EMINENCE EB12A Beta-12 12” 250 W 8 Ohm SPEAKER

• Nominal Basket Diameter 12", 304.8 mm
• Nominal Impedance 8 ohms
• Power Rating Watts 250 W / Music Program 500 W
• Resonance 47 Hz
• Usable Frequency Range 43 Hz - 3.8 kHz
• Sensitivity 98
• Magnet Weight 38 oz.
• Gap Height 0.312", 7.92 mm
• Voice Coil Diameter 2", 50.8 mm

• Resonant Frequency (fs) 47 Hz
• DC Resistance (Re) 5.0
• Coil Inductance (Le) 0.64 mH
• Mechanical Q (Qms) 6.00
• Electromagnetic Q (Qes) 0.50
• Total Q (Qts) 0.46
• Compliance Equivalent Volume (Vas) 120.1 liters / 4.2 cu. ft.
• Peak Diaphragm Displacement Volume (Vd) 237 cc
• Mechanical Compliance of Suspension (Cms) 0.29 mm/N
• BL Product (BL) 10.8 T-M
• Diaphragm Mass inc. Airload (Mms) 40 grams
• Efficiency Bandwidth Product (EBP) 94
• Maximum Linear Excursion (Xmax) 4.4 mm
• Surface Area of Cone (Sd) 538.9 cm²
• Maximum Mechanical Limit (Xlim) 11 mm

• Recommended Enclosure Volume Sealed 25.5-35.4 liters, 0.9-1.25 cu.ft. Vented 36.8-139 liters/1.3-4.9 cu.ft.
• Overall Diameter 12.03", 305.5 mm
• Baffle Hole Diameter 10.95", 278.1 mm
• Front Sealing Gasket standard fitted as standard
• Rear Sealing Gasket standard fitted as standard
• Mounting Holes Diameter 0.25", 6.4 mm
• Mounting Holes B.C.D. 11.59", 294.3 mm
• Depth 4.57", 116 mm

• Copper voice coil
• Polyimide former
• Ferrite magnet
• Vented and extended core
• Pressed steel basket
• Paper Cone
• Cloth cone edge
• Solid composition paper dust cap

• 98 dB Sensitivity 1 W / 1 m
• 800 W + 150 W + 80 W Power Handling
• Single Point Source providing coherent Wave Front
• Conical 60° waveguide for precise directivity
• Optimal for compact 3-way Systems

Specification
Nominal Diameter 320 (12) mm (in)
Nominal Impedance (1) 8 Ohm
Minimum Impedence 7.5 Ohm
Nominal Power Handling (2) 450 W
Continuous Power Handling (3) 900 W
Sensitivity (1W/1m) (4) 95 dB
Frequency Range 40 - 1000 Hz
Voice Coil Diameter 76 (3) mm (in)
Winding Material Copper
Former Material Glass Fibre
Winding Depth 22 (0.9) mm (in)
Magnetic Gap Depth 10.5 (0.4) mm (in)
Flux Density 1.15 T

Thiele & Small Parameters
Fs 42 Hz
Re 6.1 Ohm
Qes 0.22
Qms 3.8
Qts 0.2
Vas 75 (2.6) dm3 (ft3)
Sd 522 (80.9) cm2 (in2)
Eta Zero 2.4 %
Xmax +/- 7 mm
Xvar +/- 9 mm
Mms 74 g
Bl 23.5 Txm
Le 2 mH

Mounting and Shipping Info
Overall Diameter 316 mm (12.4 in)
Bolt Circle Diameter 296 mm (11.6 in)
Baffle Cutout Diameter 282 mm (11.1 in)
Depth 140 mm (5.5 in)
Flange and Gasket Thickness 16 mm (5/8 in)
Net Weight 7.6 kg (16.7 lb)
Shipping Weight 8.4 kg (18.5 lb)
Shipping Box 340x340x170 mm
(13.4x13.4x6.7 in)
1For different impedances, please ask.
22 hours test made with continuous pink noise signal (6 dB crest factor).
Power calculated on rated minimum impedance.
3Power on Continuous Program is defined as 3 dB greater than the
Nominal rating.
4Applied RMS Voltage is set to 2.83V for 8 ohms Nominal Impedance.