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Eminence Alpha-8MRA 8" Sealed Back Midrange

Eminence SpeakerPart # 290-402
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.

Key Features

  • 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
Your Price: $109.99
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MSRP: $139.99
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Overview

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 Details

BrandEminence Speaker
ModelAlpha-8MRA
Part Number290-402
UPC876358000029
Unit of MeasureEach
Weight5.41

Product Specifications

Nominal Diameter8"
Power Handling (RMS)125 Watts
Power Handling (MAX)250 Watts
Impedance8Ω
Frequency Response400 to 4,800Hz
Sensitivity100.9dB 2.83V/1m
Voice Coil Diameter1.5"

Thiele-Small Parameters

Resonant Frequency (Fs)514Hz
DC Resistance (Re)7.32Ω
Voice Coil Inductance (Le)0.34mH
Mechanical Q (Qms)4.48
Electromagnetic Q (Qes)2.08
Total Q (Qts)1.42
Compliance Equivalent Volume (Vas)0.03ft³
Mechanical Compliance of Suspension (Cms)0.01mm/N
BL Product (BL)8.9T·m
Diaphragm Mass Inc. Airload (Mms)7g
Maximum Linear Excursion (Xmax)1.6mm
Surface Area of Cone (Sd)205.9cm²

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

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.0209ft³
Sealed F3544.4Hz
Vented Volume0.353ft³
Vented F3333Hz

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