Eminence Alpha-8MRA 8" Sealed Back Midrange

Brand:| Model: Alpha-8MRA
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.
  • 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
Part # 
Weight: 5.41 lbs.  
Your Price
Part # 290-402
Qty:  EA
Available Payment Methods

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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Eminence Alpha-8MRA 8" Sealed Back Midrange
Eminence Alpha-8MRA 8" Sealed Back Midrange is rated 4.6667 out of 5 by 12.
Rated 5 out of 5 by from car audiovery good speakers i have a cutlass with six in each door and six in my dash and four in the back deck but you should get a tweeter for each pair
Date published: 2011-01-11
Rated 5 out of 5 by from Excellent replacement for mid in dbx Soundefield VReplaced midrange 8" drivers in dbx Soundfield V speakers (I am the original owner). the surrounds were completely rotted out after 20+ years. This driver was much more accurate---very natural sounding. Very clean. Did not upset the balance with the top-mountd ambiance drivers of this "Soundfield" speaker. Much larger magnets, much heavier than the "cheap" midrange drivers they replaced. All dbx Soundfield Vs would benefit from this upgrade---they sound even better than they did even new.
Date published: 2011-01-09
Rated 4 out of 5 by from Really good speakersits a really good speaker. with good tuning they loud and clear!! good buy!!!
Date published: 2010-02-01
Rated 4 out of 5 by from In Car doorsI have one in each door; they sound clear but lacks midbass, it's more for vocals and high-mids. Overal they are great for the money but you will not get a low mids or mid bass from them... 125RMS on each.
Date published: 2009-08-20
Rated 4 out of 5 by from Fine quality productHad to replace my mid-range drivers in a 18 year old set of DBX Soundfield V speakers.Being enclosed back construction, The Eminence 8"were the only choice.Goog quality, good sound and made in USA!
Date published: 2009-02-09
Rated 5 out of 5 by from Clean, Clear, and PowerfulI have 12 n my car and they sound awesome. I got 125 watts on each one and they dont get hot and play clear and clean all nite long.
Date published: 2009-02-04
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Eminence Alpha-8MRA 8" Sealed Back Midrange

Would these sound ok in an in-ceiling mounted enclosure for church service overflow? Mostly spoken voice but some singing or video playback. Want it because of it's efficiency (limited to existing 25W digital amp).

Asked by: CollinO
This will have plenty of output but also very limited frequency response, which could make it hard to understand what is being said. i would recommend something like the Quam below which is less sensitive but better suited for that type of application.http://www.parts-express.com/quam-8c5pax-8-speaker-8-ohm--244-3210
Answered by: MattP
Date published: 2015-03-19
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