Specifications:

• Nominal diameter 530 mm (21.0 in)
• Nominal impedance 4 Ω
• Minimum impedance 4.2 Ω
• Nominal power handling * 1700 W
• Continuous power handling * 3400 W
• Sensitivity (1W/1m) * 97.0 dB
• Frequency range 33 - 1000 Hz
• Voice coil diameter 116 mm (4.5 in)
• Winding material Copper
• Former material Glass Fibre
• Winding depth 34 mm (1.34 in)
• Magnetic gap depth 14 mm (0.55 in)
• Flux density 1.15 T

Design

• Surround shape Triple Roll
• Cone shape Radial
• Magnet material Neodymium Inside Slug
• Spider Double Silicone
• Pole design T-Pole
• Woofer cone treatment TWP Waterproof Both Sides
• Recommended enclosure 250.0 dm3 (8.83 ft3)
• Recommended tuning 32 Hz

Parameters

• Fs 33 Hz
• Re 3.6 Ω
• Qes 0.37
• Qms 7.7
• Qts 0.36
• Vas 278.0 dm3 (9.7 ft3)
• Sd 1680.0 cm2 (260.4 in2)
• η₀ 2.6 %
• Xmax 14.0 mm
• Xvar 15.0 mm
• Mms 335 g
• Bl 24.8 Txm
• Le 1.7 mH
• EBP 89 Hz

Mounting And Shipping Info

• Overall diameter 547 mm (21.5 in)
• Bolt circle diameter 527 mm (20.7 in)
• Baffle cutout diameter 508.0 mm (20.0 in)
• Depth 250 mm (9.9 in)
• Flange and gasket thickness 14 mm (0.53 in)
• Air volume occupied by driver 15.0 dm3 (0.53 ft3)
• Net weight 14.0 kg (30.8 lb)
• Shipping units 1
• Shipping weight 16.4 kg (36.1 lb)
• Shipping box 590x590x300 mm (23.1x23.1x11.8 in)