BETA-8CX American Standard SeriesRecommended for professional audio mid-range reproduction in sealed enclosures. Also suitable for mid-bass or floor monitor applications in vented 2-way cabinets.
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/baffle | 2ft. X 2ft. baffle is built into the wall with the speaker mounted flush against a steel ring for minimum diffraction | Hafler P1500 Trans-Nova amplifier | 2700 cu.ft. chamber with
fiberglass on all six surfaces (three with custom-made wedges)
*
**
***
Nominal Basket DiameterNominal Impedance*Power Rating** Watts Music ProgramResonanceUsable Frequency Range***SensitivityMagnet WeightGap HeightVoice Coil Diameter
8”, 203.2mm8 ohms
250W500W63Hz
74Hz-20kHz93.3
38 oz.0.313”, 7.94mm
2”, 50.8mm
Specification
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)Efficiency Bandwidth Product (EBP)Maximum Linear Excursion (Xmax)Surface Area of Cone (Sd)Maximum Mechanical Limit (Xlim)
63Hz5.6
0.85mH8.820.340.33
19.99 liters / .71 cu.ft.67.20cc
0.32mm/N11.1 T-M
18.3 grams193.1
3.2mm210.0 cm2
6.9mm
Thiele & Small Parameters
Recommended Enclosure Volume Sealed VentedDriver Volume DisplacedOverall DiameterBaffle Hole DiameterFront Sealing GasketRear Sealing GasketMounting Holes DiameterMounting Holes B.C.D.DepthNet WeightShipping Weight
3-10 liters/ 0.1-0.4 cu.ft.8-21 liters/0.3-0.8 cu.ft.48.4 cu.in. / 0.79 liters
8.24”, 209.3mm7.13”, 181.1mm
Fitted as standardFitted as standard
0.22”, 5.6mm7.75”, 196.9mm
3.5”, 88.9mm6.8 lbs., 3.1 kg7.5 lbs., 3.4 kg
Mounting Information
Copper voice coilKapton formerFerrite magnetTapered CoaxPressed steel basketTreated Paper ConeSealed Cloth cone edgeZurette dust cap
Materials of Construction
File: Beta8CXSmallVentedBox200Watts.bb6
Beta8CX Small Vented CabinetBy Jerry McNutt, Eminence Speaker LLC200 Watt Displacement Limit; Use above 100 Hz.Small design that can handle a lot of power if used with a Subwoofer.
Box Properties--Description--Name: Type: Vented BoxShape: Prism, square--Box Parameters--Vb = 0.25 cu.ftV(total) = 0.3 cu.ftFb = 102 HzQL = 7F3 = 102.8 HzFill = minimal--Vents--No. of Vents = 1Vent shape = roundVent ends = one flushDv = 3 inLv = 4.618 in
Driver Properties--Description--Name: Beta-8CX - LFType: Two-way coaxial driverCompany: Eminence Speaker LLCComment: Revised OCT 2008Piston: Paper cone.Suspension: Cloth surround.Dust Cap: Solid composition paper dust cap.Frame: Pressed steel basket.Voice Coil: 2 inch (50.8 mm) coated copper. Kapton former.Magnet: 38 oz ferrite magnet.--Configuration--No. of Drivers = 1--Driver Parameters--Fs = 65.52 HzQms = 8.82Vas = 0.706 cu.ftXmax = 0.126 inSd = 32.55 sq.inQes = 0.34Re = 5.58 ohmsLe = 0.85 mHZ = 8 ohmsPe = 250 watts
Normalized Amplitude Response (dB-SPL/Hz) Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 200 watts Eminence Designer
dB
125
119
113
107
101
95
89
83
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Maximum Acoustic Power (dB-SPL/Hz at 1 m) Eminence Designer
dB
124
118
112
106
100
94
88
82
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- Beta8CXSmallVentedBox200Watts.bb6
Cone Displacement (mm/Hz) with 200 watts Eminence Designermm16
14
12
10
8
6
4
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Vent Air Velocity (m/sec/Hz) with 200 watts Eminence Designerm/s48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
System Impedance (ohms/Hz) Eminence Designerohms
80
70
60
50
40
30
20
10
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: Beta8CXMedVentedBox100Watts.bb6
Beta8CX Medium Vented CabinetBy Jerry McNutt, Eminence Speaker LLCDisplacement Limted to 100 Watts; F3 at 74 Hz.Best used above 95 Hz. Compact two-way Sat.
Box Properties--Description--Name: Type: Vented BoxShape: Prism, square (optimum)--Box Parameters--Vb = 0.55 cu.ftV(total) = 0.599 cu.ftFb = 70 HzQL = 7F3 = 73.84 HzFill = minimal--Vents--No. of Vents = 1Vent shape = roundVent ends = one flushDv = 3 inLv = 4.352 in
Driver Properties--Description--Name: Beta-8CX - LFType: Two-way coaxial driverCompany: Eminence Speaker LLCComment: Revised OCT 2008Piston: Paper cone.Suspension: Cloth surround.Dust Cap: Solid composition paper dust cap.Frame: Pressed steel basket.Voice Coil: 2 inch (50.8 mm) coated copper. Kapton former.Magnet: 38 oz ferrite magnet.--Configuration--No. of Drivers = 1--Driver Parameters--Fs = 65.52 HzQms = 8.82Vas = 0.706 cu.ftXmax = 0.126 inSd = 32.55 sq.inQes = 0.34Re = 5.58 ohmsLe = 0.85 mHZ = 8 ohmsPe = 250 watts
Normalized Amplitude Response (dB-SPL/Hz) Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 100 watts Eminence Designer
dB
122
116
110
104
98
92
86
80
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Maximum Acoustic Power (dB-SPL/Hz at 1 m) Eminence Designer
dB
124
118
112
106
100
94
88
82
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- Beta8CXMedVentedBox100Watts.bb6
Cone Displacement (mm/Hz) with 100 watts Eminence Designermm16
14
12
10
8
6
4
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Vent Air Velocity (m/sec/Hz) with 100 watts Eminence Designerm/s48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
System Impedance (ohms/Hz) Eminence Designerohms
80
70
60
50
40
30
20
10
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: Beta8CXHighPowerSealedMidRange250Watts.bb6
Beta8CX Sealed High Power Midrange EnclosureBy Jerry McNutt, Eminence Speaker LLCThermally Limited to 250 Watts; must use a steep high pass filter set to200 hz or above.
Box Properties--Description--Name: Type: Closed BoxShape: Prism, square--Box Parameters--Vb = 0.0999 cu.ftV(total) = 0.128 cu.ftQtc = 0.712QL = 20F3 = 172.7 HzFill = heavy
Driver Properties--Description--Name: Beta-8CX - LFType: Two-way coaxial driverCompany: Eminence Speaker LLCComment: Revised Oct 2008Piston: Paper cone.Suspension: Cloth surround.Dust Cap: Solid composition paper dust cap.Frame: Pressed steel basket.Voice Coil: 2 inch (50.8 mm) coated copper. Kapton former.Magnet: 38 oz ferrite magnet.--Configuration--No. of Drivers = 1--Driver Parameters--Fs = 65.52 HzQms = 8.82Vas = 0.706 cu.ftXmax = 0.126 inSd = 32.55 sq.inQes = 0.34Re = 5.58 ohmsLe = 0.85 mHZ = 8 ohmsPe = 250 watts
Normalized Amplitude Response (dB-SPL/Hz) Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 250 watts Eminence Designer
dB
126
120
114
108
102
96
90
84
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Maximum Acoustic Power (dB-SPL/Hz at 1 m) Eminence Designer
dB
124
118
112
106
100
94
88
82
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Top Related