4x Eminence Beta-12A-2 12" 500W 8-Ohms PA Replacement Bass Guitar Speaker Woofer

SPECIFICATION

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