I was going to ask if your PA was in stereo or mono to bring up the fact that Chibi Nappa points out about most PAs but I guess your all set there.
Just one other fact with PCs and PAs you'll have to use a ground lift on your power supply cord or you'll get this buzz that you'll need to track down! So to save you some time just lift that ground on your Dell.
♫♪♫ I have a fever and the cure is cowbell ♫♪♫ .......... *LIVE FREE OR DIE* .......... ♫ I'm all ears ♫
☼ Mucho Loco Henry Areebah! ☼
Any mic you buy will be perfectly suited to your needs, until you use it long enough to learn that it's not.