4x6" Two-Way Speaker System Specifications RMS Power:  35 Watts MAX Power: 80 Watts Frequency Response: 85Hz - 20 kHz Sencitivity:87dB @ 1w/1m System Impedance: 4 Ohm Mounting Depth: 4.9 Cm Features 4x6" Two-Way Speaker System Black Polypropylene Mica Cone Treated Cloth Surround 1"High Temperature Aluminum Voice Coil 1/2" Polymer Neodymium Dome Tweeter