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.
Kapton coil former
Polyamide-imide coated copper voice coil
Closed- back pressed steel basket
Paper cone with treated paper surround
Solid composition paper dust cap
Power Handling (RMS)125 Watts
Power Handling (max)250 Watts
Frequency Response400 to 4,800 Hz
Sensitivity100.9 dB 1W/1m
Voice Coil Diameter1.5"
Magnet Weight20 oz.
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