Eminence Impero 18A 18" High Power Driver Speaker
Eminence Impero 18A 18" High Power Driver Speaker
Eminence Impero 18A 18" High Power Driver Speaker
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Eminence Impero 18A 18" High Power Driver Speaker

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Eminence Impero 18A 18" High Power Driver Speaker Description

SKU: IMPERO18A

The Eminence Impero 18A 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 fibreglass former. A large magnet, extended and vented pole piece, bumped backplate, and 1/2" thick x 7-1/2" diameter top plate ensure substantial motor strength, resulting in tremendous bass output.

The Impero 18A's performance is ideal for 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.

Features

  • Ultra-high power handling capacity guarantees long-term durability
  • 4" diameter copper voice coil on fibreglass former
  • 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

Tech Specs

Nominal Basket Diameter: 18", 457.2mm
Nominal Impedance*: 8 ohms
Power Rating**
Watts: 1200W
Music Program: 2400W
Resonance: 33.17Hz
Usable Frequency Range: 39Hz - 0.82kHz
Sensitivity***: 95.9dB
Magnet Weight: 109 oz.
Gap Height: 0.5", 12.7mm
Voice Coil Diameter: 4", 101.6mm
THIELE & SMALL PARAMETERS
Resonant Frequency (fs): 33.17Hz
DC Resistance (Re): 5.41
Coil Inductance (Le): 1.47mH
Mechanical Q (Qms): 14.02
Electromagnetic Q (Qes): 0.44
Total Q (Qts): 0.43
Compliance Equivalent Volume (Vas): 317.02 liters / 11.19 cu.ft.
Peak Diaphragm Displacement Volume (Vd): 927.2cc
Mechanical Compliance of Suspension (Cms): 0.17mm/N
BL Product (BL): 18.9 T-M
Diaphragm Mass Inc. Airload (MMs): 139.52 grams
Efficiency Bandwidth Product (EBP): 75.37
Maximum Linear Excursion (Xmax): 8mm
Surface Area of Cone (Sd): 1159 cm2
Maximum Mechanical Limit (Xlim): 20.1mm

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