B&C 8PS21 WP 8" Replacement Woofer Speaker 400 Watts 8-Ohm 2" Copper Voice coil.

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B&C 8PS21 WP 8" Replacement Woofer Speaker 400W 8-Ohm 2" Copper Voice coil B&C's 8PS21 8'' woofer features a 2'' copper voice coil on a Kapton® former, die cast frame, ceramic ferrite magnet, and a 200 watts RMS power handling rating. A copper ring in the 8PS21's magnetic circuit reduces distortion and extends high frequency response up to 3 kHz. The 8PS21 is an ideal compact pro woofer choice when used singly or in multiples. Specifications

• Nominal diameter: 200 mm (8.0 in)
• Nominal impedance: 8-Ohm
• Minimum impedance: 7.0-Ohm
• Nominal power handling: 200 W
• Continuous power handling: 400 W
• Sensitivity (1W/1m): 94.0 dB
• Frequency range: 70 - 3000 Hz
• Voice coil diameter: 50 mm (2.0 in)
• Winding material: Copper
• Former material: Kapton
• Winding depth: 16 mm (0.62 in)
• Magnetic gap depth: 8 mm (0.31 in)
• Flux density: 1.1 T

Design

• Surround shape: Double Roll
• Cone shape: Exponential
• Magnet material: Ferrite
• Spider: Single
• Pole design: T-Pole
• Woofer cone treatment: None
• Recommended enclosure: 14.0 dm3 (0.49 ft3)
• Recommended tuning: 73 Hz

Parameters

• Fs: 73 Hz
• Re: 5.4
• Qes: 0.36
• Qms: 4.2
• Qts: 0.33
• Vas: 14.0 dm3 (0.49 ft3)
• Sd: 220.0 cm2 (34.1 in2)
• no: 1.5 %
• Xmax: 5.0 mm
• Xvar: 4.0 mm
• Mms: 23 g
• Bl: 12.6 Txm
• Le: 0.5 mH
• EBP: 202 Hz

Mounting Information

• Overall diameter: 225 mm (8.8 in)
• Bolt circle diameter: 210 mm (8.3 in)
• Baffle cutout diameter: 187.0 mm (7.4 in)
• Depth: 91 mm (3.6 in)
• Flange and gasket thickness: 11 mm (0.4 in)
• Air volume occupied by driver: 1.2 dm3 (0.04 ft3)
• Net weight: 3.4 kg (7.5 lb)
• Shipping weight:: 3.7 kg (8.1 lb)
• Shipping box: 220x220x130 mm (8.7x8.7x5.1 in)