Eminence Definimax 4012ULF - 8 ohm 12" 1200W Pro Audio Woofer

Save $111.24
SKU: 555-052

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Sale price$249.00 Regular price$360.24
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Does not come with magnet boot or labelled sticker

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

Speaker Detail
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 0.37", 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 aluminum shorting ring and Core Periphery Ventilation
Basket Materials Die-cast aluminum basket
Cone Composition Water resistant paper cone
Cone Edge Composition Cloth cone edge
Dust Cap Composition Water resistant treated paper dust cap
response graph

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