Eminence IMPERO 12A 12" High Power Driver Speaker 8 Ohm 1100W The Eminence Impero 12A 12" high power pro audio speaker is optimized for use in vented enclosures. Its 1,100 watt continuous power rating is a result of Eminence"s extensive experience designing and manufacturing loudspeaker drivers for serious professional use. This 12" 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 12A"s performance is Ideal For full-range 2-way top boxes, 2-way boxes over subs, bass guitar boxes, and compact subwoofer speaker systems. Recommended enclosure volume: Vented: 33.98 ~ 118.9 liters / 1.2 ~ 4.2 cu. ft.