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