IM4

Fosi Audio IM4 are the brand's inaugural in-ear headphones, featuring an open acoustic architecture and CNC-machined aluminum lightweight construction.

These headphones incorporate a 10 mm driver with a beryllium-coated polyurethane diaphragm and N52 dual magnetic system within a dual-chamber acoustic design.

Weighing only 7 grams per earpiece, they offer ergonomic breathable fit for extended listening sessions, available in black and silver finishes.

Fosi Audio introduces its IM4 Open-Back IEMs, featuring a 10mm beryllium diaphragm for a natural and detailed sound profile.

The IM4 is equipped with an N52 dual-magnet system and dual-chamber acoustic design for enhanced frequency balance and reduced distortion.

Users can customize their listening experience with interchangeable aluminum and brass nozzles and three ear tip sets: balanced, bass, and deep bass.