Absolute USA PBT37S 4-Inch Titanium Bullet High Compression Tweeter with 5.4 Oz Ferrite Magnet Pair 4" Titanium Bullet High Compression Tweeter 5.4 Oz Ferrite Magnet 1" High Temperature Kapton Voice Coil 300 Watts Max/50 Watts RMS Impedance 4 OHMS