A high-power, ultra-low frequency enhanced version of the popular Definimax 4012HO. Perfect for horn loading, or in micro-sized vented subwoofers for lots of clean punch and deep lows.

SPECIFICATION
Nominal Basket Diameter	12", 305 mm
Nominal Impedance*	8 Ω
Power Rating*
Program Power	2400 W
Watts	1200 W
Resonance	40 Hz
Usable Frequency Range	37 Hz - 0.2 kHz
Sensitivity*	90.7 dB
Magnet Weight	109 oz.
Gap Height	0.375", 9.5 mm
Voice Coil Diameter	4", 102 mm
THIELE & SMALL PARAMETERS
Resonant Frequency (fs)	40 Hz
DC Resistance (Re)	6.2 Ω
Coil Inductance (Le)	4.32m H
Mechanical Q (Qms)	12.13
Electromagnetic Q (Qes)	0.32
Total Q (Qts)	0.31
Compliance Equivalent Volume (Vas)	41.3 liters / 1.46 cu.ft.
Peak Diaphragm Displacement Volume (Vd)	365.4 cc
Mechanical Compliance of Suspension (Cms)	0.1 mm/N
BL Product (BL)	27.38 T-M
Diaphragm Mass Inc. Airload (MMs)	153 grams
Efficiency Bandwidth Product (EBP)	126
Maximum Linear Excursion (Xmax)	6.7 mm
Surface Area of Cone (Sd)	545.4 cm2
Maximum Mechanical Limit (Xlim)	15.5 mm
MOUNTING INFORMATION
Recommended Enclosure Volume
Sealed	N/a
Vented	42.48-113.27 liters / 1.5-4 cu.ft.
Driver Volume Displaced	0.106 cu.ft. / 3 liters
Overall Diameter	12.38", 314.5 mm
Baffle Hole Diameter	11.07", 281.2 mm
Front Sealing Gasket	Yes
Rear Sealing Gasket	Yes
Mounting Holes Diameter	0.27", 6.9mm
Mounting Holes B.C.D.	11.69", 296.9mm
Depth	5.32", 135.1 mm
Net Weight	22.3 lbs, 10.12 kg
Shipping Weight	24.6 lbs, 11.16 kgs
MATERIALS OF CONSTRUCTION
Coil Construction	Copper voice coil
Coil Former	Kapton former
Magnet Composition	Ferrite magnet
Core Details	Undercut with aluminium shorting ring and Core-Periphery Ventilation

Basket Materials	Die-cast aluminium basket
Cone Composition	Water resistant paper cone
Cone Edge Composition	Cloth cone edge
Dust Cap Composition	Water resistant treated paper dust cap

Eminence DEFINIMAX 4012ULF-8 12" 1200 Watt

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