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COMMONWEALTH™ 12
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 12", 304.8mm
Nominal Impedance* 8 ohms
Power Rating
Watts 225W
Music Program N/A
Resonance 50Hz
Usable Frequency Range 50Hz-4kHz
Sensitivity*** 100
Magnet Weight 109 oz.
Gap Height 0.29", 7.2mm
Voice Coil Diameter 4", 101.6mm

THIELE & SMALL PARAMETERS
Resonant Frequency (fs) 50Hz
DC Resistance (Re) 6.34
Coil Inductance (Le) 0.46mH
Mechanical Q (Qms) 6.61
Electromagnetic Q (Qes) 0.35
Total Q (Qts) 0.33
Compliance Equivalent Volume (Vas) 90 liters / 3.2 cu.ft.
Mechanical Compliance of Suspension (Cms) 0.24mm/N
BL Product (BL) 15.7 T-M
Diaphram Mass inc. Airload (Mms) 43 grams
Efficiency Bandwidth Product (EBP) 143
Maximum Linear Excursion (Xmax) 0.7mm
Surface Area of Cone (Sd) 519.5 cm2
Maximum Mechanical Limit (Xlim) N/A

MOUNTING INFORMATION
Recommended Enclosure
Sealed Acceptable
Vented Acceptable
Overall Diameter 12.28", 312.0mm
Baffle Hole Diameter 11.08", 281.3mm
Front Sealing Gasket Fitted as standard
Rear Sealing Gasket N/A
Mounting Holes Diameter 0.27", 6.8mm
Mounting Holes B.C. D. 11.69", 297.0mm
Depth 5", 127mm
Net Weight 21.5 lbs., 9.8 kg
Shipping Weight 23.2 lbs., 10.5 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