I bought this sub about a year ago, in a proper box it performs good with a smaller amp. Currently have dual 4 ohm coils down to 2ohm connected to a skar RP-1200.1D (gain only about 1/5th the way up) in a square box, 1.3 cuft. (NVX XMDFS121). All in a 2019 Chevy Equinox running stock sound system and alternator. It won't shake the whole block, but you won't hear the highway patrol creeping up on you...

Awesome sound definitely a good buy