Dayton Audio BST-1 High Power Pro... https://www.amazon.com/dp/B01CDDPJTI?ref=ppx_pop_mob_ap_share

Nobsound NS-03G Subwoofer... https://www.amazon.com/dp/B072KDNW3F?ref=ppx_pop_mob_ap_share

You will also need a power adapter if you don’t already have one.