Eminence IMPERO 18A 18" High Power Woofer Speaker 8-Ohms 2400 Watts

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