Eminence Alpha-8MRA American Standard Series 8" Midrange Sealed Back Speaker
or
Buy from our Reverb Shop
(While we are working on our eCommerce shop, you can buy this in our Reverb shop at the link above)
Lightly used, in good working condition. Speaker has a small dent in the paper cone (see photo), but it's in excellent shape overall and works as it should.
From Eminence:
Recommended for pro audio and bass guitar applications as a midrange. Sealed basket makes this woofer independent of enclosure design.
SPECS:
• Nominal Basket Diameter: 8", 203 mm
• Nominal Impedance*: 8 Ω
• Power Rating*:
• Program Power: 250 W
• Watts: 125 W
• Resonance: 514 Hz
• Usable Frequency Range: 400 Hz - 4.8 kHz
• Sensitivity*: 100.9 dB
• Magnet Weight: 20 oz.
• Gap Height: 0.25", 6.4 mm
• Voice Coil Diameter: 1.5", 38 mm
THIELE & SMALL PARAMETERS:
• Resonant Frequency (fs): 514 Hz
• DC Resistance (Re): 7.32 Ω
• Coil Inductance (Le): 0.34m H
• 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): 0 cc
• Mechanical Compliance of Suspension (Cms): 0.01 mm/N
• BL Product (BL): 8.9 T-M
• Diaphragm Mass Inc. Airload (MMs): 7 grams
• Efficiency Bandwidth Product (EBP): 247
• Maximum Linear Excursion (Xmax): 1.6 mm
• Surface Area of Cone (Sd): 205.9 cm2
• Maximum Mechanical Limit (Xlim): 3 mm
MOUNTING INFORMATION:
• Recommended Enclosure Volume:
• Sealed: N/a
• Vented: - liters / - cu.ft.
• Driver Volume Displaced: 0.02 cu.ft. / 0.58 liters
• Overall Diameter: 8.22", 208.8 mm
• Baffle Hole Diameter: 7.19", 182.6 mm
• Front Sealing Gasket: Yes
• Rear Sealing Gasket: Yes
• Mounting Holes Diameter: 0.22", 5.6mm
• Mounting Holes B.C.D.: 7.78", 197.6mm
• Depth: 3.25", 82.6 mm
• Net Weight: 4.4 lbs, 2 kg
• Shipping Weight: 5.1 lbs, 2.31 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
* If you are placing an international order, please contact us prior to checkout to discuss shipping quotes.
