After being suitably impressed by the idea of $5 (each) woofer, and finding myself in a situation of enormous bad luck (car stolen, with tweeters and sub in, but mid-bass and amp/dsp in the house, bitten by a dog, bird poo'd on me, all in about three days) I have a new (to me..) car and needed to get some tweeters and a sub.
New car is an RX8, apparently an ok OEM head unit to take signal from, and too much hassle to replace, so I have been researching tweeters. I didn't want to spend fortunes, they had to meet my 6.5" Pioneer woofers, and have angled mounting cups to enable easy a-pillar install.
I found these, and thought "what could possibly go wrong?"
80gee 2× Super 120W Power Loud Dome Speaker Tweeter for Car | eBay
As soon as they land, I'll let you know...