$329.00, located in Little Rock, Arkansas, USA (722**), item #155664289354
The pro models utilize a highly rigid, die-cast aluminum basket that eliminates flexing and resonance during playback to ensure the highest quality sound performance.UPGRADED MID-BASSThe Next-Generation R-Series speakers utilize a ferrite magnet, different from the neodymium from previous generations, and a larger motor structure that contributes to more mid-bass during the playback.