Description
8" Midrange/Mid-Bass Driver, 8 Ohm, 225 Watt
The Eminence Beta-8A 8" Midrange/PA Driver's performance is optimized for midrange use between 400 Hz and 4 kHz in multiway systems. The Beta-8A is also suitable for vocal PA, keyboards, stage monitors, and bass guitar.
Features:
- Kapton coil former
- Polyamide-imide coated copper voice coil
- Ferrite magnet
- Pressed steel basket
- Paper cone
- Cloth accordian surround
- Solid composition paper dust cap
Specifications:
- SPECIFICATION
- Nominal Basket Diameter: 8", 203.2mm
- Nominal Impedance*: 8 ohms
- Power Rating**
- Watts: 225W
- Music Program: 450W
- Resonance: 65Hz
- Usable Frequency Range: 78Hz - 4.5kHz
- Sensitivity***: 95.1dB
- Magnet Weight: 34 oz.
- Gap Height: 0.31", 7.92mm
- Voice Coil Diameter: 2", 50.8mm
- THIELE & SMALL PARAMETERS
- Resonant Frequency (fs): 65Hz
- DC Resistance (Re): 5.99
- Coil Inductance (Le): 0.49mH
- Mechanical Q (Qms): 4.95
- Electromagnetic Q (Qes): 0.42
- Total Q (Qts): 0.38
- Compliance Equivalent Volume (Vas): 23.3 liters / 0.82 cu.ft.
- Peak Diaphragm Displacement Volume (Vd): 63cc
- Mechanical Compliance of Suspension (Cms): 0.37mm/N
- BL Product (BL): 9.6 T-M
- Diaphragm Mass Inc. Airload (MMs): 15.8 grams
- Efficiency Bandwidth Product (EBP): 156
- Maximum Linear Excursion (Xmax): 3mm
- Surface Area of Cone (Sd): 210 cm2
- Maximum Mechanical Limit (Xlim): 7.4mm
- MOUNTING INFORMATION
- Recommended Enclosure Volume
- Sealed: 5.7-9.9 liters / 0.2-0.35 cu.ft.
- Vented: 8.5-19 liters / 0.3-0.67 cu.ft.
- Driver Volume Displaced: 46.3 cu.in. / 0.76 liters
- Overall Diameter: 8.24", 209.2mm
- Baffle Hole Diameter: 7.13", 181mm
- Front Sealing Gasket: Fitted as standard
- Rear Sealing Gasket: Fitted as standard
- Mounting Holes Diameter: 0.22", 5.5mm
- Mounting Holes B.C.D.: 7.75", 196.9mm
- Depth: 3.5", 89mm
- Net Weight: 6.6 lbs, 3 kg
- Shipping Weight: 7.4 lbs, 3.4 kgs
- MATERIALS OF CONSTRUCTION
- Coil Construction: Aluminum voice coil
- Coil Former: Polyimide former
- Magnet Composition: Ferrite magnet
- Core Details: Vented core
- Basket Materials: Pressed steel basket
- Cone Composition: Paper cone
- Cone Edge Composition: Cloth cone edge
- Dust Cap Composition: Solid composition paper dust cap