Street Reference Pro speakers were designed specifically to handle maximum power and perform at extreme volume. SR Pro 6.5″ mids feature an accordion cloth surround designed for maximum excursion to play at extreme volume for an audio system that will absolutely scream. These 6.5″ pro audio mids are sold individually but can also be purchased in a set (SRXP62C) along with 2-SRXPT pro 4″ tweeters.