Eminence ALPHA-8MRA User Manual
Specication
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)
Efciency Bandwidth Product (EBP)
Maximum Linear Excursion (Xmax)
Surface Area of Cone (Sd)
Maximum Mechanical Limit (Xlim)
8”, 203.2mm
8 ohms
125W
250W
514Hz
400Hz-4.8kHz
100.9
20 oz
0.25”, 6.35mm
1.5”, 38.1mm
514Hz
7.32
0.34mH
4.48
2.08
1.42
0.8 ltr/0.03 cu. ft.
0cc
0.01mm/N
8.9 T-M
6.9 grams
247
1.6mm
205.9cm
3.0mm
The Art and Science of Sound
ALPHA-8MRA American Standard Series
Recommended for professional audio and bass guitar applications as a mid-range. Sealed basket makes this
woofer independent of enclosure design.
2
Mounting Information
Recommended Enclosure Volume
Sealed
Vented
Overall Diameter
Bafe Hole Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
Mounting Holes B.C.D.
Depth
Net Weight
Shipping Weight
Materials of Construction
Coil Construction
Coil
Magnet Composition
Core Details
Basket Materials
Cone Composition
Cone Edge Composition
Dust Cap Composition
Pressed Steel With Closed Back
Solid Composition Paper
N/A
N/A
8.22”, 208.8mm
7.19”, 182.5mm
Fitted as Standard
Fitted as Standard
0.22”, 5.5mm
7.75”, 196.9mm
3.25”, 83mm
4.4 lbs, 2 kg
5.1 lbs, 2.3 kg
Copper
Polyimide
Ferrite
Vented
Paper
Paper
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/bafe | 2 ft. X 2 ft. bafe is built into the wall with the speaker mounted ush against a steel ring for minimum diffraction | Haer P1500 Trans-Nova amplier | 2700 cu.ft. chamber with
berglass on all six surfaces (three with custom-made wedges)
Loading...