IMHO dont waste your money. Go to crescendos page and get their tweets for 24.99 Per set. These sound awesome. If your looking for like 20 a set get the XST's i think one of the guys on here is selling them.
Crescendo Audio :: Tweeters :: CTS-1 Tweeter Set
Contact me to get orders for any of your B2 Audio needs. I am an Authorized Dealer
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