File: Beta8SmallVented Midrange150Watts.bb6
Beta8 Small Vented Mid Range Enclosure
By McJerry, Eminence Speaker LLC
Displacement Limited to 150 Watts; use a steep High Pass filter set to 130 Hz or higher.
Box Properties
--Description--
Name:
Type: Vented Box
Shape: Prism, square (optimum)
--Box Parameters--
Vb = 0.28 cu.ft
V(total) = 0.317 cu.ft
Fb = 95 Hz
QL = 7
F3 = 103.3 Hz
Fill = minimal
--Vents--
No. of Vents = 1
Vent shape = round
Vent ends = one flush
Dv = 2.5 in
Lv = 2.945 in
Driver Properties
--Description--
Name: Beta-8
Type: Standard one-way driver
Company: Eminence Speaker LLC
Comment: Revised OCT 2005
Piston: Paper cone.
Suspension: Cloth surround.
Dust Cap: Solid composition paper dust cap.
Frame: Pressed steel basket.
Voice Coil: 2 inch (50.8 mm) AL Wire. Kapton former.
Magnet: 34 oz ferrite magnet.
--Configuration--
No. of Drivers = 1
--Mechanical Parameters--
Fs = 65.1 Hz
Qms = 5
Vas = 24.29 liters
Cms = 0.379 mm/N
Mms = 15.45 g
Rms = 1.29 kg/s
Xmax = 3 mm
Xmech = 7.37 mm
P-Dia = 164.5 mm
Sd = 210 sq.cm
P-Vd = 0.0637 liters
--Electrical Parameters--
Qes = 0.42
Re = 6 ohms
Le = 0.49 mH
Z = 8 ohms
BL = 9.55 Tm
Pe = 225 watts
--Electromech. Parameters--
Qts = 0.38
no = 1.538 %
1-W SPL = 94.02 dB
2.83-V SPL = 95.27 dB
Page Two -- Beta8SmallVented Midrange150Watts.bb6
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 150 watts Eminence Designer
dB
123
117
111
105
99
93
87
81
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 Three -- Beta8SmallVented Midrange150Watts.bb6
Maximum Electric Input Power (W/Hz) Eminence Designer
watts
200
100
20
10
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Cone Displacement (mm/Hz) with 150 watts Eminence Designer
mm
16
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 150 watts Eminence Designer
m/s
48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Four -- Beta8SmallVented Midrange150Watts.bb6
System Impedance (ohms/Hz) Eminence Designer
ohms
80
70
60
50
40
30
20
10
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Phase Response (deg/Hz) Eminence Designer
deg
90
0
-90
±180
90
0
-90
±180
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Group Delay (msec/Hz) Eminence Designer
msec
24
20
16
12
8
4
0
-4
-8
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: Beta8MedVentedMultiPurposeBox145Watts.bb6
Beta8 Multi Purpose Med Vented Enclosure
By McJerry, Eminence Speaker LLC
Med Power Sat. use, 145 Watts Displacement Limit, use 150 Hz and up.
Low Power Semi-Full Range use, 75 Watt Displacement Limit, use 70 Hz and up.
Box Properties
--Description--
Name:
Type: Vented Box
Shape: Prism, square (optimum)
--Box Parameters--
Vb = 0.573 cu.ft
V(total) = 0.611 cu.ft
Fb = 64.8 Hz
QL = 7
F3 = 85.7 Hz
Fill = minimal
--Vents--
No. of Vents = 1
Vent shape = round
Vent ends = one flush
Dv = 2.5 in
Lv = 3.216 in
Driver Properties
--Description--
Name: Beta-8
Type: Standard one-way driver
Company: Eminence Speaker LLC
Comment: Revised OCT 2005
Piston: Paper cone.
Suspension: Cloth surround.
Dust Cap: Solid composition paper dust cap.
Frame: Pressed steel basket.
Voice Coil: 2 inch (50.8 mm) AL Wire. Kapton former.
Magnet: 34 oz ferrite magnet.
--Configuration--
No. of Drivers = 1
--Mechanical Parameters--
Fs = 65.1 Hz
Qms = 5
Vas = 24.29 liters
Cms = 0.379 mm/N
Mms = 15.45 g
Rms = 1.29 kg/s
Xmax = 3 mm
Xmech = 7.37 mm
P-Dia = 164.5 mm
Sd = 210 sq.cm
P-Vd = 0.0637 liters
--Electrical Parameters--
Qes = 0.42
Re = 6 ohms
Le = 0.49 mH
Z = 8 ohms
BL = 9.55 Tm
Pe = 225 watts
--Electromech. Parameters--
Qts = 0.38
no = 1.538 %
1-W SPL = 94.02 dB
2.83-V SPL = 95.27 dB
Page Two -- Beta8MedVentedMultiPurposeBox145Watts.bb6
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 145 watts Eminence Designer
dB
123
117
111
105
99
93
87
81
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 Three -- Beta8MedVentedMultiPurposeBox145Watts.bb6
Maximum Electric Input Power (W/Hz) Eminence Designer
watts
200
100
20
10
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Cone Displacement (mm/Hz) with 145 watts Eminence Designer
mm
16
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 145 watts Eminence Designer
m/s
48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Four -- Beta8MedVentedMultiPurposeBox145Watts.bb6
System Impedance (ohms/Hz) Eminence Designer
ohms
80
70
60
50
40
30
20
10
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Phase Response (deg/Hz) Eminence Designer
deg
90
0
-90
±180
90
0
-90
±180
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Group Delay (msec/Hz) Eminence Designer
msec
24
20
16
12
8
4
0
-4
-8
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: Beta8SealedHighpowerMidRange225Watts.bb6
Beta8 Sealed High Power Midrange Enclosure
By McJerry, Eminence Speaker LLC
Thermal Limit of 225 Watts; Use a steep High Pass filter set to 200 Hz or higher.
Box Properties
--Description--
Name:
Type: Closed Box
Shape: Prism, square
--Box Parameters--
Vb = 0.177 cu.ft
V(total) = 0.204 cu.ft
Qtc = 0.703
QL = 20
F3 = 146.2 Hz
Fill = heavy
Driver Properties
--Description--
Name: Beta-8
Type: Standard one-way driver
Company: Eminence Speaker LLC
Comment: Revised OCT 2005
Piston: Paper cone.
Suspension: Cloth surround.
Dust Cap: Solid composition paper dust cap.
Frame: Pressed steel basket.
Voice Coil: 2 inch (50.8 mm) AL Wire. Kapton former.
Magnet: 34 oz ferrite magnet.
--Configuration--
No. of Drivers = 1
--Mechanical Parameters--
Fs = 65.1 Hz
Qms = 5
Vas = 24.29 liters
Cms = 0.379 mm/N
Mms = 15.45 g
Rms = 1.29 kg/s
Xmax = 3 mm
Xmech = 7.37 mm
P-Dia = 164.5 mm
Sd = 210 sq.cm
P-Vd = 0.0637 liters
--Electrical Parameters--
Qes = 0.42
Re = 6 ohms
Le = 0.49 mH
Z = 8 ohms
BL = 9.55 Tm
Pe = 225 watts
--Electromech. Parameters--
Qts = 0.38
no = 1.538 %
1-W SPL = 94.02 dB
2.83-V SPL = 95.27 dB
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 225 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 -- Beta8SealedHighpowerMidRange225Watts.bb6
Maximum Electric Input Power (W/Hz) Eminence Designer
watts
200
100
20
10
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Cone Displacement (mm/Hz) with 225 watts Eminence Designer
mm
16
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 Designer
ohms
80
70
60
50
40
30
20
10
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Three -- Beta8SealedHighpowerMidRange225Watts.bb6
Phase Response (deg/Hz) Eminence Designer
deg
90
0
-90
±180
90
0
-90
±180
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Group Delay (msec/Hz) Eminence Designer
msec
24
20
16
12
8
4
0
-4
-8
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
