The new universal IEM “FRONTIER” from qdc! The unique “Rear Cavity Microhole” technology dramatically improves low-frequency expression, which has been a weak point of BA drivers. High resolution and rich sound are achieved, and the professional monitor tuning matches all kinds of music. Comfortable wearing comfort and beautiful design are also attractive.

qdc / FRONTIER Aquamarine QDC-FRONTIER-AQ
qdc / FRONTIER Emerald QDC-FRONTIER-EM