Description
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ALPHA-8MRA
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SPECIFICATION
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Nominal Basket Diameter
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8", 203.2mm
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Nominal Impedance*
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8 ohms
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Power Rating
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Watts
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125W
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Music Program
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250W
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Resonance
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514Hz
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Usable Frequency Range
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400Hz-4.8kHz
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Sensitivity***
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100.9
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Magnet Weight
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20 oz.
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Gap Height
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0.25", 6.35mm
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Voice Coil Diameter
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1.5", 38.1mm
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THIELE & SMALL PARAMETERS
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Resonant Frequency (fs)
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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
Payment & Security
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