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.

Specification:

• 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