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Eminence Alpha-8MRA 8" Sealed Back Midrange

Brand:|Model: Alpha-8MRA|Part # 290-402

The Eminence Alpha-8MRA 8" sealed back speaker is an economical, simple solution to bass guitar cabinets that need extended midrange output. It's also a great mid driver for 3-way PA loudspeaker systems.
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List Price$54.99
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Part # 290-402
  • Kapton coil former
  • Polyamide-imide coated copper voice coil
  • Ferrite magnet
  • Closed- back pressed steel basket
  • Paper cone with treated paper surround
  • Solid composition paper dust cap

Product Details

Eminence Alpha-8MRA 8" Sealed Back Midrange

The sealed back Eminence Alpha-8MRA 8" midrange driver is ideal for building into bass enclosures to extend the midrange performance, creating an economical two-way speaker system. The Alpha-8MRA's closed-back basket does not require a separate enclosure, which makes installation very simple. Extremely high output capability combines with high power handling to create a reliable and useful pro speaker product.

Product Specifications
  • Nominal Diameter8"
  • Power Handling (RMS)125 Watts
  • Power Handling (max)250 Watts
  • Impedance8 ohms
  • Frequency Response400 to 4,800 Hz
  • Sensitivity100.9 dB 1W/1m
  • Voice Coil Diameter1.5"
  • Magnet Weight20 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)514 Hz
  • DC Resistance (Re)7.32 ohms
  • Voice Coil Inductance (Le)0.34 mH
  • Mechanical Q (Qms)4.48
  • Electromagnetic Q (Qes)2.08
  • Total Q (Qts)1.42
  • Compliance Equivalent Volume (Vas)0.03 ft.³
  • Mechanical Compliance of Suspension (Cms)0.01 mm/N
  • BL Product (BL)8.90 Tm
  • Diaphragm Mass Inc. Airload (Mms)7g
  • Maximum Linear Excursion (Xmax)1.6 mm
  • Surface Area of Cone (Sd)205.9 cm²
Materials of Construction
  • Cone MaterialPaper
  • Surround MaterialPaper
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerKapton® / Polyimide
  • Basket / Frame MaterialSteel
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter8.22"
  • Baffle Cutout Diameter7.19"
  • Depth3.25"
  • # Mounting Holes4
Eminence Alpha-8MRA 8" Sealed Back Midrange
  • BrandEminence Speaker
  • ModelAlpha-8MRA
  • Part Number290-402
  • UPC876358000029
  • Product CategoryPro Woofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Product Rating
    (12 Reviews)
  • Weight5.41 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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