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Eminence IMPERO 18: 18 inch High Power Pro Woofer

Price: $259.99 $249.99

High power driver recommended for pro audio in vented enclosures. Suited for full-range three-way boxes, bass guitar boxes, and small subwoofers.
1200 watts / 39-800Hz / 4″ voice coil
Die-cast aluminum basket
Available in 4 or 8 ohms

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SKU: IMPERO 18 Categories: , , ,

Description

Eminence IMPERO 18: 18 inch High Power Pro Woofer

High power driver recommended for pro audio in vented enclosures. Suited for full-range three-way boxes, bass guitar boxes, and small subwoofers.

Available in 4 or 8 ohms

Click Here to Download 4 ohm PDF Spec Sheet

Click Here to Download 4 ohm PDF Cabinet Design

Click Here to Download 8 ohm PDF Spec Sheet

Click Here to Download 8 ohm PDF Cabinet Design

4 ohm Specification
Nominal Basket Diameter 18″, 457 mm
Nominal Impedance* 4 Ω
Power Rating*
Program Power 2400 W
Watts 1200 W
Resonance 31 Hz
Usable Frequency Range 36 Hz – 0.8 kHz
Sensitivity* 94.5 dB
Magnet Weight 109 oz.
Gap Height 0.5″, 12.7 mm
Voice Coil Diameter 4″, 102 mm
Thiele & Small Parameters
Resonant Frequency (fs) 31 Hz
DC Resistance (Re) 3.13 Ω
Coil Inductance (Le) 1.09m H
Mechanical Q (Qms) 10.13
Electromagnetic Q (Qes) 0.35
Total Q (Qts) 0.34
Compliance Equivalent Volume (Vas) 317.02 liters / 11.2 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 942.7 cc
Mechanical Compliance of Suspension (Cms) 0.17 mm/N
BL Product (BL) 16.1 T-M
Diaphragm Mass Inc. Airload (MMs) 148 grams
Efficiency Bandwidth Product (EBP) 89
Maximum Linear Excursion (Xmax) 8.13 mm
Surface Area of Cone (Sd) 1159 cm2
Maximum Mechanical Limit (Xlim) 20.2 mm
Mounting Information
Recommended Enclosure Volume
Sealed N/a
Vented 118.93-339.8 liters / 4.2-12 cu.ft.
Driver Volume Displaced 0.237 cu.ft. / 6.7 liters
Overall Diameter 18″, 457.2 mm
Baffle Hole Diameter 16.56″, 420.6 mm
Front Sealing Gasket Yes
Rear Sealing Gasket Yes
Mounting Holes Diameter 0.28″, 7.1mm
Mounting Holes B.C.D. 17.25″, 438.2mm
Depth 8.31″, 211.1 mm
Net Weight 27.3 lbs, 12.38 kg
Shipping Weight 30.8 lbs, 13.97 kgs
Materials of Construction
Coil Construction Copper voice coil
Coil Former Fiberglass former
Magnet Composition Ferrite magnet
Core Details Bumped Vented Extended core
Basket Materials Die-cast aluminum basket
Cone Composition Water resistant paper cone
Cone Edge Composition Treated cloth cone edge
Dust Cap Composition Water resistant treated paper dust cap


8 ohm Specification
Nominal Basket Diameter 18″, 457 mm
Nominal Impedance* 8 Ω
Power Rating*
Program Power 2400 W
Watts 1200 W
Resonance 33 Hz
Usable Frequency Range 39 Hz – 0.8 kHz
Sensitivity* 95.9 dB
Magnet Weight 109 oz.
Gap Height 0.5″, 12.7 mm
Voice Coil Diameter 4″, 102 mm
Thiele & Small Parameters
Resonant Frequency (fs) 33 Hz
DC Resistance (Re) 5.41 Ω
Coil Inductance (Le) 1.47m H
Mechanical Q (Qms) 14.02
Electromagnetic Q (Qes) 0.44
Total Q (Qts) 0.43
Compliance Equivalent Volume (Vas) 317.02 liters / 11.2 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 927.2 cc
Mechanical Compliance of Suspension (Cms) 0.17 mm/N
BL Product (BL) 18.9 T-M
Diaphragm Mass Inc. Airload (MMs) 140 grams
Efficiency Bandwidth Product (EBP) 75
Maximum Linear Excursion (Xmax) 8 mm
Surface Area of Cone (Sd) 1159 cm2
Maximum Mechanical Limit (Xlim) 20.2 mm
Mounting Information
Recommended Enclosure Volume
Sealed N/a
Vented 113.27-277.51 liters / 4-9.8 cu.ft.
Driver Volume Displaced 0.237 cu.ft. / 6.7 liters
Overall Diameter 18″, 457.2 mm
Baffle Hole Diameter 16.56″, 420.6 mm
Front Sealing Gasket Yes
Rear Sealing Gasket Yes
Mounting Holes Diameter 0.28″, 7.1mm
Mounting Holes B.C.D. 17.25″, 438.2mm
Depth 8.31″, 211.1 mm
Net Weight 27.3 lbs, 12.38 kg
Shipping Weight 30.8 lbs, 13.97 kgs
Materials of Construction
Coil Construction Copper voice coil
Coil Former Fiberglass former
Magnet Composition Ferrite magnet
Core Details Bumped Vented Extended core
Basket Materials Die-cast aluminum basket
Cone Composition Water resistant paper cone
Cone Edge Composition Treated cloth cone edge
Dust Cap Composition Water resistant treated paper dust cap