8 in. Paper/Cloth 20 oz. 100 watts Closed Back Mid

Code: Alpha-8MRA

Price: $54.95

Shipping Weight: 8.00 pounds

Quantity in Basket: None

ALPHA 8

For all bass applications.

Nominal Basket Diameter
Impedance
Power Rating
Resonance
Usable Frequency Range
Sensitivity
Magnet Weight
Gap Height
Voice Coil Diameter

Mounting Information
Overall Diameter
Baffle Hole Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
Mounting Holes B.C.D.
Depth
Shipping Weight

Thiele-Small Parameters
Resonant Frequency (fs)
Impedance (Re)
Coil Inductance (Le)
Electromagnetic Q (Qes)
Mechanical Q (Qms)
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)
Equiv. Resistance of Mechanical
Suspension Loss (Rms)
Efficiency Bandwidth Product (EBP)
Voice Coil Overhang (Xmax)
Surface Area of Cone (Sd)
Impedance at Resonance (Zmax)
Maximum Mechanical Limit (Xmech)

8", 203.2mm
8 ohms
125Wrms
545Hz
500Hz - 5kHz
click here for guide
20oz.
0.25", 6.35mm
1.5", 38.1mm

8.22", 208.8mm
7.19", 182.5mm
fitted as standard
fitted as standard
0.218", 5.5mm
7.75", 196.9mm
3.25", 82mm
5.1lbs., 2.3 kg.

545Hz
7.43 ohms
0.37mH
2.78
8.17
2.07
0.61 liters
0.02 cu. ft.
0cc
0.01mm/N
9.1 T-M
9 grams

3.76N*sec/M
196
0mm
214.1cm²29 ohms
9.40mm

Eminence response curves are measured under the following controlled test 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/baffle
2ft. X 2 ft. baffle is built into the wall with the speaker mounted flush against a steel ring for minimum diffraction
Hafler P1500 Trans-Nova amplifier
2700 cu. ft. chamber with fiberglass on all six surfaces (three with custom-made wedges)

To download spec sheets: Alpha 8MR

Application Notes

Ideal for building into bass enclosures to extend the range of a cabinet, creating an economical two-way system.

The closed-back basket does not need a separate enclosure.
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Materials of Construction

Kapton coil former for increased rigidity and thermal protection
Polyamide-imide coated two-layer, 34ga., copper voice coil for improved power handling and durability.
Ferrite Magnet
Premium pressed steel basket with closed back to enable a two-way system without a separate enclosure for the midrange driver
Paper cone
Paper cone edge
Solid composition paper dust cap

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