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 fiberglass 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 fiberglass 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
• Handbuilt in the USA

Specifications:

• Basket Diameter: 18"
• Impedance: 8 ohms
• Power Rating: 1200W (Watts), 2400W (Music Program)
• Resonance: 33.17Hz
• Frequency Range: 39Hz - 0.82kHz
• Sensitivity: 95.9dB
• Magnet Weight: 109 oz.
• Gap Height: 0.5", 12.7mm
• Voice Coil Diameter: 4", 101.6mm

• Resonant Frequency: 33.17Hz
• DC Resistance: 5.41
• Coil Inductance: 1.47mH
• Mechanical Q: 14.02
• Electromagnetic Q: 0.44
• Total Q: 0.43
• Equivalent Volume: 317.02 liters / 11.19 cu. ft.
• Diaphragm Displacement Volume: 927.2cc
• Compliance of Suspension: 0.17mm/N
• BL Product: 18.9 T-M
• Diaphragm Mass: 139.52 grams
• Efficiency Bandwidth Product: 75.37
• Maximum Linear Excursion: 8mm
• Surface Area of Cone: 1159 cm2
• Maximum Mechanical Limit: 20.1mm