Electro-Voice SX100+E 12" 2 Way Passive PA Cabinet The Electro-Voice Sx100 is a 200-watt, 12-inch two-way, high efficiency, constant-directivity portable speaker system. Through the extensive use of computer-aided design and modeling, Electro-Voice engineers have developed a state-of-the-art professional loudspeaker system. Its performance and physical design make it perfect for many applications requiring quality sound in portable and fixed environments.