I posted a bit ago noting that I had grabbed a set of Planar Media 9s. Anyways, great speakers, especially for the price. But, with my Sennheiser 497s, there is a constant, never ending hiss. I can plug the headphones directly into my Audigy 2 and then there is no hiss but the Monsoon controller seems to have some sort of interference issue, I suspect, at least, since the only sources of interference I can figure are the video card (forced to be right next to the sound card due to this being a small form factor system) which is negated since plugging it into the card itself has no hiss or the LCD monitor, a Hitachi CML174SXW (which does have an integrated DC system instead of a 'brick'). But turning that off and unplugging it doesn't help, either.

Any ideas? Or is the volume controller on the PM9 just hissy, normally?

Thanks