MTX TERMINATOR522 Features: Polypropylene Cone is Lightweight Yet Retains Stiffness for Excellent Sound Reproduction Mylar Dome Tweeter is Able to Accurately Recreate High Frequency Sound Shallow Mounting Depth Allows the Speakers to be Easily Installed in a Variety of Vehicles RMS Power: 45 Watts Sensitivity: 89dB Frequency Response: 54Hz - 20kHz