Can anyone help me buy speakers? I need a sub and I need a bass control slider/knob

pls help this is what I'm working with

the left one got an electrical buzz now I can't stand it

I have about 200 USD max to work with

These have been really good speakers though, are speakers never this good anymore for cheap? This is why I asked asia

Feel free to DM me btw if anyone else sees this way later

Really, I never thought of that. I'll do my own googling but any guides immediately come to mind?

Pretty sure that's what my current speakers are using actually but maybe I'm an idiot