Open-back vs Closed-back headphones

Open-back headphones have perforated or grille ear cups. Air moves freely between the driver and outside world.

Closed-back headphones have sealed ear cups. The driver’s rear wave is contained inside the cup.

Open-back trade-offs

• + Wider, more speaker-like soundstage
• + Less driver resonance, cleaner mids
• – Zero isolation – leaks sound to and from environment
• – Only for quiet solo listening (home office, quiet room)

Closed-back trade-offs

• + Isolation for commuting, gym, shared workspace
• + Bass extension often deeper (sealed enclosure)
• – Narrower stage, more “in your head” feel
• – Can have midrange coloration from cup resonance

Semi-open

Middle ground – some driver leak but partial isolation. FiiO EH11 is open-back retro; Soundcore Space One Pro is closed-back with ANC.