ARCS II features one 15-inch neodymium LF driver in a bass-reflex tuned enclosure and one 3-inch neodymium diaphragm compression driver coupled to a DOSC waveguide. It is based on an active 2-way design with a nominal impedance of 8 ohms for both the HF and the LF section. The ARCS II cabinet is made of first grade baltic birch plywood to ensure maximum acoustical and mechanical integrity. It operates over the 50Hz to 20kHz nominal frequency bandwidth. This response can be lowered down to 25Hz with the addition of the SB28 subwoofer.