Power Acoustik RF-573 5 x 7 -Inches 3-Way Car Speakers with Polypropylene Cones (Pair) Max Power: 330 Watt, Magnet Volume: 24.3 oz Frequency Response: 45-20kHz, Efficiency (1w/1m dB): 88dB, Mounting Depth 1.75" 1" Voice Coil on Aluminum Former, 4-ohm System Impedance, Quick Disconnect Terminals, 1" Mylar Tweeter Vacuum Formed Polypropylene Cone, NBR Rubber Surround