12-in 200W RMS to MAX 800W 2-in Voice Coil Diameter 4 Ohms Impedance Ferrite Magnet
SKU: EM2012
Availability: Out of stock

Nominal Basket Diameter 12", 304.8mm
Nominal Impedance: 4 ohms
Power Rating:
Watts 200W
Peak 800W
Resonance 41.85Hz
Usable Frequency Range 35Hz - 0.3kHz
Sensitivity: 91.3dB
Magnet Weight 38 oz.
Gap Height 0.31-in , 8mm
Voice Coil Diameter 2", 50.8mm
Thiele & Small Parameters
Resonant Frequency (fs) 41.85Hz
DC Resistance (Re) 3.57
Coil Inductance (Le) 1.71mH
Mechanical Q (Qms) 10.04
Electromagnetic Q (Qes) 0.57
Total Q (Qts) 0.54
Compliance Equivalent Volume (Vas) 65.27 liters / 2.3 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 263cc
Mechanical Compliance of Suspension (Cms) 0.17mm/N
BL Product (BL) 11.83 T-M
Diaphragm Mass Inc.
Airload (MMs) 84.37 grams
Efficiency Bandwidth Product (EBP) 74.06
Maximum Linear Excursion (Xmax) 5mm
Surface Area of Cone (Sd) 525.9 cm2
Maximum Mechanical Limit (Xlim) 10mm
Mounting Information
Recommended Enclosure Volume
Sealed 28.32-39.64 liters / 1-1.4 cu.ft.
Vented 36.25-84.95 liters / 1.28-3 cu.ft.
Driver Volume Displaced 122 cu.in.
/ 2 liters
Overall Diameter 12.3-in , 312.42mm
Baffle Hole Diameter 11-in , 279.4mm
Front Sealing Gasket Fitted as standard
Rear Sealing Gasket
Mounting Holes Diameter 0.25-in , 6.35mm
Mounting Holes B.C.D.
11.72", 297.69mm
Depth 5.5-in , 139.7mm
Net Weight 8 lbs, 3.63 kg
Shipping Weight 10.1 lbs, kgs
Materials of Construction
Coil Construction Copper voice coil
Coil Former Polyimide former
Magnet Composition Ferrite magnet
Core Details Vented core

Basket Materials Pressed steel basket
Cone Composition Treated Paper Cone
Cone Edge Composition Foam Edge
Dust Cap Composition Treated paper dust cap