Technical specifications

• Nominal Diameter: 300 mm (12in)
• Overall Diameter: 311 mm (12.24in)
• Bolt Circle Diameter: 294 mm (11.57in)
• Baffle Cutout Diameter: 284 mm (11.18in)
• Overall Depth: 133 mm (5.24in)
• Flange/Gasket Thickness: 8 mm (0.31in)
• Impedance: 4 ohm
• Minimum Impedance: 3.6 ohm
• AES Power: 250 W
• Program Power: 500 W
• Sensitivity: 95 dB
• Frequency Range: 50:4000 Hz
• Voice Coil Diameter: 52 mm (2.05in)
• Voice Coil Material: Cu
• Voice Coil Former: Glass Fiber
• Voice Coil Depth: 13.6 mm (0.54in)
• Magnetic Gap Depth: 8 mm (0.31in)
• Surround Type: Triple
• Spider Profile: 1x variable height waves
• Chassis Material: Steel
• Magnet Material: Ferrite Ring
• Demodulating Ring: No
• Flux Density: 1.1 T
• Driver Displacement Volume: 2 L (0.071ft^3)

Thiele and small parameters

• Resonance (Fs) - 47 Hz
• DC Resistance (Re) - 3.1 Ohm
• Electrical Q (Qes) - 0.45
• Mechanical Q (Qms) - 13.2
• Total Q (Qts) - 0.44
• Compliance Equivalent Volume (Vas) - 81.4 L
• Diaphragm Area (Sd) - 543 cm²
• Maximum Linear Excursion (Xmax) - 5.47 mm
• Maximum Mechanical Excursion (Xdamage) - 16.7 mm
• Moving Mass - System (Mms) - 58.0 g
• Force Factor (BL) - 10.9 Tm
• Voice Coil Inductance (Le) - 0.55 mH
• Moving Mass - Diaphragm (Mmd) - 43.7 g
• Compliance (Cms) - 0.20 mm/N
• Mechanical Resistance (Rms) - 1.3 Kg/s
• Reference Efficiency (Eta Zero) - 1.83 %
• Efficiency Bandwidth Product (EBP) - 104

Shipping Information

• Net Weight: 3.5 kg (7.7lb)
• Shipping Weight: 4.3 kg (9.5lb)
• Shipping Box: 350 x 346 x 190 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