DISCOUNT LINK WWW.AMAZON.COM Car Electronics Electrovoice Woofer 101dB sensitivity / Low-Frequency Reproducer / High excursion for low-frequency clarity & punch / Thermally efficient magnet assembly 400 watts long-term power capacity 101-dB sensitivity Thermally efficient magnet assembly for high reliability PROTEF coating helps protect woofer from excessive power peaks Usable Axial Frequency Response in Typical Enclosure (4.0 feet tuned to 40 Hz), Swept One-Third-octave Pink Noise, 4 Volts at 10 Feet Anechoic Environment, Normalized for 1 Watt/1 Meter - 45-3000 Hz Power Handling, Per ANSI/EIA RS-426-A 1980 - 400 watts; Per AES2-1984/ANSI S4.26-1984; 50-500 Hz - 400 watts; 100-1000 Hz - 500 watts Sensitivity (SPL at 1 m, 1 watt input power, nominal impedance) 200 to 3000-Hz Average - 101 dB 100 to 800-Hz Average - 98 dB