SPECIFICATION

• Nominal Basket Diameter 12", 304.8mm
• Nominal Impedance* 8 ohms
• Power Rating** Watts 150W Music Program 300W
• Resonance 48Hz
• Usable Frequency Range*** 49Hz-4.5kHz
• Sensitivity 97
• Magnet Weight 4 oz.
• Gap Height 0.28", 7.2mm
• Voice Coil Diameter 2", 50.8mm

THIELE & Small Parameters

• Resonant Frequency (fs) 48Hz
• DC Resistance (Re) 5.1
• Coil Inductance (Le) 0.43mH
• Mechanical Q (Qms) 5.5
• Electromagnetic Q (Qes) 0.53
• Total Q (Qts) 0.48
• Compliance Equivalent Volume (Vas) 91 liters / 3.2 cu. ft.
• Peak Diaphragm Displacement Volume (Vd) 270cc
• Mechanical Compliance of Suspension (Cms) 0.24mm/N
• BL Product (BL) 11.7 T-M
• Diaphragm Mass inc. Airload (Mms) 46 grams
• Efficiency (EBP) Bandwidth Product 91
• Maximum Linear Excursion (Xmax) 5.2mm
• Surface Area of Cone (Sd) 519.5 cm²
• Maximum Mechanical Limit (Xlim) 9.8mm

MOUNTING Information

• Recommended Enclosure Volume 
  Sealed 31-35 liters/ 1.1-1.3 cu.ft. 
  Vented 42.5-85 liters/ 1.5-3 cu.ft.
• Overall Diameter 12.03", 305.5mm
• Baffle Hole Diameter 10.95", 278.1mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket as standard
• Mounting Holes Diameter 0.25", 6.4mm
• Mounting Holes B.C.D. 11.59", 294.3mm
• Depth 5.1", 130mm
• Net Weight 4.1 lbs., 1.9 kg
• Shipping Weight 5.8 lbs., 2.6 kg

MATERIALS of Construction

• Copper voice coil
• Polyimide former
• Neodymium magnet
• Non-vented core
• Pressed steel basket
• Paper Cone
• Cloth cone edge
• Solid composition felt dust cap