Technical specifications

• Nominal Diameter: 460 mm (18in)
• Overall Diameter: 460 mm (18.11in)
• Bolt Circle Diameter: 440 mm (17.32in)
• Baffle Cutout Diameter: 421 mm (16.57in)
• Overall Depth: 201.5 mm (7.93in)
• Flange/Gasket Thickness: 13.7 mm (0.54in)
• Impedance: 4 ohm
• Minimum Impedance: 3.9 ohm
• AES Power: 600 W
• Program Power: 1200 W
• Sensitivity: 98 dB
• Frequency Range: 30:2500 Hz
• Voice Coil Diameter: 77 mm (3in)
• Voice Coil Material: Cu
• Voice Coil Former: Glass Fiber
• Voice Coil Depth: 22.4 mm (0.88in)
• Magnetic Gap Depth: 10.5 mm (0.41in)
• Surround Type: Triple
• Spider Profile: 1x variable height waves
• Chassis Material: Aluminum
• Magnet Material: Ferrite Ring
• Demodulating Ring: No
• Flux Density: 1.2 T
• Driver Displacement Volume: 6.1 L (0.215ft^3)

Thiele and small parameters

• Resonance (Fs) - 30 Hz
• DC Resistance (Re) - 3.3 Ohm
• Electrical Q (Qes) - 0.27
• Mechanical Q (Qms) - 13.6
• Total Q (Qts) - 0.26
• Compliance Equivalent Volume (Vas) - 391.4 L
• Diaphragm Area (Sd) - 1207 cm²
• Maximum Linear Excursion (Xmax) - 9.45 mm
• Maximum Mechanical Excursion (Xdamage) - 20 mm
• Moving Mass - System (Mms) - 146.3 g
• Force Factor (BL) - 18.3 Tm
• Voice Coil Inductance (Le) - 1.06 mH
• Moving Mass - Diaphragm (Mmd) - 98.9 g
• Compliance (Cms) - 0.19 mm/N
• Mechanical Resistance (Rms) - 2.0 Kg/s
• Reference Efficiency (Eta Zero) - 3.77 %
• Efficiency Bandwidth Product (EBP) - 111

Shipping Information

• Net Weight: 8.8 kg (19.3lb)
• Shipping Weight: 10.3 kg (22.7lb)
• Shipping Box: 503 x 500 x 258 mm

Notes

1 - AES Power: 2 Hours Test According to AES 2-1984 Rev. 2003
2 - Maximum/Program power is defined as 3 dB greater than AES Power
3 - Xmax: Xmax= [(winding depth - magnetic gap depth)/2] + (magnetic gap depth/3)
4 - Xdamage: Maximum excursion before permanent damage