The ERIC ACS Series is optimized for the best performance and price for the mobile audio market. It uses the fine ERIC components: 4" coil LF driver, 3”coil titanium diaphragm compression driver and constant directivity horns. All HF drivers are protected by the protector circuit. ACS 2015M is designed for multi-use, for stage monitor, for PA system, etc. ACS 2018B,2218B&1815B are made of 25mm thickness HDF plywood. All cabinets are black textuse-painted covered. ACS 2012,2015,2215 are trapezoidal 10°per side. ACS 2012,2015M feature a stand mount.ERIC ACS Series is protected by a black full-face perforated heavy-duty metal grille.