Are there any affordable and good loudspeakers to replace the front two?

They installed two paper loudspeakers in the front, and the rear is completely sealed. I replaced the front ones with mid-bass speakers and the rear with full-range loudspeakers, but when I turn up the volume, there's resonance! It's like the BMW car door speakers that come with their own enclosures have much better sound quality! Even after using soundproof cotton and vibration dampening pads, it's all for nothing! 😬