B&C Speakers 21" Neodymium Subwoofer, 8 Ohm, 3400W Peak Power, 4.5" Voice Coil, Professional High Output Low Frequency Driver for Concert Sound and Home Theater Subwoofer Systems - 21DS115-8POWERFUL 3400W PEAK 21 INCH SUBWOOFER - Engineered for ultimate low-end performance with 3400W continuous program power and 1700W AES handling to deliver the deepest bass for professional sound systemsHIGH SENSITIVITY NEODYMIUM LF DRIVER - Utilizes a powerful neodymium magnet providing 99 dB sensitivity to ensure maximum output and efficiency while maintaining a lightweight profile for touring racksADVANCED 4.5 INCH ALUMINUM VOICE COIL - Features a next-generation four-layer aluminum voice coil and ventilated gap to reduce power compression and heat during sustained high-volume bass playWATERPROOF REINFORCED SUBWOOFER CONE TREATMENT - Crafted with a specialized waterproof cone treatment on both sides for rugged durability in outdoor concert festivals and high-performance professional installsEXTREME EXCURSION DEEP BASS WOOFER - Delivers incredible physical impact with 16.5mm Xmax and a double silicone spider for precise control over deep low-frequency response reaching down to 30 Hz
