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Eminence Alpha 8MR 125W 8" Mid-range driver 8 ohm
Recommended for professional audio and bass guitar applications as a mid-range. Sealed basket makes this woofer independent of enclosure design.
- 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*** 100.9dB
- 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
- Diaphragm 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) 3mm
Mounting Information:
- Recommended Enclosure Volume: Sealed N/a, Vented N/a
- Driver Volume Displaced 35.3 cu.in. / 0.58 liters
- 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 kgs
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
- Dust Cap Composition Solid composition paper dust cap
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Eminence Alpha 8MRA - 8" 125W 8 Ohm PDF data sheet (295 kb)
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