This is the Rockford Fosgate T252-S 5.25" 2-Way Component Speaker Kit.
The T252-S is a 5.25” 2-way component system featuring 1” aluminum dome tweeters and is rated at 75 Watts RMS. Kit includes pair or woofers with grilles, two tweeters with dedicated audiophile crossovers and mounting hardware.
The T252-S 5.25" is an alternative component system to the T1 with a major difference being a Billet aluminum phase plug to enhance cooling. The woofer features the same VAST surround having up to 25% increased cone area and a Flex Fit Basket for easy mounting. Another difference is the Aluminum Dome Neo-Tweeter for Fanatics who prefer this type of tonal quality over the T1. The same external audiophile crossover is used, configurable for single or bi-amp configurations.
Aluminum dome neo-tweeter with integral suspension
Internal tweeter mylar phase plug
Recessed tweeter mount uses standard 1-3/4" hole saw