BETA-15A American Standard Series

Specification
Nominal Basket Diameter
Nominal Impedance*
Power Rating**
Watts
Music Program
Resonance
Usable Frequency Range***
Sensitivity
Magnet Weight
Gap Height
Voice Coil Diameter
15”, 381mm
8 ohms
300W
600W
35Hz
45Hz-3.7kHz
98.2
34 oz
0.312”, 7.92mm
2”, 50.8mm
The Art and Science of Sound
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)
Efficiency Bandwidth Product (EBP)
Maximum Linear Excursion (Xmax)
Surface Area of Cone (Sd)
Maximum Mechanical Limit (Xlim)
35Hz
6.32
1.10mH
8.10
0.63
0.58
334.6 ltr/11.8 cu. ft.
330cc
0.35mm/N
11.5 T-M
60 grams
56
4.0mm
823.7cm2
11.6mm
BETA-15A American Standard Series
Recommended for professional audio as a woofer in sealed and vented enclosures.
Mounting Information
Recommended Enclosure Volume
Sealed
Vented
Overall Diameter
Baffle Hole Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
Mounting Holes B.C.D.
Depth
Net Weight
Shipping Weight
45-62 ltr/1.6-2.2 cu. ft.
99-175.6 ltr/3.5-6.2 cu. ft.
15.15”, 384.8mm
13.77”, 349.6mm
Fitted as Standard
Fitted as Standard
0.25”, 6.4mm
14.56”, 369.9mm
6.05”, 154mm
8.8 lbs, 4 kg
10.8 lbs, 4.9 kg
Materials of Construction
Coil Construction
Coil
Magnet Composition
Core Details
Basket Materials
Cone Composition
Cone Edge Composition
Dust Cap Composition
Copper
Polyimide
Ferrite
Vented And Extended
Pressed Steel
Paper
Cloth
Solid Composition Paper
* 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/baffle | 2 ft. X 2 ft. 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)
Beta15A Large Vented Woofer Enclosure
By McJerry, Eminence Speaker LLC
Displacement Limited to 100 Watts; use above 40 Hz.
Will require EQ for flat playback.
Box Properties
--Description-Name:
Type: Vented Box
Shape: Prism, square (optimum)
--Box Parameters-Vb =
6 cu.ft
V(total) = 6.133 cu.ft
Fb =
47.79 Hz
QL =
7
F3 =
44.78 Hz
Fill =
minimal
--Vents-No. of Vents = 2
Vent shape = round
Vent ends = one flush
Dv =
4.25 in
Lv =
0.75 in
Driver Properties
Normalized Amplitude Response (dB-SPL/Hz)
Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
5 Hz
10
50
100
500
1K
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 100 watts
5K
10 K
20 K
Eminence Designer
dB
--Description-123
Name: Beta-15
Type: Standard one-way driver
117
Company: Eminence Speaker LLC
111
Comment: Revised OCT 2005
Piston: Ribbed paper cone.
105
Suspension: Cloth surround.
Dust Cap: Solid composition paper dust cap.99
Frame: Pressed steel basket.
93
Voice Coil: 2 inch (50.8 mm) coated copper.
87
Magnet: 38 oz ferrite magnet.
--Configuration-81
No. of Drivers = 1
5 Hz
10
50
100
--Driver Parameters-Fs =
35 Hz
Qms =
8.1
Maximum Acoustic Power (dB-SPL/Hz at 1 m)
Vas =
334.6 liters
dB
Xmax =
4 mm
Sd =
823.7 sq.cm
127
Qes =
0.63
121
Re =
6.32 ohms
Le =
1.1 mH
115
Z=
8 ohms
109
Pe =
350 watts
500
1K
5K
10 K
20 K
Eminence Designer
103
97
91
85
5 Hz
File: Beta15ALargeVentedBox.bb6
10
50
100
500
1K
5K
10 K
20 K
Page Two -- Beta15ALargeVentedBox.bb6
Cone Displacement (mm/Hz) with 100 watts
Eminence Designer
mm
16
14
12
10
8
6
4
2
5 Hz
10
50
100
500
1K
Vent Air Velocity (m/sec/Hz) with 100 watts
5K
10 K
20 K
Eminence Designer
m/s
48
42
36
30
24
18
12
6
5 Hz
10
50
100
500
1K
System Impedance (ohms/Hz)
5K
10 K
20 K
Eminence Designer
ohms
80
70
60
50
40
30
20
10
5 Hz
10
50
100
500
1K
5K
10 K
20 K
Beta15A Sealed Semi-Full Range Enclosure
By McJerry, Eminence Speaker LLC
Displacement Limited to 175 Watts; use above 70 Hz.
Good Floor Monitor or as a general voice PA cabinet.
Box Properties
--Description-Name:
Type: Closed Box
Shape: Prism, square
--Box Parameters-Vb =
1.75 cu.ft
V(total) = 1.869 cu.ft
Qtc =
1.018
QL =
8.85
F3 =
70.73 Hz
Fill =
heavy
Driver Properties
Normalized Amplitude Response (dB-SPL/Hz)
Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
--Description-Name: Beta-15
5 Hz
10
50
100
500
1K
Type: Standard one-way driver
Company: Eminence Speaker LLC
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 175 watts
Comment: Revised OCT 2005
Piston: Ribbed paper cone.
dB
Suspension: Cloth surround.
125
Dust Cap: Solid paper dust cap.
Frame: Pressed steel basket.
119
Voice Coil: 2 inch (50.8 mm) coated copper.
113
Magnet: 38 oz ferrite magnet.
--Configuration-107
No. of Drivers = 1
101
--Driver Parameters-Fs =
35 Hz
95
Qms =
8.1
89
Vas =
334.6 liters
Xmax =
4 mm
83
Sd =
823.7 sq.cm
5 Hz
10
50
100
500
1K
Qes =
0.63
Re =
6.32 ohms
Le =
1.1 mH
Maximum Acoustic Power (dB-SPL/Hz at 1 m)
Z=
8 ohms
dB
Pe =
350 watts
5K
10 K
20 K
Eminence Designer
5K
10 K
20 K
Eminence Designer
127
121
115
109
103
97
91
85
5 Hz
File: Beta15ASealed.bb6
10
50
100
500
1K
5K
10 K
20 K
Page Two -- Beta15ASealed.bb6
Cone Displacement (mm/Hz) with 175 watts
Eminence Designer
mm
16
14
12
10
8
6
4
2
5 Hz
10
50
100
500
1K
System Impedance (ohms/Hz)
5K
10 K
20 K
Eminence Designer
ohms
80
70
60
50
40
30
20
10
5 Hz
10
50
100
500
1K
5K
10 K
20 K
Beta15A Med Vented Woofer Enclosure
By McJerry, Eminence Speaker LLC
Displacement Limited to 200 Watts; use above 60 Hz.
Will require EQ for flat playback.
Box Properties
--Description-Name:
Type: Vented Box
Shape: Prism, square (optimum)
--Box Parameters-Vb =
3.58 cu.ft
V(total) = 3.715 cu.ft
Fb =
65 Hz
QL =
7
F3 =
58.83 Hz
Fill =
minimal
--Vents-No. of Vents = 2
Vent shape = round
Vent ends = one flush
Dv =
4.64 in
Lv =
0.75 in
Driver Properties
Normalized Amplitude Response (dB-SPL/Hz)
Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
5 Hz
10
50
100
500
1K
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 200 watts
5K
10 K
20 K
Eminence Designer
dB
--Description-126
Name: Beta-15
Type: Standard one-way driver
120
Company: Eminence Speaker LLC
114
Comment: Revised OCT 2005
Piston: Ribbed paper cone.
108
Suspension: Cloth surround.
102
Dust Cap: Solid paper dust cap.
Frame: Pressed steel basket.
96
Voice Coil: 2 inch (50.8 mm) coated copper.
90
Magnet: 38 oz ferrite magnet.
--Configuration-84
No. of Drivers = 1
5 Hz
10
50
100
--Driver Parameters-Fs =
35 Hz
Qms =
8.1
Maximum Acoustic Power (dB-SPL/Hz at 1 m)
Vas =
334.6 liters
dB
Xmax =
4 mm
Sd =
823.7 sq.cm
127
Qes =
0.63
121
Re =
6.32 ohms
Le =
1.1 mH
115
Z=
8 ohms
109
Pe =
350 watts
500
1K
5K
10 K
20 K
Eminence Designer
103
97
91
85
5 Hz
File: Beta15AVented.bb6
10
50
100
500
1K
5K
10 K
20 K
Page Two -- Beta15AVented.bb6
Cone Displacement (mm/Hz) with 200 watts
Eminence Designer
mm
16
14
12
10
8
6
4
2
5 Hz
10
50
100
500
1K
Vent Air Velocity (m/sec/Hz) with 200 watts
5K
10 K
20 K
Eminence Designer
m/s
48
42
36
30
24
18
12
6
5 Hz
10
50
100
500
1K
System Impedance (ohms/Hz)
5K
10 K
20 K
Eminence Designer
ohms
80
70
60
50
40
30
20
10
5 Hz
10
50
100
500
1K
5K
10 K
20 K