Rockville RV8.1A 400W 8" Loaded Car Subwoofer Enclosure with Mono Amplifier and Amp Kit, Vented Design, CEA-2006 Compliant, Compact Size, for Car Audio

Goldwood Sound Speaker Box Crossover Terminal Cups 2 Round Passive Speaker Terminal Plate Crossovers Black (XO-310-2)

Goldwood Sound Speaker Box Terminal Cups 2 Square Power Speaker Terminal Plates Black (SCT-1000-2)