Eminence Kappa-12A - 8 ohm 12" 450W Pro Audio Woofer

SKU: 555-026

Canadian Dollar Price:
Sale price$229.99
In stock (6 units)


Recommended for professional audio as a mid/hi or full range in a vented enclosure.

Manufacturer Spec Sheet

Example Cabinet Designs

Speaker Detail
Nominal Basket Diameter 12", 305 mm
Nominal Impedance* 8 Ω
Power Rating*
Program Power 900 W
Watts 450 W
Resonance 45 Hz
Usable Frequency Range 62 Hz - 4.2 kHz
Sensitivity* 99.3 dB
Magnet Weight 80 oz.
Gap Height 0.37", 9.5 mm
Voice Coil Diameter 3", 76 mm
Thiele & Small Parameters
Resonant Frequency (fs) 45 Hz
DC Resistance (Re) 5.41 Ω
Coil Inductance (Le) 0.77m H
Mechanical Q (Qms) 7.76
Electromagnetic Q (Qes) 0.28
Total Q (Qts) 0.27
Compliance Equivalent Volume (Vas) 112.1 liters / 3.96 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 166 cc
Mechanical Compliance of Suspension (Cms) 0.3 mm/N
BL Product (BL) 15.2 T-M
Diaphragm Mass Inc. Airload (MMs) 42 grams
Efficiency Bandwidth Product (EBP) 161
Maximum Linear Excursion (Xmax) 3.2 mm
Surface Area of Cone (Sd) 519.5 cm2
Maximum Mechanical Limit (Xlim) 11.5 mm
Mounting Information
Recommended Enclosure Volume
Sealed N/a
Vented 34-62 liters / 1.2-2.2 cu.ft.
Driver Volume Displaced 0.09 cu.ft. / 2.55 liters
Overall Diameter 12.26", 311.4 mm
Baffle Hole Diameter 11", 279.4 mm
Front Sealing Gasket Yes
Rear Sealing Gasket Yes
Mounting Holes Diameter 0.25", 6.4mm
Mounting Holes B.C.D. 11.71", 297.4mm
Depth 5.63", 143 mm
Net Weight 14.9 lbs, 6.76 kg
Shipping Weight 17.9 lbs, 8.12 kgs
Materials of Construction
Coil Construction Aluminum voice coil
Coil Former Polyimide former
Magnet Composition Ferrite magnet
Core Details Vented core
Basket Materials Pressed steel basket
Cone Composition Paper cone
Cone Edge Composition Cloth cone edge
Dust Cap Composition Solid composition paper dust cap

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