arrive yet and now I'm thinking if it would be possible to drive the 650s through a headphone jack on Bose Companion 5? If I can, then I would return the Duet and get the Companion 5, since I've been looking at the speakers as well (though I'm still undecided there). I tried to search the forum and I even googled this, but only found one older reference to someone using his 650s with Companion 5. Apparently the result wasn't too bad. Anyone has any experience with this? Thank you!