The Reference 152 is the smallest member of the Reference Collection. This petite bookshelf speaker has 1" (25mm) CMMD™ high-frequency driver which pairs seamlessly with woofer. The 5.25" (130mm) CMMD™ woofer works in conjunction with the tuned-port enclosure to provide powerful bass response that will enhance your cinematic experience. The R152's has a classic stylish design which will complement any room in your home.