B&C Speakers 12NDL76-8 Multicolor Woofer sku-5157584672

B&C Speakers 12NDL76-8 is a Multicolor, 12.0" pro audio woofer listed under Restored Automotive, SKU sku-5157584672. It is intended for car and motorcycle audio installations. Its 12.0 in (320 mm) driver uses a neodymium motor, an exponential cone, a double-roll surround, a single inside slug spider and a straight pole. The cone has no treatment. The ventilated gap helps dissipate heat and reduce thermal compression. Nominal impedance is 8; minimum impedance is 6.2. Nominal power handling is 400 W, continuous power handling is 800 W, and program power capacity is listed as 800 W continuous. Sensitivity is 100 dB, with a listed sensitivity of 100.0 dB at 1W/1m. The frequency range is 50 to 2000 Hz. The aluminium voice coil measures 76 mm (3.0 in), with a 19.0 mm (0.75 in) winding depth and a glass fibre former. Magnetic gap depth is 10.0 mm (0.4 in), and flux density is 1.25 T. The recommended enclosure volume is 42.0 dm3 (1.48 ft3), tuned to 65 Hz. The driver occupies 2.5 dm3 (0.08 ft3). Resonance frequency is 50 Hz; Re is 5.3, Qes is 0.21, Qms is 4.2, Qts is 0.2, Vas is 73.0 dm3 (2.5 ft3), and Sd is 522.0 cm2 (80.9 in2). The specifications also list 4.3 %. Xmax is 7.0 mm, Xvar is 6.5 mm, Mms is 53.0 g, Bl is 20.1 Txm, Le is 1.0 mH, and EBP is 238 Hz. Overall diameter is 315 mm (12.4 in), bolt circle diameter is 298 mm (11.7 in), baffle cutout diameter is 283.0 mm (11.1 in), mounting depth is 141 mm (5.5 in), and flange and gasket thickness is 14 mm (0.55 in). Net weight is 3.9 kg (8.6 lb). Shipping units: 1; shipping weight: 4.8 kg (10.58 lb). The shipping box measures 360 x 360 x 200 mm (14.17 x 14.17 x 7.87 in).