Description
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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