BETA-12A 12" American Standard Series Speaker

Recommended for professional audio and bass guitar applications as a woofer in a vented enclosure. Also works well for PA in a sealed or bandpass enclosure.

SPECIFICATION
Nominal Basket Diameter	12", 305 mm
Nominal Impedance*	8 Ω
Power Rating*
Program Power	500 W
Watts	250 W
Resonance	47 Hz
Usable Frequency Range	43 Hz - 3.8 kHz
Sensitivity*	98 dB
Magnet Weight	38 oz.
Gap Height	0.312", 7.9 mm
Voice Coil Diameter	2", 51 mm
THIELE & SMALL PARAMETERS
Resonant Frequency (fs)	47 Hz
DC Resistance (Re)	5 Ω
Coil Inductance (Le)	0.64m H
Mechanical Q (Qms)	6
Electromagnetic Q (Qes)	0.5
Total Q (Qts)	0.46
Compliance Equivalent Volume (Vas)	120.1 liters / 4.24 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
MOUNTING INFORMATION
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.
Driver Volume Displaced	0.071 cu.ft. / 2 liters
Overall Diameter	12.03", 305.6 mm
Baffle Hole Diameter	11.07", 281.2 mm
Front Sealing Gasket	Yes
Rear Sealing Gasket	Yes
Mounting Holes Diameter	0.25", 6.4mm
Mounting Holes B.C.D.	11.59", 294.4mm
Depth	5.5", 139.7 mm
Net Weight	7.5 lbs, 3.4 kg
Shipping Weight	9.7 lbs, 4.4 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 paper dust cap