SPECIFICATION

• Nominal Basket Diameter 15", 381mm
• Nominal Impedance 4 ohms
• Power Rating Watts 300W Music Program 600W
• Resonance 38Hz
• Usable Frequency Range 52Hz-2.5kHz
• Sensitivity 98 dB
• Magnet Weight 7 oz.
• Gap Height 0.28", 7mm
• Voice Coil Diameter 2.5", 63.5mm

THIELE & Small Parameters

• Resonant Frequency (fs) 38Hz
• DC Resistance (Re) 3.72
• Coil Inductance (Le) 0.39mH
• Mechanical Q (Qms) 4.7
• Electromagnetic Q (Qes) 0.50
• Total Q (Qts) 0.45
• Compliance Equivalent Volume (Vas) 260 liters / 9.2 cu. ft.
• Peak Diaphragm Displacement Volume (Vd) 381cc
• Mechanical Compliance of Suspension (Cms) 0.26mm/N
• BL Product (BL) 11.1 T-M
• Diaphragm Mass inc. Airload (Mms) 70 grams
• Efficiency Bandwidth Product (EBP) 76
• Maximum Linear Excursion (Xmax) 4.5mm
• Surface Area of Cone (Sd) 856 cm²
• Maximum Mechanical Limit (Xlim) 8.5mm

MOUNTING Information

• Recommended Enclosure Volume 
  Sealed 45-82 liters/ 1.6-2.9 cu.ft.  
  Vented 85-119 liters/ 3-4.2 cu.ft.
• Overall Diameter 15.32", 389.1mm
• Baffle Hole Diameter 14.0", 355.6mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket fitted as standard
• Mounting Holes Diameter 0.28", 7.0mm
• Mounting Holes B.C.D. 14.56", 369.9mm
• Depth 6.9", 175mm
• Net Weight 5.7 lbs., 2.6 kg
• Shipping Weight 7.9 lbs., 3.6 kg

MATERIALS of Construction

• Copper voice coil
• Polyimide former
• Neodymium magnet
• Vented core
• Die-cast aluminum basket
• Paper Cone
• Cloth cone edge
• Solid composition paper dust cap