Eminence BETA-8A User Manual
Specication
Nominal Basket Diameter
Nominal Impedance*
Power Rating**
Watts
Music Program
Resonance
Usable Frequency Range***
Sensitivity
Magnet Weight
Gap Height
Voice Coil Diameter
Thiele & Small Parameters
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)
8”, 203.2mm
8 ohms
225W
450W
65Hz
78Hz-4.5kHz
95.1
34 oz
0.312”, 7.92mm
2”, 50.8mm
65Hz
5.99
0.49mH
4.95
0.42
0.38
23.3 ltr/0.82 cu. ft.
63cc
0.37mm/N
9.6 T-M
16 grams
156
3.0mm
210.0cm
7.4mm
The Art and Science of Sound
BETA-8A American Standard Series
Recommended for professional audio mid-bass applications or as a woofer in vented enclosures.
Also suitable as a mid-bass speaker in sealed enclosures.
2
Mounting Information
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
Materials of Construction
Coil Construction
Coil
Magnet Composition
Core Details
Basket Materials
Cone Composition
Cone Edge Composition
Dust Cap Composition
Solid Composition Paper
5.7-9.9 ltr/0.2-0.35 cu. ft.
8.5-19 ltr/0.3-0.67 cu. ft.
8.24”, 209.2mm
7.13”, 181mm
Fitted as Standard
Fitted as Standard
0.22”, 5.5mm
7.75”, 196.9mm
3.5”, 89mm
6.6 lbs, 3 kg
7.4 lbs, 3.4 kg
Aluminum
Polyimide
Ferrite
Vented
Pressed Steel
Paper
Cloth
Please inquire about alternative impedances.
*
Multiple units exceed published rating evaluated under EIA 426A noise source and test standard while in a free-air, nontemperature-controlled environment.
**
The average output across the usable frequency range when applying 1W/1m into the nominal impedance. Ie: 2.83 V/8 ohms, 4 V/16 ohms.
***
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 | 2 ft. X 2 ft. 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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