I recently came across a powered subwoofer that has a Advent metal label and Sunfire Technology printed on the amp/connection plate of the subwoofer cabinet.

I have been unable to find any information regarding this subwoofer by googling any of the advent / sunfire / carver etc. combinations I can come up with.

The subwoofer is a 15" bottom-fire.

Does anyone have any knowledge about this subwoofer?

Thank you in advance for any responses or help!