Boss CH6994 Chaos Series 6 x 9-Inch 4-Way Speakers (Pair) 500 Watts Peak Power Handling; Impedance, 4 OHM Frequency Response, 50Hz20kHz; Spl 1 Watt / 1 Meter, 92 dB Cone Material, POLY INJECTION; Voice Coil, 1-1/4-Inch ALUMINUM Twetter, 1-Inch POLYIMIDE DOME/1/2-Inch PIEZO; Midrange, 2-1/2-Inch POLYIMIDE CONE Mounting Depth, 2-15/16-Inch