Headset on the Mac Pro

[aviationwiz]

I have the Sennheiser PC150 headset, and I learned today that the line-in port on the Mac Pro won't work for this headset straight out of the box.

My question is, does anyone know of something that will convert the mic connector I have on it to let me use it on the line-in port?

 

[bousozoku]

Use it with Sennheiser's own USB connector. It should work just fine.