7 Driver 12BASS1K64PLUS4 12" 800w 4+4 Bass Woofer

This item is brand-new, factory sealed.

Frequency response: 20 to 1000 hz .
* Resonance frequency: 28.161 hz .
* Cone effective area (sd): 0.0471 sq.m .
* Equivalent volume (vas): 69.456 l .
* Compliance (cms): 220.073u m / n .
* Mass diaphragm (mmd): 139.246 g .
* Total mass (mms): 145.132 g .
* Bl product: 16,512 tm .
* Q mechanical (qms): 10400 .
* Q electric (qes): 0.311 .
* Q total (qts): 0.302 .
* No (efficiency reference): 0.48% .
* Sensitivity (@ 1w, 1 m) -free-air: 88.854 db .
* Resistance: 1.6 + 1.6 or 3.2 + 3.2 ohms / vdc .
* Nominal impedance: 4 + 4 ohms .
* Excursion of the cone without distortion (x max): - + 11.0 mm .
* Flow density in gap: 6,500 gauss .
* Musical power: 800 + 800 w .
* Rms power: 400 + 400 w .
* The thiele-small parameters are obtained after a sinusoidal level of 20hz is applied for a period of 30 minutes with the coils in series. Mechanical parameters: .
* Nominal diameter: 12 inches .
* Ferrite diameter: 169 x 24 mm .
* Coil diameter: 2.5 inches .
* Coil height: 26 mm .
* Coil wire material: copper .
* Coil wire section: round .
* Coil shape: * kapton .
* Gap height: 9 mm .
* Housing material: aluminum .
* Ferrite material: barium .
* Weight: 8.5 kg .
* Volume occupied in the cabinet: 3.0 liters .
* * Kapton * registered trademark of dupont.