Power Handling: Peak: 250 watts RMS: 50 watts Silver Alpha-Cellulose Cones Moisture Resistant Rubber Surround Neo-Mylar Soft Dome Tweeter Anti-Resonant Stamped Steel Basket Spade Speaker Terminals for Quick Installation 4 ohms impedance Frequency Response: 58Hz-20kHz Sensitivity: 89dB Mounting depth: 1-3/4"e; Grills NOT Included