Recommended for professional audio as a mid-bass or vocal wedge in a sealed enclosure. Also suitable as a
mid-bass or woofer in vented enclosures.

• Nominal Basket Diameter 15", 381 mm
• Nominal Impedance 16 ohms
• Power Rating Watts 400 W / Music Program 800 W
• Resonance 40 Hz
• Usable Frequency Range 48 Hz - 4 kHz
• Sensitivity 100
• Magnet Weight 56 oz.
• Gap Height 0.375", 9.53 mm
• Voice Coil Diameter 2.5", 63.5 mm

• Resonant Frequency (fs) 40 Hz
• DC Resistance (Re) 6.3
• Coil Inductance (Le) 0.64 mH
• Mechanical Q (Qms) 8.05
• Electromagnetic Q (Qes) 0.57
• Total Q (Qts) 0.53
• Compliance Equivalent Volume (Vas) 270.7 liters / 9.56 cu.ft
• Peak Diaphragm Displacement Volume (Vd) 233 cc
• Mechanical Compliance of Suspension (Cms) 0.26 mm/N
• BL Product (BL) 13.2 T-M
• Diaphragm Mass inc. Airload (Mms) 62 grams
• Efficiency Bandwidth Product (EBP) 70
• Maximum Linear Excursion (Xmax) 2.7 mm
• Surface Area of Cone (Sd) 864.6 cm²
• Maximum Mechanical Limit (Xlim) 11.1 mm

• Recommended Enclosure Volume
  Sealed 37-42.5 liters/1.3-1.5 cu.ft.
  Vented 82-161.4 liters/2.9-5.7cu.ft.
• Overall Diameter 15.15", 384.8 mm
• Baffle Hole Diameter 13.77", 349.6 mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket fitted as standard
• Mounting Holes Diameter 0.25", 6.4 mm
• Mounting Holes B.C.D. 14.56", 369.9 mm
• Depth 6.05", 154 mm

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