JBL GTO19T Premium 0.75-Inch Component Tweeter - Set of 2 Soft-dome tweeter features oversized voice coils for greater heat dissipation and higher power handling resulting in smooth, fatigue free highs Carbon-composite, nonmagnetic baskets maintain their integrity and precision even under the most demanding conditions Low-impedance, three-ohm speakers compensate for the undersized wires found in many of today's cars, and make the most of every watt your car stereo can deliver