This is the Cerwin Vega VPAS12ST 12" spare tire mount powered subwoofer enclosure (amplifier is built in).

• 12" Powered Active Subwoofer - Spare Tire Application
• Fits most vehicles without removing spare tire
• Power: 200W RMS @ 4 Ohm @ 100Hz / 600W Max
• Custom Sealed Cast Aluminum Housing
• Remote Control for Volume and Bass Boost
• Low-Pass / Phase Switch / Auto Turn-On/Off
• Plug and Play Connection System
• Dimensions (Dia. x H): 14.2" x 5.7" (360mm x 145mm)