Eminence ALPHA-8MRA: 8 inch Closed Back Midrange

Price: $64.99 $54.99

Recommended for professional audio and bass guitar applications as a mid-range. Sealed basket makes this woofer independent of enclosure design.
125 watts / 400-4.8kHz / 1.5″ voice coil
8 ohms

SKU: ALPHA-8MRA Categories: , ,



***This speaker incorporates the use of a closed back chassis and does not require a tuned enclosure to enhance performance.

Click Here to Download 8 ohm PDF Spec Sheet


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) 514Hz

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