I'm not sure how she did it, but the better half managed to fry a 6½ driver in my CS400i - while watching a Barbra Streisand movie!?!?!? I believe I bought the unit in '02, from Crutchfeild, but not sure. I'm thinking the unit should still be under warranty, and that the driver should be user-replaceable. Anyhow, I do have its serial number handy. I'm guessing the driver is a stock item, though looking at the parts lists on the Polk website, I didn't find the specifics for the CS400i. Now what?