Datasheet
The Art and Science of Sound
BETA-12LTA American Standard Series
Recommended for professional audio as a woofer in small sealed monitor, or as a PA woofer or monitor in a
vented enclosure.
Nominal Basket Diameter
Nominal Impedance*
Power Rating**
Resonance
Usable Frequency Range***
Sensitivity
Magnet Weight
Gap Height
Voice Coil Diameter
12”, 304.8mm
8 ohms
225W
45Hz
48Hz-8kHz
97.7
38 oz.
0.312”, 7.92mm
2”, 50.8mm
Specication
Resonant Frequency (fs)
DC Resistance (Re)
Coil Inductance (Le)
Mechanical Q (Qms)
Electromagnetic Q (Qes)
Total Q (Qts)
Compliance Equivalent Volume (Vas)
Peak Diaphragm Displacement Volume (Vd)
Mechanical Compliance of Suspension (Cms)
BL Product (BL)
Diaphragm Mass inc. Airload (Mms)
Efciency Bandwidth Product (EBP)
Maximum Linear Excursion (Xmax)
Surface Area of Cone (Sd)
Maximum Mechanical Limit (Xlim)
45Hz
7.37
0.83mH
6.44
0.55
0.51
136.3 liters / 4.8 cu. ft.
170cc
0.34mm/N
11.7 T-M
36 grams
82
3.2mm
532.4 cm2
8.0mm
Thiele & Small Parameters
Recommended Enclosure Volume
Sealed
Vented
Overall Diameter
Bafe Hole Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
Mounting Holes B.C.D.
Depth
Net Weight
Shipping Weight
14-51 liters/0.5-1.8 cu.ft.
56.6-116 liters/2-4.1 cu.ft.
12.03”, 305.5mm
10.95”, 278.1mm
tted as standard
tted as standard
0.25”, 6.4mm
11.59”, 294.3mm
4.47”, 114mm
8.1 lbs., 3.7 kg
10.2 lbs., 4.6 kg
Mounting Information
Copper voice coil
Polyimide former
Ferrite magnet
Vented core
Pressed steel basket
Paper Cone
Cloth cone edge
Solid composition paper dust cap
Materials of Construction
Please inquire about alternative impedances.
Multiple units exceed published rating evaluated under EIA 426A noise source and test standard while in a free-air, non-temperature controlled environment.
The average output across the usable frequency range when applying 1W/1M into the nominal impedance. Ie: 2.83V/8ohms, 4V/16ohms.
Eminence response curves are measured under the following conditions: All speakers are tested at 1w/1m using a variety of test set-ups for the appropriate impedance | LMS using 0.25” supplied microphone (software
calibrated) mounted 1m from wall/bafe | 2ft. X 2ft. bafe is built into the wall with the speaker mounted ush against a steel ring for minimum diffraction | Haer P1500 Trans-Nova amplier | 2700 cu.ft. chamber with
berglass on all six surfaces (three with custom-made wedges)
*
**
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