SPECIFICATION

• Nominal Basket Diameter 12", 304.8 mm
• Nominal Impedance 4 ohms
• Power Rating Watts 250 W / Music Program 500 W
• Resonance 47 Hz
• Usable Frequency Range 43 Hz - 3.8 kHz
• Sensitivity 98
• Magnet Weight 38 oz.
• Gap Height 0.312", 7.92 mm
• Voice Coil Diameter 2", 50.8 mm

THIELE & Small Parameters

• Resonant Frequency (fs) 45.5 Hz
• DC Resistance (Re) 3.47
• Coil Inductance (Le) 0.75 mH
• Mechanical Q (Qms) 9.57
• Electromagnetic Q (Qes) 0.49
• Total Q (Qts) 0.46
• Compliance Equivalent Volume (Vas) 115.0 liters
• Peak Diaphragm Displacement Volume (Vd) 128.0 cc
• Mechanical Compliance of Suspension (Cms) 0.279 mm/N
• BL Product (BL) 9.46 T-M
• Diaphragm Mass inc. Airload (Mms) 43.9 grams
• Efficiency Bandwidth Product (EBP) 93.4
• Maximum Linear Excursion (Xmax) 2.37 mm
• Surface Area of Cone (Sd) 538.9 cm²
• Maximum Mechanical Limit (Xlim) 11 mm

MOUNTING Information

• Recommended Enclosure Volume  
  Sealed 25.5-35.4 liters, 0.9-1.25 cu.ft.  
  Vented 36.8-139 liters/1.3-4.9 cu.ft.
• Overall Diameter 12.03", 305.5 mm
• Baffle Hole Diameter 10.95", 278.1 mm
• Front Sealing Gasket standard fitted as standard
• Rear Sealing Gasket standard fitted as standard
• Mounting Holes Diameter 0.25", 6.4 mm
• Mounting Holes B.C.D. 11.59", 294.3 mm
• Depth 4.57", 116 mm

MATERIALS of Construction

• Copper voice coil
• Polyimide former
• Ferrite magnet
• Vented and extended core
• Pressed steel basket
• Paper Cone
• Cloth cone edge
• Solid composition paper dust cap