ManualFEATURES- 4 INCH EDGEWOUND CCA VOICE COIL- 109 dB/SPL SENSITIVITY- 260 W PROGRAM POWER HANDLING- FEM OPTIMIZED MOTOR, PHASEPLUG AND DIAPHRAGM- 500 - 20000 Hz FREQUENCY RANGE- TITANIUM DIAPHRAGM AND FULL SUSPENSION- NEXT GERATION HF DESING- PATENTED IIS INTEGRAL INPUT SURFACE PHASEPLUG..