Eminence DELTA-12A

Recommended for professional audio as a mid-bass or woofer (with high-pass filter) in vented enclosures.

Specification Nominal Basket Diameter

• 12", 305 mm

Nominal Impedance*

• 8 Ohm
  

Power Rating Watts

• 400 W

Music Program

• 800 W

Resonance

• 55 Hz

Usable Frequency Range

• 54 Hz - 5 kHz

Sensitivity***

• 98.3 dB

Magnet Weight

• 56 oz.

Gap Height

• 0.375", 9.5 mm

Voice Coil Diameter

• 2.5", 64 mm

Thiele & Small Parameters Resonant Frequency (fs)

• 55 Hz

DC Resistance (Re)

• 6.3 ?

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

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 felt dust cap