Testing my new camera and lightbox

I picked up a 20" light box last week to help improve the quality of the pictures for the website. Last night I had some time so I decided to set it up and take a few shots of my headphones:

[attach=1]  [attach=2]  [attach=3]  [attach=4]

I'm still trying to figure out the best exposure, f/stop and shutter speed.

What do you guys think?