PowerBass PS-WB122 Dual 12" Vented Loaded Enclosure Bass is their backbone at PowerBass and their engineers have designed an affordable, yet powerful self contained solution to put a new low in the bottom end of your sound system with PS-WB loaded woofer boxes. They take a unique design approach and engineer the woofers to fit the box, not the other way around like our competition. This gives our enclosures a deeper, tighter bass that handles more power for your hard earned cash. Features - • Heavy Duty Dual 12" Box Design • Computer Optimized Acoustic Chamber • Bass Reflex Aero/Slot Port System • 2-Layer DDC Coated Black Ribbed Paper Cone • 2" BASV High Temperature Voice Coil • Double Pressed Treated Foam Surround • 2-Tone Aircraft Grade Vinyl Finish • Single 4-ohm Input • 550 Watts RMS/1,100 Watts Max Specifications - • Nominal Impedance: Single 4-ohm Input • Bottom Depth: 14.4" • Top Depth: 12.25" • Height: 13.5" • Width: 34" • Material: DDC coated paper cone • Magnet Size: 45 oz. • Sensitivity (1W / 1M): 98 dB • Dimensions (in Inches): 13.5" x 34" x 12.25" (top depth) x 14.4" (bottom depth) • Size: Dual 12" • Frequency Response: 30 Hz - 120 Hz • Power Handling (RMS/Peak): 550 / 1100 watts