Flat-head earphones are a classic form of earphone, referring to earphones whose driver unit is directly exposed or only wrapped in a lightweight housing, and which rest outside the ear canal when worn, without penetrating into it. In contrast, in-ear earphones must be inserted into the ear canal. Flat-head earphones typically use dynamic drivers and are mostly cylindrical or disc-shaped, held in place by the cartilage of the outer ear, which is why they are also known as the predecessors of "earbud-style earphones" or "semi-in-ear earphones."
In terms of sound quality, the most distinctive feature of flat-head earphones is their open, natural, and spacious soundstage. Because they do not block the ear canal, ambient sounds can enter naturally, giving the sound a relaxed feel closer to "listening to speakers," rather than the oppressive "in-head effect" of in-ear models. When choosing, they suit users who prioritize long-wearing comfort, non-stuffy ears, and do not require high noise isolation—especially suitable for office use, walking, or listening before sleep. However, note that their bass quantity is usually weaker than in-ear earphones, and sound leakage is noticeable, which significantly reduces detail in noisy environments.
If you prefer clear vocals and a relaxed atmosphere without suffering from ear canal soreness, it is recommended to choose flat-head earphones with a lightweight housing and secure fit, paired with soft foam covers. This not only enhances bass texture but also reduces sound leakage, resulting in a more balanced and enduring listening experience.