Infinity Reference 1200S Car Audio SubwooferLow Profile Design Because todays compact cars offer less space, the Infinity Reference Subwoofers are designed to fit into small enclosures. Theyre slim, sleek, stylish, and dont sacrifice on sound. Harman Proprietary SSITM (Selectable Smart Impedance) Unlike most dual voice coil woofers, which provide either 1 or 4 ohms or 2 or 8 ohms, the Infinity Reference Subwoofers allow the listener to 2 ohm and 4 ohm at the flip of a switch, providing the two