You could also consider the baby butt 2404H or 2404H-1 as a good top end tweeter with similar dispersion characteristics as the main mid-tweet 4430 horn. The 2404H might not reach up quite as high as the 2405/077 but it will be close. the 2405 or 2405H also will be a lot cheaper than the 077, but make sure any of the above tweeters have a good working original JBL diaphragm or have been rebuilt with a new or new in box JBL diaphragm, never use any aftermarket diaphragm except maybe the Radian units, all other aftermarket diaphragms are junk and will not have the extended or reasonably smooth response of the JBL diaphragm.