Eminence BETA-12A 12" American Standard Series Woofer Bass Speaker

Overview

Recommended for professional audio and bass guitar applications as a woofer in a vented enclosure. Also works well for PA in a sealed or bandpass enclosure.

Specifications

Nominal Basket Diameter

12", 305 mm

Nominal Impedance*

8 Ω

Power Rating*

Program Power

500 W

Watts

250 W

Resonance

47 Hz

Usable Frequency Range

43 Hz - 3.8 kHz

Sensitivity*

98 dB

Magnet Weight

38 oz.

Gap Height

0.312", 7.9 mm

Voice Coil Diameter

2", 51 mm

THIELE & SMALL PARAMETERS

Resonant Frequency (fs)

47 Hz

DC Resistance (Re)

5 Ω

Coil Inductance (Le)

0.64m H

Mechanical Q (Qms)

6

Electromagnetic Q (Qes)

0.5

Total Q (Qts)

0.46

Compliance Equivalent Volume (Vas)

120.1 liters / 4.24 cu.ft.

Peak Diaphragm Displacement Volume (Vd)

237 cc

Mechanical Compliance of Suspension (Cms)

0.29 mm/N

BL Product (BL)

10.8 T-M

Diaphragm Mass Inc. Airload (MMs)

40 grams

Efficiency Bandwidth Product (EBP)

94

Maximum Linear Excursion (Xmax)

4.4 mm

Surface Area of Cone (Sd)

538.9 cm2

Maximum Mechanical Limit (Xlim)

11 mm

MOUNTING INFORMATION

Recommended Enclosure Volume

Sealed

25.5-35.4 liters / 0.9-1.25 cu.ft.

Vented

36.8-139 liters / 1.3-4.9 cu.ft.

Driver Volume Displaced

0.071 cu.ft. / 2 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

5.5", 139.7 mm

Net Weight

7.5 lbs, 3.4 kg

Shipping Weight

9.7 lbs, 4.4 kgs

MATERIALS OF CONSTRUCTION

Coil Construction

Copper voice coil

Coil Former

Polyimide former

Magnet Composition

Ferrite magnet

Core Details

Vented and extended core

Basket Materials

Pressed steel basket

Cone Composition

Paper cone

Cone Edge Composition

Cloth cone edge

Dust Cap Composition

Solid composition paper dust cap

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