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)

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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

Page Two -- Beta8CXHighPowerSealedMidRange250Watts.bb6

Cone Displacement (mm/Hz) with 250 watts Eminence Designermm16

14

12

10

8

6

4

2

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