The amp powering those Infinity P363 speakers. I use to have it wired into the PC, so the speaker wires would just run right out of a PCI-slot I screwed some binding posts to, but having the amp inside the PC resulted in too much noise due to powering it off the PSU.
That thing doesn't look like it can produce any more than 10 watts.
What Keyboard are you using in this picture?
Dude, I have that keyboard! One of my best purchases for my computer! I love that thing.