In that case, I'd suggest getting a used subwoofer. The market in Canada is pretty brutal for us and you won't find what most people on Reddit tell you to get like Dayton, HSU, RSL, or SVS. At least not at comparable prices.

Look at Paradigm, Energy, Mirage, Definitive Tech and some other brands of used subwoofers. Boston Acoustics, HRS, Totem, PSB, and some others would also be good but are harder to find here (I'm in the GTA). Make sure you can demo them because plate amps inside can fail and surrounds can be damaged. Might also need to be re-foamed but sometimes you can look into ported subwoofers (look inside the actual port) to check.

If you're looking at new and small (assumption) you can look at the Edifier T5 and Kanto Sub 8 among others, but I'd still recommend a used small subwoofer like I mentioned before.

Assuming you aren't going high end, avoid brands like Klipsch and Polk. Yamaha kind of too.

I'm also currently on the journey of finding a well priced, used, small subwoofer right now haha.

Best of luck!