Eminence - The Art and Science of Sound

DELTA PRO-12A

SPECIFICATION

Nominal Basket Diameter

12", 304.8mm

Nominal Impedance*

8 ohms

Power Rating

Watts

400W

Music Program

800W

Resonance

51Hz

Usable Frequency Range

52Hz-4.5kHz

Sensitivity***

99.2

Magnet Weight

80 oz.

Gap Height

0.375", 9.53mm

Voice Coil Diameter

2.5", 63.5mm

THIELE & SMALL PARAMETERS

Resonant Frequency (fs)

51Hz

Download PDF Spec Sheet

Download PDF Cabinet Design

DC Resistance (Re)

5.71

Coil Inductance (Le)

0.84mH

Mechanical Q (Qms)

7.56

Electromagnetic Q (Qes)

0.37

Total Q (Qts)

0.35

Compliance Equivalent Volume (Vas)

81.7 liters / 2.9 cu.ft.

Peak Diaphragm Displacement Volume (Vd)

242cc

Mechanical Compliance of Suspension (Cms)

0.21mm/N

BL Product (BL)

15.3 T-M

Diaphram Mass inc. Airload (Mms)

48 grams

Efficiency Bandwidth Product (EBP)

138

Maximum Linear Excursion (Xmax)

4.6mm

Surface Area of Cone (Sd)

532.4 cm2

Maximum Mechanical Limit (Xlim)

13.7mm

MOUNTING INFORMATION

Recommended Enclosure

Sealed

28-35 liters/1-1.25 cu.ft.

Vented

31-91 liters/1.1-3.2 cu.ft.

Overall Diameter

12.38", 314.5mm

Baffle Hole Diameter

11.07", 281mm

Front Sealing Gasket

Fitted as standard

Rear Sealing Gasket

Fitted as standard

Mounting Holes Diameter

0.27", 6.9mm

Mounting Holes B.C. D.

11.57", 293.8mm

Depth

6.22", 158mm

Net Weight

16.3 lbs., 7.4 kg

Shipping Weight

18 lbs., 8.2 kg

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

Dustcap Composition

Solid composition paper dust cap

FOOTNOTES

*	Please consult www.eminence.com for specifications of models with alternative impedances.
**	Multiple units exceed published rating evaluated under EIA 426A noise source and test standard while in a free-air, non-temperature controlled environment.
***	The average on axis output across the usable frequency range when applying 1W/1m into the nominal impedance, i.e. 2.83V/8Ω, 4V/16Ω. Eminence response curves are measured under the following conditions: All speakers are tested at 1W/1m using a variety of test set-ups for the appropriate impedance \| LMS using 0.25" supplied microphone (software calibrated) mounted 1m from wall/baffle \| 2ft x 2ft baffle is built into the wall with speaker mounted flush against a steel ring for minimum diffraction \| Carver PM-120 amplifier \| 2700ft3 chamber with fiberglass on all six surfaces (three with custom-made wedges).
****	BETA 8CX, 10CX, 12CX and Acoustinator™ CX2008 are coaxial speakers with tweeter sold separately. Published Usable frequency response obtained with APT50 high frequency driver attached.