Check the listing for details. Electro-Voice SX100+ Passive Loudspeaker Black. Color: Black, Condition: New. Listed at 799.00 USD. The Electro-Voice Sx100+ is a 200-watt, 12" 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. The high-frequency section of the Sx100+ utilizes a molded-in, 65 x 65 constant-directivity horn. This unique pattern contributes to high intelligibility, vocals sound natural yet "cut through" in reverberant, noisy rooms. Coverage pattern is uniform, sound quality off-axis is very well maintained, even at 45 off axis (a 90 total coverage angle).