8" In-Ceiling Subwoofer Metal Grill Adjustable switches for changing the speaker phase and crossover points Front Mounted Adjustable Low Pass Crossover Front Mounted 180° Phase Reversal Switch Ideal for large rooms Recommended Amplifier - Bass Power 150 U.S. Patent No. D419, 561 & 6,101,262 Includes: One SpeakerCraft 8.2 BAS Subwoofer One Hole Template One Grill Power Handling: 5-100 Watts Recommended Amplifier Power: 100 watts (undistorted) Speaker Type: In-Ceiling Downward Firing Passive Sub-Woofer Woofer: 8" Dual Voice Coil woofer, IMG cone, Butyle Rubber Surround, Kapton Voice Coil Woofer Construction: Pivoting and Rotating 8" Injection Molded Polypropylene Cone Woofer Frequency Response: 30Hz - 120kHz or 30Hz - 80Hz Sensitivity: 90 (dB) Driver Impedance: 8 (Ohms) Cut out Diameter: 11 15/16" x 3 3/4" Dimensions (Diameter x Depth): 10 1/4"