Eminence ALPHA-8A 8" Professional Mid-Range / Mid-Bass Replacement Speaker 250 Watts

Eminence ALPHA-8A Professional Mid-Range / Mid-Bass Replacement Speaker 250 Watts

Recommended for professional audio mid-range applications in a sealed cabinet, or as a mid-bass in a vented satellite enclosure.

SPECIFICATION

Nominal Basket Diameter

• 8", 203 mm

Nominal Impedance*

• 8 Ω

Power Rating*

Program Power

• 250 W

Watts

• 125 W

Resonance

• 73 Hz

Usable Frequency Range

• 58 Hz - 5 kHz

Sensitivity*

• 94 dB

Magnet Weight

• 20 oz.

Gap Height

• 0.25", 6.4 mm

Voice Coil Diameter

• 1.5", 38 mm

THIELE & SMALL PARAMETERS

Resonant Frequency (fs)

• 73 Hz

DC Resistance (Re)

• 5.3 Ω

Coil Inductance (Le)

• 0.44m H

Mechanical Q (Qms)

• 4.6

Electromagnetic Q (Qes)

• 0.68

Total Q (Qts)

• 0.59

Compliance Equivalent Volume (Vas)

• 17.7 liters / 0.63 cu.ft.

Peak Diaphragm Displacement Volume (Vd)

• 67 cc

Mechanical Compliance of Suspension (Cms)

• 0.28 mm/N

BL Product (BL)

• 7.8 T-M

Diaphragm Mass Inc. Airload (MMs)

• 17 grams

Efficiency Bandwidth Product (EBP)

• 107

Maximum Linear Excursion (Xmax)

• 3.2 mm

Surface Area of Cone (Sd)

• 210 cm2

Maximum Mechanical Limit (Xlim)

• 7.1 mm

MOUNTING INFORMATION

Recommended Enclosure Volume

Sealed

• 5-7 liters / 0.18-0.25 cu.ft.

Vented

• 16.7-25.5 liters / 0.59-0.9 cu.ft.

Driver Volume Displaced

• 0.02 cu.ft. / 0.58 liters

Overall Diameter

• 8.24", 209.3 mm

Baffle Hole Diameter

• 7.13", 181.1 mm

Front Sealing Gasket

• Yes

Rear Sealing Gasket

• Yes

Mounting Holes Diameter

• 0.22", 5.6mm

Mounting Holes B.C.D.

• 7.75", 196.9mm

Depth

• 3.25", 82.6 mm

Net Weight

• 4.3 lbs, 1.95 kg

Shipping Weight

• 5.1 lbs, 2.31 kgs

MATERIALS OF CONSTRUCTION

Coil Construction

• Copper voice coil

Coil Former

• Polyimide former

Magnet Composition

• Ferrite magnet

Core Details

• Vented core

Basket Materials

• Pressed steel basket

Cone Composition

• Paper cone

Cone Edge Composition

• Cloth cone edge

Dust Cap Composition

• Solid composition paper dust cap