Boss SE433 CHAOS 4-Inch X 10-Inch 400 Watt 3-Way Speaker 4" x 10" 3-Way Speaker 400W Peak Power Handling 4 OHM Impedance 100Hz - 18KHz Frequency Response Poly Injection Cone Material POWER HANDLING, PEAK 400 Watts MAGNET STRUCTURE, 2O OZ; IMPEDANCE, 4 OHM FREQUENCY RESPONSE, 100Hz18kHz; SPL 1 WATT/1 METER, 90 dB CONE MATERIAL, POLY INJECTION; VOICE COIL, 1-Inch ALUMINUM TWEETER, 1-Inch POLYIMIDE DOME; MIDRANGE, 2-Inch POLYIMIDE CONE