Puts Surround in Surround Sound 

With two ring radiator tweeters and two aerated polypropylene drivers per speaker in a trapezoidal cabinet, this surround specific speaker will wrap you in spectacular sound. It works great for both movies and multi-channel music. Use two pairs for 7.1 and you'll have ultimate surround sound! Recommended for amplifiers up to 200 watts per channel, these are serious surround speakers to suit the most discriminating listener. 
• Dipole/bipole switch allows you to use the speaker to the sides or rear of the listening area.
• Wall mountable with dual keyhole slots for easy setup. 
• Dual PowerPorts provide authoritative bass from a surround speaker, perfect for full bandwidth
  surround channels from Dolby TrueHD, Dolby Digital, DTS Master Audio, DVD-Audio and SACD.
• High Power Handling for amplifiers up to 200 watts per channel.