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COMMONWEALTH™ 15
Warm and rich, but also very clean and well defined. Great presence! Very full and smooth. Very little cone break-up, but likes Overdrive.

SPECIFICATION
Nominal Basket Diameter 15", 381mm
Nominal Impedance* 4 ohms
Power Rating
Watts 225W
Music Program
Resonance 52Hz
Usable Frequency Range 50Hz-4kHz
Sensitivity*** 100.8
Magnet Weight 109 oz.
Gap Height 0.29", 7.2mm
Voice Coil Diameter 4", 101.6mm

THIELE & SMALL PARAMETERS
Resonant Frequency (fs) 52Hz
DC Resistance (Re) 3.72
Coil Inductance (Le) 0.22mH
Mechanical Q (Qms) 6.75
Electromagnetic Q (Qes) 0.57
Total Q (Qts) 0.53
Compliance Equivalent Volume (Vas) 163 liters / 5.8 cu.ft.
Mechanical Compliance of Suspension (Cms) 0.15mm/N
BL Product (BL) 11.8 T-M
Diaphram Mass inc. Airload (Mms) 65 grams
Efficiency Bandwidth Product (EBP) 91
Maximum Linear Excursion (Xmax) 0.3mm
Surface Area of Cone (Sd) 889.6 cm2
Maximum Mechanical Limit (Xlim)

MOUNTING INFORMATION
Recommended Enclosure
Sealed Acceptable
Vented Acceptable
Overall Diameter 15.28", 388.0mm
Baffle Hole Diameter 14.06", 357.0mm
Front Sealing Gasket fitted as standard
Rear Sealing Gasket
Mounting Holes Diameter 0.26", 6.5mm
Mounting Holes B.C. D. 14.57", 370.0mm
Depth 6", 152mm
Net Weight 22.6 lbs., 10.3 kg
Shipping Weight 24.8 lbs., 11.3 kg

MATERIALS OF CONSTRUCTION
Coil Construction Aluminum voice coil
Coil Former Polyimide former
Magnet Composition Ferrite magnet
Core Details Vented core
Basket Materials Die-cast aluminum basket
Cone Composition Paper Cone
Cone Edge Composition Cloth cone edge
Dustcap Composition Aluminum dust cap