Eminence ALPHA-8A 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)

8”, 203.2mm

8 ohms

125W 250W

73Hz

58Hz-5kHz

20 oz

0.25”, 6.35mm

1.5”, 38.1mm

73Hz

5.3

0.44mH

4.6

0.68

0.59

17.7 ltr/0.6 cu. ft. 67cc

0.28mm/N

7.8 T-M

17 grams

107

3.2mm

210.0cm

7.1mm

The Art and Science of Sound

ALPHA-8A American Standard Series

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

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

16.7-25.5 ltr/0.59-0.90 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

5-7 ltr/0.18-0.25 cu. ft.

8.24”, 209.2mm

7.13”, 181mm

Fitted as Standard Fitted as Standard

0.22”, 5.5mm

7.75”, 196.9mm

3.25”, 83mm

4.3 lbs, 1.9 kg

5.1 lbs, 2.3 kg

Copper

Polyimide

Ferrite

Vented

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)