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Eminence - DELTA-12LF 8 Ohm


Low frequency woofer for pro audio mid-bass or floor monitor applications in a sealed enclosure. Also suitable as a woofer in vented, bass guitar or PA enclosures in vented, bass guitar or PA enclosures.

Nominal Basket Diameter 12", 305 mm
Nominal Impedance* 4 or 8 Ω
Power Rating*
Program Power 1000 W
Watts 500 W
Resonance 51 Hz
Usable Frequency Range 44 Hz - 3 kHz
Sensitivity* 94.6 dB
Magnet Weight 56 oz.
Gap Height 0.375", 9.5 mm
Voice Coil Diameter 2.5", 64 mm
Resonant Frequency (fs) 51 Hz
DC Resistance (Re) 3.2 or 6.06 Ω
Coil Inductance (Le) 1.45m H
Mechanical Q (Qms) 7.28
Electromagnetic Q (Qes) 0.51
Total Q (Qts) 0.47
Compliance Equivalent Volume (Vas) 67.9 liters / 2.4 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 243 cc
Mechanical Compliance of Suspension (Cms) 0.19 mm/N
BL Product (BL) 14.1 T-M
Diaphragm Mass Inc. Airload (MMs) 51 grams
Efficiency Bandwidth Product (EBP) 100
Maximum Linear Excursion (Xmax) 4.8 mm
Surface Area of Cone (Sd) 506.7 cm2
Maximum Mechanical Limit (Xlim) 13.5 mm
Recommended Enclosure Volume
Sealed 19.8-28 liters / 0.7-1 cu.ft.
Vented 25.5-102 liters / 0.9-3.6 cu.ft.
Driver Volume Displaced 0.079 cu.ft. / 2.25 liters
Overall Diameter 12.03", 305.6 mm
Baffle Hole Diameter 11.07", 281.2 mm
Front Sealing Gasket Yes
Rear Sealing Gasket Yes
Mounting Holes Diameter 0.25", 6.4mm
Mounting Holes B.C.D. 11.59", 294.4mm
Depth 5.35", 135.9 mm
Net Weight 11.8 lbs, 5.35 kg
Shipping Weight 14 lbs, 6.35 kgs
Coil Construction Copper voice coil
Coil Former Polyimide former
Magnet Composition Ferrite magnet
Core Details Vented and extended core

Basket Materials Pressed steel basket
Cone Composition Paper cone
Cone Edge Composition Cloth cone edge
Dust Cap Composition Solid composition paper dust cap