Eminence DELTA-12LFA User Manual

Specication

Nominal Basket Diameter
Nominal Impedance*
Power Rating**
Watts
Music Program

Resonance

Usable Frequency Range***
Sensitivity
Magnet Weight
Gap Height
Voice Coil Diameter

Thiele & Small Parameters

Resonant Frequency (fs)
DC Resistance (Re)
Coil Inductance (Le)
Mechanical Q (Qms)
Electromagnetic Q (Qes)
Total Q (Qts)
Compliance Equivalent Volume (Vas)
Peak Diaphragm Displacement Volume (Vd)
Mechanical Compliance of Suspension (Cms)
BL Product (BL)
Diaphragm Mass inc. Airload (Mms)
Efciency Bandwidth Product (EBP)
Maximum Linear Excursion (Xmax)
Surface Area of Cone (Sd)
Maximum Mechanical Limit (Xlim)

12”, 304.8mm

8 ohms

500W

1000W

51Hz

44Hz-3kHz

94.6

56 oz

0.375”, 9.53mm

2.5”, 63.5mm

51Hz

6.06

1.45mH

7.28

0.51

0.47

67.9 ltr/2.4 cu. ft.
243cc

0.19mm/N

14.1 T-M

51 grams

100

4.8mm

506.7cm

13.5mm

The Art and Science of Sound

DELTA-12LFA American Standard Series

Recommended for professional audio mid-bass or oor monitor applications in a sealed enclosure.
Also suitable as a woofer in vented, bass guitar or PA enclosures.

2

Mounting Information

Recommended Enclosure Volume
Sealed
Vented
Overall Diameter
Bafe Hole Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
Mounting Holes B.C.D.
Depth
Net Weight
Shipping Weight

25.5-102 ltr/0.9-3.6 cu. ft.

Materials of Construction

Coil Construction
Coil
Magnet Composition
Core Details
Basket Materials
Cone Composition
Cone Edge Composition
Dust Cap Composition

Solid Composition Paper

19.8-28 ltr/0.7-1.0 cu. ft.

12.03”, 305.5mm

10.95”, 278.1mm
Fitted as Standard
Fitted as Standard

0.25”, 6.4mm

11.59”, 294.3mm

5.35”, 136mm

11.8 lbs, 5.4 kg
14 lbs, 6.4 kg

Copper

Polyimide

Ferrite

Vented And Extended

Pressed Steel

Paper

Cloth

Please inquire about alternative impedances.

*

Multiple units exceed published rating evaluated under EIA 426A noise source and test standard while in a free-air, nontemperature-controlled environment.

**

The average output across the usable frequency range when applying 1W/1m into the nominal impedance. Ie: 2.83 V/8 ohms, 4 V/16 ohms.

***

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/bafe | 2 ft. X 2 ft. bafe is built into the wall with the speaker mounted ush against a steel ring for minimum diffraction | Haer P1500 Trans-Nova amplier | 2700 cu.ft. chamber with

berglass on all six surfaces (three with custom-made wedges)