Infinity Harman PRIMUS 1200T High-Performance Sub Woofer BassTube Looking for a more moving audio experience? Take Infinity car audio for a ride. Innovative materials and breakthrough engineering have always put Infinity products out in front of the competition. So expect extreme output from Infinity Harman PRIMUS 1200T High-Performance Sub Woofer BassTube subs, but be prepared for accuracy and detail that may simply blow you away. The PRIMUS Series sub-woofers feature SSI™ (Selectable Smart Impedance), a HARMAN-exclusive impedance selector, that lets you choose a 2- or 4-ohm impedance at the flip of a switch. Our proprietary aero-cooling design keeps the voice coil cool while optimizing power handling and long term reliability. And, the acoustically damped glass-fibre cones have been engineered to minimize distortion and unwanted artifacts. More performance. More flexibility. You get both when you step up to a Infinity Harman PRIMUS 1200T High-Performance Sub Woofer BassTube.