This is a very rare Firebird factory subwoofer system. These systems replace the factory 6x9 rear speakers with ported boxes with a 4x6 inch speaker and a small subwoofer. This system includes both boxes with speakers, the harness with factory amplifier and 1984 style dash on/off switch. The subwoofers have deteriorated and need to be replaced. It would not be a bad idea to replace the 4x6's too. The stereo connectors are missing but could be easily replaced if you want to use a factory stereo. Don't miss out on this very rare opportunity to buy this hard to find system.