The Infinity Reference Series features two floorstanding, two bookshelf, two center channel, one surround, and two powered subwoofer models. Each passive speaker mates 1” CMMD™ dome high-frequency drivers to medium-format waveguides. These controlled-directivity waveguides improve tweeter-to-midrange blend and off-axis response. These speakers also feature 4” or 5.5” CMMD™ flat piston mid-frequency drivers and 5.5” or 6.5” CMMD™ cone low-frequency drivers. The contemporary black woodgrain cabinets are braced with Slipstream™ tuned-ports to reduce turbulence for maximum airflow. Clean design with no visible fasteners on speaker surfaces.