The Tweeter for Perfect Car Hi-fi Applications:
DT-284 "The Dome". This tweeter provides everything expected from a top class tweeter: a sensationally linear frequency response, high level reserves, low crossover frequency, compact size and a distinct and appealing design!
Pair of dome tweeters, 60 W, 4 Ω- 28 mm silk cone
- Aluminium voice coil
- Neodymium magnet
- High-quality ABS housing with 8-hole screw connection
- Perfect sound of extra low distortion
- Highest level stability
- Exceptionally long excursion
A crossover network is required for operation! Ideal: CDN-2X 
