4Pro

Final's flagship closed headphone "DX10000 CL" features a True Diamond diaphragm and is priced over 1 million yen.

Astell&Kern introduces "A&ultima SP4000 Copper," a high-end portable DAC/amp "AK HC5," and limited "STELLA" earphones.

qdc celebrates its 10th anniversary with "4Pro" IEM featuring 4BA drivers and "CRAVE" with a tri-brid 15-driver design.

Celebrating a Decade of Innovation**: QDC unveils the '4Pro' IEM, marking their 10th anniversary, featuring advanced audio technology and precision engineering.

Versatile Audio Modes**: The 4Pro offers three sound profiles—HiFi, Studio, and Live—enabled by a single switch for tailored listening experiences.

Advanced Technical Specifications**: Equipped with a 4BA driver configuration, the frequency range spans 10Hz to 30kHz with an impedance of 10–23Ω.