Sentence examples for hi-fi from inspiring English sources

The word 'hi-fi' is correct and usable in written English.
It is an abbreviation for "high fidelity," which refers to the quality of sound reproduction in audio systems. You can use 'hi-fi' when referring to high-quality audio equipment or systems, such as speakers, amplifiers, or headphones. It can also be used to describe the quality of sound produced by these systems. For example: "I just purchased a new hi-fi system for my home theater. The sound quality is incredible." "His hi-fi headphones provided a rich and immersive listening experience."