If you want speakers that'll make the most out of the power they're given, JBL's GT6 Series speakers are a smart way to go. They're sensitive enough to perk up the sound of a factory radio, but tough enough to handle an outboard amplifier too. These JBLs will impress you with their powerful bass, clear highs, and strong output.
Technical Details:
4 x Car Audio 6.5" GT6 Series 2-way Speakers
Model: GT6-6
Peak Power Handling: 135 watts each
RMS Power Handling: 90 watts per pair / 45 watts each
Impedance: 4 ohms
Frequency Response: 55-20,000 Hz
Sensitivity: 93dB
Plus One polypropylene cone with 30% more surface area
Foam surround
1" titanium laminate dome tweeters
Vented motor design for improved cooling and efficiency
Top-mount Depth: 2-7/16"
Cutout Dimensions: 5-11/16"