The EPCS502B is the 5½" version of the EPCS Series. Shipped complete with an assembled back box ready to install, it fits in our class of EZIN models. These EZIN speaker models are designed to save you time and labour costs. Simply cut the hole, slide the speaker in and turn the cam screws found under the grill. Another great feature of the EPCS502B is the rear port for extended low frequency. Shipped with a cover cap over the port, just remove cap when not needed. (for air return ceiling) An excellent product for restaurants, retail stores and presentation rooms where high quality program material is required from a small non-obtrusive package.