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Eminence Impero 18C 18" High Power Speaker, 4 Ohm

PA SKU # EMN IMPERO18C MFR # IMPERO 18C UPC # 876358002061
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  • 18" High Power Driver, 4 Ohm, 1200 Watt

18" High Power Driver, 4 Ohm, 1200 Watt

The Eminence Impero 18C 18" high power pro audio speaker is optimized for use in vented enclosures. Its 1,200 watt continuous power rating is a result of Eminence's extensive experience designing and manufacturing loudspeaker drivers for serious professional use.

This 18" cast frame transducer features a 4" diameter copper voice coil that is wound on a fiberglass former. A large magnet, extended and vented pole piece, bumped back plate, and 1/2" thick x 7-1/2" diameter top plate ensure substantial motor strength, resulting in tremendous bass output.

The Impero 18C's performance is ideal for 4 ohm full-range 3-way boxes, bass guitar boxes, and compact to medium-sized subwoofer speaker systems. Recommended enclosure volume: Vented: 113.2 ~ 277.5 liters / 4 ~ 9.8 cu. ft.
  • Ultra-high power handling capacity guarantees long-term durability
  • 4" diameter copper voice coil on fiberglass former, 4 ohm impedance
  • Weather-resistant paper cone and dust cap, treated cloth edge
  • Die cast basket is light yet strong, ready to handle rough travel
  • Massive, optimized motor structure helps move serious volumes of air
  • Capable of sustaining thunderous levels of sub-bass
  • Hand built in the USA
  • SPECIFICATION
  • Nominal Basket Diameter: 18", 457.2mm
  • Nominal Impedance*: 4 ohms
  • Power Rating**
  • Watts: 1200W
  • Music Program: 2400W
  • Resonance: 31.48Hz
  • Usable Frequency Range: 36Hz - 0.82kHz
  • Sensitivity***: 94.5dB
  • Magnet Weight: 109 oz.
  • Gap Height: 0.5", 12.7mm
  • Voice Coil Diameter: 4", 101.6mm
  • THIELE & SMALL PARAMETERS
  • Resonant Frequency (fs): 31.48Hz
  • DC Resistance (Re): 3.13
  • Coil Inductance (Le): 1.09mH
  • Mechanical Q (Qms): 10.13
  • Electromagnetic Q (Qes): 0.35
  • Total Q (Qts): 0.34
  • Compliance Equivalent Volume (Vas): 317.02 liters / 11.19 cu.ft.
  • Peak Diaphragm Displacement Volume (Vd): 942.7cc
  • Mechanical Compliance of Suspension (Cms): 0.17mm/N
  • BL Product (BL): 16.1 T-M
  • Diaphragm Mass Inc. Airload (MMs): 147.56 grams
  • Efficiency Bandwidth Product (EBP): 89.48
  • Maximum Linear Excursion (Xmax): 8.13mm
  • Surface Area of Cone (Sd): 1159 cm2
  • Maximum Mechanical Limit (Xlim): 20.1mm
  • MOUNTING INFORMATION
  • Recommended Enclosure Volume
  • Sealed: N/a
  • Vented: 118.9-339.8 liters / 4.2-12 cu.ft.
  • Driver Volume Displaced: 409.6 cu.in. / 6.7 liters
  • Overall Diameter: 18", 457.2mm
  • Baffle Hole Diameter: 16.56", 420.62mm
  • Front Sealing Gasket: Fitted as standard
  • Rear Sealing Gasket: Fitted as standard
  • Mounting Holes Diameter: 0.28", 7.1mm
  • Mounting Holes B.C.D.: 17.25", 438.1mm
  • Depth: 8.31", 211.07mm
  • Net Weight: 27.3 lbs, 12.3 kg
  • Shipping Weight: 30.8 lbs, 13.9 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
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