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 Diameter: 8"
Power Handling (RMS): 125 Watts
Power Handling (max): 250 Watts
Impedance: 8 ohms
Frequency Response: 400 to 4,800 Hz
Sensitivity: 100.9 dB 1W/1m
Voice Coil Diameter: 1.5"
Magnet Weight: 20 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 Material: Paper
Surround Material: Paper
Voice Coil Wire Material: Copper
Voice Coil Former: Kapton / Polyimide
Basket / Frame Material: Steel
Magnet Material: Ferrite
Mounting Information
Overall Outside Diameter: 8.22"
Baffle Cutout Diameter: 7.19"
Depth: 3.25"
# Mounting Holes: 4
UPC: 876358000029