New Reference speakers are designed to deliver Infinitys signature sound in more vehicles. They feature edge-driven textile tweeters for smooth, clear highs and the larger models ofter an adjustable tweeter output level control for optimization based on installation location. Oversized Plus One woofers offer more surface area for higher bass output and enhanced midrange performance. Plus our newly engineered basket is optimized to fit most factory openings. Available in a range of standard sizes 3", 4", 5-1/4", 6-1/2", 6" x 8" and 4" x 6" coaxial, 6" x 9" 3 way, and 5-1/4", 6-1/2", and 6" x 9" component they are the perfect upgrade from factory speakers.