BIG BEN
big ben n. big British tone in a high-power 15" guitar speaker
Coloration : A very big, clean and warm British sound. A somewhat throaty tone with fat bass and smooth highs
Genre : Delta Blues, Texas Blues, Jazz, and Country

Specification
Nominal Basket Diameter 15", 381mm
Nominal Impedance* 8 ohms
Power Rating** 225W
Resonance 85Hz
Usable Frequency Range*** 70Hz-3.5kHz
Sensitivity 101.5
Magnet Weight 56 oz.
Gap Height 0.375", 9.53mm
Voice Coil Diameter 2.5", 63.5mm

Thiele & Small Parameters
Resonant Frequency (fs) 85Hz
DC Resistance (Re) 6.06
Coil Inductance (Le) 0.51mH
Mechanical Q (Qms) 10.63
Electromagnetic Q (Qes) 1.04
Total Q (Qts) 0.94
Compliance Equivalent Volume (Vas) 77.7 liters / 2.74 cu. ft.
Peak Diaphragm Displacement Volume (Vd) 0cc
Mechanical Compliance of Suspension (Cms) 0.08mm/N
BL Product (BL) 12.1 T-M
Diaphragm Mass inc. Airload (Mms) 47 grams
Efficiency (EBP) Bandwidth Product 82
Maximum Linear Excursion (Xmax) 0.0mm
Surface Area of Cone (Sd) 856.3 cm2
Maximum Mechanical Limit (Xlim)

Mounting Information
Recommended Enclosure Volume
Vented Acceptable
Overall Diameter 15.13", 384.2mm
Baffle Hole Diameter 13.8", 350.5mm
Front Sealing Gasket fitted as
Rear Sealing Gasket fitted as
Mounting Holes Diameter 0.25", 6.4mm
Mounting Holes B.C.D. 14.56", 369.9mm
Depth 6.1", 155mm
Net Weight 12.6 lbs., 5.7 kg
Shipping Weight 14.9 lbs., 6.8 kg

Materials of Construction
Copper voice coil
Polyimide former
Ferrite magnet
Non-vented core
Pressed steel basket
Paper Cone
Paper cone edge
Zurette dust cap