Eminence ALPHA-12A Specification

American Standard series

ALPHA-12A

Recommended for professional audio

mid-bass applications in a small sealed or

medium vented enclosure.

Specification

Nominal Basket Diameter Nominal Impedance* Power Rating** Watts Music Program Resonance Usable Frequency Range Sensitivity*** Magnet Weight Gap Height Voice Coil Diameter

12.0”, 305 mm

51 Hz – 4.3 kHz

.250”, 6.4 mm

MaterialS of conStruction

Copper voice coil Polyimide former Ferrite magnet Vented and extended core Pressed steel basket Paper cone Cloth cone edge Solid composition felt dust cap

8 Ω

150 W 300 W

49 Hz

95.6 dB 20 oz.

1.5”, 38 mm

tHiele & SMall paraMeterS

Fs Re Le Qms Qes Qts Vas Vd Cms BL Mms EBP Xmax Sd Xlim

4.29 cu.ft., 121.50 liters

49 Hz

6.30 Ω

0.79 mH

6.53

0.88

0.77

125.0 cc

0.32 mm/N

8.50 T-M

33 grams

2.40 mm

519.5 cm2

6.6 mm

freQuencY reSponSe & iMpedance curve

dBSPL

105

100

SPL vs Freq

MountinG inforMation

Recommended Enclosure Volume Sealed

Vented

Driver Volume Displaced Overall Diameter Bafﬂe Hole Diameter Front Sealing Gasket Rear Sealing Gasket Mounting Holes Diameter Mounting Holes B.C.D. Depth Net Weight Shipping Weight

0.063 cu.ft., 1.78 liters

17.00–22.70 liters,

0.60–0.80 cu.ft.

56.60–113.30 liters,

2.00–4.00 cu.ft.

12.26’’, 311.4 mm

11.06’’, 280.9 mm Yes Yes

0.25’’, 6.4 mm

11.71’’, 297.4 mm

4.73”, 120.1 mm

5.30 lbs , 2.40 kg

7.40 lbs , 3.36 kg

Ohm

learn more at eminence.com

20 Hz 50 100 200 500 1K 2K 5K 10K 20K

11: Spliced @ 250.0000 1/6 SPLZ

sMap

From design and manufacturing to the stage or studio. Once you’ve experienced the performance of Eminence, you’ll never accept anything else.

mission statement

footnotes

Eminence is dedicated to providing the best Quality, Value and Service to meet our customers’ needs.

* Please consult www.eminence.com for speciﬁcations of models with alternative

impedances.

** Multiple units exceed published ratings evaluated under EIA 426A speciﬁcation while

tested in a free-air, non-temperature-controlled environment.

*** The average 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 | 2 ft. x 2 ft. bafﬂe is built into the wall with the speaker mounted ﬂush against a steel ring for minimum diffraction | Carver PM-120 ampliﬁer | 2700 cu. ft. chamber with ﬁberglass on all six surfaces (three with custommade wedges).

**** BETA 8CX, 10CX, and 12CX are coaxial speakers with tweeter sold separately. Published

usable frequency response contingent upon use of ASD:1001 HF Driver.

***** Multiple units exceeded published ratings evaluated under EIA-426A or AES speciﬁcation

while mounted on Eminence’s H290, H290S, or H2EA horn in a non-temperaturecontrolled environment.

******The average on axis output across the entire 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 horn front mounted | Carver PM-120 ampliﬁer | 2700 cu.ft. chamber with ﬁberglass on all six surfaces (three with custom-made wedges).

Prices, specifications and product cosmetics are subject to change without notice.

eminence speaker llc

838 Mulberry Pike, Eminence, KY 40019