Key Features
- 8" (203.2mm) Midrange Driver
- 125W @ 8 Ohms
- Sealed Back
- Intended for Cabinet Install
- 20oz Magnet
- 400Hz - 4.8kHz Frequency Response
Description
8" Sealed-Back Midrange Speaker, 8 Ohm, 125 Watt
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.
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
Specifications:
- SPECIFICATION
- Nominal Basket Diameter: 8", 203.2mm
- Nominal Impedance*: 8 ohms
- Power Rating**
- Watts: 125W
- Music Program: 250W
- Resonance: 514Hz
- Usable Frequency Range: 400Hz - 4.8kHz
- Sensitivity***: 100.9dB
- Magnet Weight: 20 oz.
- Gap Height: 0.25", 6.35mm
- Voice Coil Diameter: 1.5", 38.1mm
- THIELE & SMALL PARAMETERS
- Resonant Frequency (fs): 514Hz
- DC Resistance (Re): 7.32
- Coil Inductance (Le): 0.34mH
- Mechanical Q (Qms): 4.48
- Electromagnetic Q (Qes): 2.08
- Total Q (Qts): 1.42
- Compliance Equivalent Volume (Vas): 0.8 liters / 0.03 cu.ft.
- Peak Diaphragm Displacement Volume (Vd): 0cc
- Mechanical Compliance of Suspension (Cms): 0.01mm/N
- BL Product (BL): 8.9 T-M
- Diaphragm Mass Inc. Airload (MMs): 6.9 grams
- Efficiency Bandwidth Product (EBP): 247
- Maximum Linear Excursion (Xmax): 1.6mm
- Surface Area of Cone (Sd): 205.9 cm2
- Maximum Mechanical Limit (Xlim): 3mm
- MOUNTING INFORMATION
- Recommended Enclosure Volume
- Sealed: N/a
- Vented: N/a
- Driver Volume Displaced: 35.3 cu.in. / 0.58 liters
- Overall Diameter: 8.22", 208.8mm
- Baffle Hole Diameter: 7.19", 182.5mm
- Front Sealing Gasket: Fitted as standard
- Rear Sealing Gasket: Fitted as standard
- Mounting Holes Diameter: 0.22", 5.5mm
- Mounting Holes B.C.D.: 7.78", 197.6mm
- Depth: 3.25", 83mm
- Net Weight: 4.4 lbs, 2 kg
- Shipping Weight: 5.1 lbs, 2.3 kgs
- MATERIALS OF CONSTRUCTION
- Coil Construction: Copper voice coil
- Coil Former: Polyimide former
- Magnet Composition: Ferrite magnet
- Core Details: Vented core
- Basket Materials: Pressed steel basket with closed back
- Cone Composition: Paper cone
- Cone Edge Composition: Paper cone edge
- Dust Cap Composition: Solid composition paper dust cap