Eminence Alpha 8MRA 8" Woofer LOW SHIPPING! AUTHORIZED DISTRIBUTOR!!!

ALPHA-8MRA

SPECIFICATION

Nominal Basket Diameter

8", 203.2mm

Nominal Impedance*

8 ohms

Power Rating

Watts

125W

Music Program

250W

Resonance

514Hz

Usable Frequency Range

400Hz-4.8kHz

Sensitivity***

100.9

Magnet Weight

20 oz.

Gap Height

0.25", 6.35mm

Voice Coil Diameter

1.5", 38.1mm

THIELE & SMALL PARAMETERS

Resonant Frequency (fs)

DC Resistance (Re)

7.32

Coil Inductance (Le)

0.34mH

Mechanical Q (Qms)

4.48

Electromagnetic Q (Qes)

2.08

Total Q (Qts)

1.42

Compliance Equivalent Volume (Vas)

0.8 liters / 0.03 cu.ft.

Peak Diaphragm Displacement Volume (Vd)

0cc

Mechanical Compliance of Suspension (Cms)

0.01mm/N

BL Product (BL)

8.9 T-M

Diaphram Mass inc. Airload (Mms)

6.9 grams

Efficiency Bandwidth Product (EBP)

247

Maximum Linear Excursion (Xmax)

1.6mm

Surface Area of Cone (Sd)

205.9 cm2

Maximum Mechanical Limit (Xlim)

3.0mm

MOUNTING INFORMATION

Recommended Enclosure

Sealed

N/A

Vented

N/A

Overall Diameter

8.22", 208.8mm

Baffle Hole Diameter

7.19", 182.5mm

Front Sealing Gasket

Fitted as standard

Rear Sealing Gasket

Fitted as standard

Mounting Holes Diameter

0.22", 5.5mm

Mounting Holes B.C. D.

7.75", 196.9mm

Depth

3.25", 83mm

Net Weight

4.4 lbs., 2 kg

Shipping Weight

5.1 lbs., 2.3 kg

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 with closed back

Cone Composition

Paper Cone

Cone Edge Composition

Paper cone edge

Dustcap Composition

Solid composition paper dust cap