Do you have to build a box behind your speakers to make them sound better or protect them?

Building a box behind your speakers, often referred to as a speaker enclosure, can enhance sound quality by optimizing the speaker's performance and reducing unwanted resonance. However, it's not always necessary; many speakers are designed to perform well without additional enclosures. Protection from damage can be achieved through other means, like using speaker covers or placing them in safe locations. Ultimately, the need for a box depends on the specific speakers and the desired sound quality.