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The Art and Science of Sound
DELTA PRO-18A Professional SeriesLong Throw Subwoofer for very small vented boxes. Over-size top plate and large pole vent help keep the coil cool.
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)
*
**
***
Nominal Basket Diameter
Nominal Impedance*
Power Rating**
Watts
Music Program
Resonance
Usable Frequency Range***
Sensitivity
Magnet Weight
Gap Height
Voice Coil Diameter
18", 457mm
4 or 8 ohms
500W
1000W
28Hz
37Hz-250Hz
96
67 oz
.38",9.53mm
2.5",63.5mm
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)
28Hz
5.3
3.43mH
10.38
.33
.32
493.19 ltr/17.41 cu. ft.
796.00cc
.25mm/N
18.9 T-M
128.1 grams
84
6.7mm
1188.0cm2
15.0mm
Thiele & Small Parameters
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
N/A
85-297 ltr/3.0-10.5 cu. ft.
18.00", 457.20mm
16.57", 420.88mm
Fitted as Standard
Fitted as Standard
.28", 7.11mm
17.25", 438.15mm
8.13", 206.50mm
17.00 lbs, 7.71 kg
20.5 lbs, 9.3 kg
Mounting Information
Materials of ConstructionCoil Construction
Coil
Magnet Composition
Core Details
Basket Materials
Cone Composition
Cone Edge Composition
Dust Cap Composition
Copper
Polyimide
Ferrite
Vented and Extended
Die-Cast Aluminum
Paper
Cloth
Solid Composition Paper
File: DeltaPro-18ALargeVentedCabinet250Watts.bb6
Delta Pro-18A Large Subwoofer CabinetBy Jerry McNutt, Eminence Speaker LLC Limit to 250 Watts; F3 of 36 Hz. Use a steep high pass at 30 Hz.
Box Properties --Description-- Name: Type: Vented Box Shape: Prism, square --Box Parameters-- Vb = 10 cu.ft V(total) = 10.45 cu.ft Fb = 35 Hz QL = 7 F3 = 36.01 Hz Fill = minimal --Vents-- No. of Vents = 4 Vent shape = round Vent ends = one flush Dv = 4 in Lv = 5.845 in
Driver Properties --Description-- Name: Delta Pro-18A Type: Standard one-way driver Company: Eminence Speaker LLC Comment: 18" Sub Woofer --Configuration-- No. of Drivers = 1 --Driver Parameters-- Fs = 28.03 Hz Qms = 10.38 Vas = 17.62 cu.ft Xmax = 0.264 in Sd = 184.1 sq.in Qes = 0.33 Re = 5.3 ohms Le = 3.43 mH Z = 8 ohms Pe = 500 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
129
123
117
111
105
99
93
87
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
130
124
118
112
106
100
94
88
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- DeltaPro-18ALargeVentedCabinet250Watts.bb6
Maximum Electric Input Power (W/Hz) Eminence Designerwatts
200
100
20
10
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
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
Vent Air Velocity ( m/sec/Hz) with 250 watts Eminence Designer m/s48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Three -- DeltaPro-18ALargeVentedCabinet250Watts.bb6
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
Phase Response (deg/Hz) Eminence Designerdeg
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 Designermsec24
20
16
12
8
4
0
-4
-8
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: DeltaPro-18ASmallVentedCabinet500Watts.bb6
Delta Pro-18A Small Vented Woofer BoxBy Jerry McNutt, Eminence Speaker LLC Limit to 500 Watts; F3 of 63 Hz. Use steep high pass at 40 Hz.
Box Properties --Description-- Name: Type: Vented Box Shape: Prism, square --Box Parameters-- Vb = 2.7 cu.ft V(total) = 3.036 cu.ft Fb = 55 Hz QL = 7 F3 = 62.92 Hz Fill = minimal --Vents-- No. of Vents = 2 Vent shape = round Vent ends = one flush Dv = 4 in Lv = 3.869 in
Driver Properties --Description-- Name: Delta Pro-18A Type: Standard one-way driver Company: Eminence Speaker LLC Comment: 18" Sub Woofer --Configuration-- No. of Drivers = 1 --Driver Parameters-- Fs = 28.03 Hz Qms = 10.38 Vas = 17.62 cu.ft Xmax = 0.264 in Sd = 184.1 sq.in Qes = 0.33 Re = 5.3 ohms Le = 3.43 mH Z = 8 ohms Pe = 500 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 500 watts Eminence Designer
dB
132
126
120
114
108
102
96
90
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
130
124
118
112
106
100
94
88
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- DeltaPro-18ASmallVentedCabinet500Watts.bb6
Maximum Electric Input Power (W/Hz) Eminence Designerwatts
200
100
20
10
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Cone Displacement ( mm/Hz) with 500 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 500 watts Eminence Designer m/s48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Three -- DeltaPro-18ASmallVentedCabinet500Watts.bb6
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
Phase Response (deg/Hz) Eminence Designerdeg
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 Designermsec24
20
16
12
8
4
0
-4
-8
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: DeltaPro-18AMedVentedCabinet500Watts.bb6
Delta Pro-18A Med Vented Sub CabinetBy Jerry McNutt, Eminence Speaker LLC Limit to 500 Watts; F3 of 48 Hz. Use a steep high pass at 35 Hz.
Box Properties --Description-- Name: Type: Vented Box Shape: Prism, square --Box Parameters-- Vb = 5 cu.ft V(total) = 5.339 cu.ft Fb = 45 Hz QL = 7 F3 = 48.28 Hz Fill = minimal --Vents-- No. of Vents = 4 Vent shape = round Vent ends = one flush Dv = 3 in Lv = 3.585 in
Driver Properties --Description-- Name: Delta Pro-18A Type: Standard one-way driver Company: Eminence Speaker LLC Comment: 18" Sub Woofer --Configuration-- No. of Drivers = 1 --Driver Parameters-- Fs = 28.03 Hz Qms = 10.38 Vas = 17.62 cu.ft Xmax = 0.264 in Sd = 184.1 sq.in Qes = 0.33 Re = 5.3 ohms Le = 3.43 mH Z = 8 ohms Pe = 500 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 500 watts Eminence Designer
dB
132
126
120
114
108
102
96
90
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
130
124
118
112
106
100
94
88
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- DeltaPro-18AMedVentedCabinet500Watts.bb6
Maximum Electric Input Power (W/Hz) Eminence Designerwatts
200
100
20
10
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Cone Displacement ( mm/Hz) with 500 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 500 watts Eminence Designer m/s48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Three -- DeltaPro-18AMedVentedCabinet500Watts.bb6
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
Phase Response (deg/Hz) Eminence Designerdeg
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 Designermsec24
20
16
12
8
4
0
-4
-8
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: DeltaPro-18AMedBigVentedCabinet500Watts.bb6
Delta Pro-18A Med to Large Sub CabinetBy Jerry McNutt, Eminence Speaker LLC Limit to 500 Watts; F3 of 45 Hz. Use steep high pass at 35 Hz.
Box Properties --Description-- Name: Type: Vented Box Shape: Prism, square --Box Parameters-- Vb = 6 cu.ft V(total) = 6.309 cu.ft Fb = 46 Hz QL = 7 F3 = 45.31 Hz Fill = minimal --Vents-- No. of Vents = 4 Vent shape = round Vent ends = one flush Dv = 3 in Lv = 2 in
Driver Properties --Description-- Name: Delta Pro-18A Type: Standard one-way driver Company: Eminence Speaker LLC Comment: 18" Sub Woofer --Configuration-- No. of Drivers = 1 --Driver Parameters-- Fs = 28.03 Hz Qms = 10.38 Vas = 17.62 cu.ft Xmax = 0.264 in Sd = 184.1 sq.in Qes = 0.33 Re = 5.3 ohms Le = 3.43 mH Z = 8 ohms Pe = 500 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 500 watts Eminence Designer
dB
132
126
120
114
108
102
96
90
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
130
124
118
112
106
100
94
88
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- DeltaPro-18AMedBigVentedCabinet500Watts.bb6
Maximum Electric Input Power (W/Hz) Eminence Designerwatts
200
100
20
10
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Cone Displacement ( mm/Hz) with 500 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 500 watts Eminence Designer m/s48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Three -- DeltaPro-18AMedBigVentedCabinet500Watts.bb6
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
Phase Response (deg/Hz) Eminence Designerdeg
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 Designermsec24
20
16
12
8
4
0
-4
-8
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: DeltaPro-18ATwoBy18VentedCabinet1000Watts.bb6
Delta Pro-18A Two By 18 SubwooferBy Jerry McNutt, Eminence Speaker LLC Limit to 1000 Watts; F3 of 49 Hz. Use a steep high pass at 35 Hz. Slot Ports.
Box Properties --Description-- Name: Type: Vented Box Shape: Prism, square --Box Parameters-- Vb = 9.8 cu.ft V(total) = 10.7 cu.ft Fb = 45 Hz QL = 7 F3 = 48.75 Hz Fill = minimal --Vents-- No. of Vents = 2 Vent shape = rectangle Vent ends = one flush Hv = 20.5 in Wv = 2 in Lv = 6.773 in
Driver Properties --Description-- Name: Delta Pro-18A Type: Standard one-way driver Company: Eminence Speaker LLC Comment: 18" Sub Woofer --Configuration-- No. of Drivers = 2 Mounting = Standard Wiring = Parallel Drivers sum coherently = Yes --Driver Parameters-- Fs = 28.03 Hz Qms = 10.38 Vas = 17.62 cu.ft [35.24] Xmax = 0.264 in Sd = 184.1 sq.in [368.3] Qes = 0.33 Re = 5.3 ohms [2.65] Le = 3.43 mH [1.715] Z = 8 ohms [4] Pe = 500 watts [1000]
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 1000 watts Eminence Designer
dB
138
132
126
120
114
108
102
96
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
136
130
124
118
112
106
100
94
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- DeltaPro-18ATwoBy18VentedCabinet1000Watts.bb6
Maximum Electric Input Power (W/Hz) Eminence Designerwatts
200
100
20
10
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Cone Displacement ( mm/Hz) with 1000 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 1000 watts Eminence Designer m/s48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Three -- DeltaPro-18ATwoBy18VentedCabinet1000Watts.bb6
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
Phase Response (deg/Hz) Eminence Designerdeg
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 Designermsec24
20
16
12
8
4
0
-4
-8
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K