The Eminence Delta Pro-12A 12" cast frame speaker is recommended for professional audio in sealed, vented, and horn-loaded enclosures. Ideal for full-range, mid/hi, and monitor wedges. Extremely efficient through the midrange, but with a surprisingly strong bass kick as well.

Specification
Nominal Basket Diameter    12", 305 mm
Nominal Impedance*    8 Ω
Power Rating**
Watts    400 W
Music Program    800 W
Resonance    51 Hz
Usable Frequency Range    52 Hz - 4.5 kHz
Sensitivity***    99.2 dB
Magnet Weight    80 oz.
Gap Height    0.375", 9.5 mm
Voice Coil Diameter    2.5", 64 mm

Thiele & Small Parameters
Resonant Frequency (fs)    51 Hz
DC Resistance (Re)    5.71 Ω
Coil Inductance (Le)    0.84m H
Mechanical Q (Qms)    7.56
Electromagnetic Q (Qes)    0.37
Total Q (Qts)    0.35
Compliance Equivalent Volume (Vas)    81.7 liters / 2.89 cu.ft.
Peak Diaphragm Displacement Volume (Vd)    242 cc
Mechanical Compliance of Suspension (Cms)    0.21 mm/N
BL Product (BL)    15.3 T-M
Diaphragm Mass Inc. Airload (MMs)    48 grams
Efficiency Bandwidth Product (EBP)    138
Maximum Linear Excursion (Xmax)    4.6 mm
Surface Area of Cone (Sd)    532.4 cm2
Maximum Mechanical Limit (Xlim)    13.7 mm

Mounting Information
Recommended Enclosure Volume
Sealed    28.00-35.00 liters / 1.00-1.25 cu.ft.
Vented    31.00-91.00 liters / 1.10-3.20 cu.ft.
Driver Volume Displaced    0.09 cu.ft. / 2.55 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    6.22", 158 mm
Net Weight    16.3 lbs, 7.39 kg
Shipping Weight    18 lbs, 8.16 kgs

Materials of Construction
Coil Construction    Aluminum voice coil
Coil Former    Polyimide former
Magnet Composition    Ferrite magnet
Core Details    Vented and extended core

    
Basket Materials    Die-cast aluminum basket
Cone Composition    Paper cone
Cone Edge Composition    Cloth cone edge
Dust Cap Composition    Solid composition paper dust cap