Description
18" High Power Driver, 8 Ohm, 1200 Watt
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 back plate, 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
- Hand built in the USA
Specifications:
- SPECIFICATION
- 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
- MOUNTING INFORMATION
- Recommended Enclosure Volume
- Sealed: N/a
- Vented: 113.2-277.5 liters / 4-9.8 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", 438.15mm
- 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