JL Audio 13TW5V2-2 1-Way 13.5in. Car Subwoofer
JL Audio 13TW5V2-2 1-Way 13.5in. Critical Mass 10 single 4 ohm.
They were part of a 2 way sub project. Powered by a hd 700/5, they can both handle more in min recommended sealed. 8 CU/ft for the JL. 5 for the Critical Mass.
The critical mass was re foamed before testing in a sealed enclosure. Both are great sounding subwoofers.