Which bullet tweeters do you like.

[BMS]

large magnet ferro fluid. https://www.amazon.com/Epic-Pro-Audio-ET2000-Compression/dp/B019YLO20E/ref=lp_13902269011_1_8?srs=13902269011&ie=UTF8&qid=1480637336&sr=8-8

[BMS]

ive never heard of a diaphragm for a horn that has a rubber surround like those.

[neuspeedescort]

if a tweeter isn't a ribbon or silk it's not worth installing. composite or bullet tweeters are to sharp.