Two pair of SXE-1750S Type-E 6.5" Component speakers - Speaker Size 6-1/2" Design 2-way Component System Tweeter Design Dome Tweeter Size 1" Tweeter Composition Mylar/Titanium Hybrid Woofer Composition Pressed Pulp Fiber Woofer Surround Poly-Foam Peak Power Handling 140 watts RMS Power Handling 45 watts Sensitivity 90 dB Frequency Response 60 - 20000 Hz Impedance (Per Voice Coil) 4 ohms Shallow Mount Installation Yes Top-Mount Depth 1-7/8" Bottom-Mount Depth 2" Cutout Dimensions 5-1/2" x 5-1/2"