Speaker - Eminence® American, 12", Delta 12A, 400W

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Speaker - Eminence® American, 12", Delta 12A, 400W

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American Standard Series 12" speaker, 8 ohm. Recommended for professional audio as a mid-bass or woofer (with high-pass filter) in vented enclosures.

Nominal Basket Diameter 12", 305 mm
Nominal Impedance* 8 Ω
Power Rating*
Program Power 800 W
Watts 400 W
Resonance 55 Hz
Usable Frequency Range 54 Hz - 5 kHz
Sensitivity* 98.3 dB
Magnet Weight 56 oz.
Gap Height 0.37", 9.5 mm
Voice Coil Diameter 2.5", 64 mm
Resonant Frequency (fs) 55 Hz
DC Resistance (Re) 6.3 Ω
Coil Inductance (Le) 0.74m H
Mechanical Q (Qms) 5.27
Electromagnetic Q (Qes) 0.46
Total Q (Qts) 0.43
Compliance Equivalent Volume (Vas) 81.3 liters / 2.87 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 125 cc
Mechanical Compliance of Suspension (Cms) 0.21 mm/N
BL Product (BL) 13.5 T-M
Diaphragm Mass Inc. Airload (MMs) 39 grams
Efficiency Bandwidth Product (EBP) 120
Maximum Linear Excursion (Xmax) 2.4 mm
Surface Area of Cone (Sd) 519.5 cm2
Maximum Mechanical Limit (Xlim) 9.9 mm
Recommended Enclosure Volume
Sealed N/a
Vented 25.5-85 liters / 0.9-3 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 11.4 lbs, 5.17 kg
Shipping Weight 13.5 lbs, 6.12 kgs
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 felt dust cap
RoHS Compliant
Item ID:
American Standard
Product Measurements
Baffle Hole Diameter11.07", 281.2 mm
Basket MaterialsPressed steel basket
Bl Product (bl)13.5 T-M
Coil ConstructionAluminum voice coil
Coil FormerPolyimide former
Coil Inductance (le)0.74m H
Compliance Equivalent Volume (vas)81.3 liters / 2.87 cu.ft.
Cone CompositionPaper cone
Cone Edge CompositionCloth cone edge
Core DetailsVented core
Dc Resistance (re)6.3 Ω
Depth5.35", 135.9 mm
Diameter12 in.
Diaphragm Mass Inc. Airload (mms)39 grams
Driver Volume Displaced0.079 cu.ft. / 2.25 liters
Dust Cap CompositionSolid composition felt dust cap
Efficiency Bandwidth Product (ebp)120
Electromagnetic Q (qes)0.46
Front Sealing GasketYes
Gap Height0.37", 9.5 mm
Magnet CompositionFerrite magnet
Magnet Weight56 oz.
Maximum Linear Excursion (xmax)2.4 mm
Maximum Mechanical Limit (xlim)9.9 mm
Mechanical Compliance Of Suspension (cms)0.21 mm/N
Mechanical Q (qms)5.27
Mounting Holes B.c.d.11.59", 294.4mm
Mounting Holes Diameter0.25", 6.4mm
Net Weight11.4 lbs, 5.17 kg
Nominal Basket Diameter12", 305 mm
Nominal Impedance*8 Ω
Overall Diameter12.03", 305.6 mm
Peak Diaphragm Displacement Volume (vd)125 cc
Program Power800 W
Rear Sealing GasketYes
Resonance55 Hz
Resonant Frequency (fs)55 Hz
Sensitivity*98.3 dB
Surface Area Of Cone (sd)519.5 cm2
Total Q (qts)0.43
Usable Frequency Range54 Hz - 5 kHz
Vented25.5-85 liters / 0.9-3 cu.ft.
Voice Coil Diameter2.5", 64 mm
Watts400 W
Packaging Information
Packaging Dimensions17.875 in. × 16.625 in. × 6.375 in.
Weight (Packaging)13.5 lbs.

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