Recommended for professional audio mid-bass applications in a small sealed or medium vented enclosure.

SPECIFICATION
Nominal Basket Diameter	12", 305 mm
Nominal Impedance*	8 Ω
Power Rating*
Program Power	300 W
Watts	150 W
Resonance	49 Hz
Usable Frequency Range	51 Hz - 4.3 kHz
Sensitivity*	95.6 dB
Magnet Weight	20 oz.
Gap Height	0.25", 6.4 mm
Voice Coil Diameter	1.5", 38 mm
THIELE & SMALL PARAMETERS
Resonant Frequency (fs)	49 Hz
DC Resistance (Re)	6.3 Ω
Coil Inductance (Le)	0.79m H
Mechanical Q (Qms)	6.53
Electromagnetic Q (Qes)	0.88
Total Q (Qts)	0.77
Compliance Equivalent Volume (Vas)	121.5 liters / 4.29 cu.ft.
Peak Diaphragm Displacement Volume (Vd)	125 cc
Mechanical Compliance of Suspension (Cms)	0.32 mm/N
BL Product (BL)	8.5 T-M
Diaphragm Mass Inc. Airload (MMs)	33 grams
Efficiency Bandwidth Product (EBP)	56
Maximum Linear Excursion (Xmax)	2.4 mm
Surface Area of Cone (Sd)	519.5 cm2
Maximum Mechanical Limit (Xlim)	6.6 mm
MOUNTING INFORMATION
Recommended Enclosure Volume
Sealed	17-22.7 liters / 0.6-0.8 cu.ft.
Vented	56.6-113.3 liters / 2-4 cu.ft.
Driver Volume Displaced	0.063 cu.ft. / 1.78 liters
Overall Diameter	12.26", 311.4 mm
Baffle Hole Diameter	11.06", 280.9 mm
Front Sealing Gasket	Yes
Rear Sealing Gasket	Yes
Mounting Holes Diameter	0.25", 6.4mm
Mounting Holes B.C.D.	11.71", 297.4mm
Depth	4.73", 120.1 mm
Net Weight	5.3 lbs, 2.4 kg
Shipping Weight	7.4 lbs, 3.36 kgs
MATERIALS OF CONSTRUCTION
Coil Construction	Copper voice coil
Coil Former	Polyimide former
Magnet Composition	Ferrite magnet
Core Details	Vented and extended core

Basket Materials	Pressed steel basket
Cone Composition	Paper cone
Cone Edge Composition	Cloth cone edge
Dust Cap Composition	Solid composition felt dust cap

Eminence ALPHA-12A 12" Speaker 150 Watts

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