qdc / FRONTIER Aquamarine QDC-FRONTIER-AQ

FRONTIER is a concept model newly developed using the latest technology, based on the desire for more people to experience the monitor sound of IEMs with BA drivers, which is the foundation of the brand and which has been cultivated as a leading manufacturer of professional-use custom IEMs. This model is a universal IEM that paves the way for qdc's new cutting-edge approach.

■[Head to the new edge] BA single full-range IEM that paves the way for a new cutting-edge
- The FRONTIER is a newly developed concept model universal IEM as a product that paves the way for a new cutting-edge brand, based on qdc's desire for more people to experience the monitor sound of its professional-use BA driver IEMs that it has cultivated. The FRONTIER features a single full-range, customised BA driver with a unique acoustic structure called the ‘Rear Cavity Micro’, which is a micrometer-sized hole on the back of the BA driver that creates a cavity. structure “Rear Cavity Microhole”. By eliminating turbulence noise and increasing vibration displacement, the quick sound rise, response and high resolution of a BA driver are maintained, while at the same time the sensitivity is improved and the low frequency drive power, which has been a weak point of BA drivers, is strengthened. The high impedance for professional use reduces peaks, distortion and noise, while at the same time making it possible to adjust the volume easily. [Head to the new edge] FRONTIER is a concept universal IEM that uses the latest technology to develop and sublimate the monitor sound of BA driver-equipped IEMs, the very foundation of qdc, and connect it to the next generation.

■New faceplate design ‘Translucent Mirror Gradation’
・The FRONTIER faceplate features the new design ‘Translucent Mirror Gradation’. The semi-transparent, mirror and gradient are combined to create a beautiful and stylish design. The shell also features a special coating treatment that gives the appearance of resin filling.

■ qdc Universal IEM's first foam-type earpieces and extensive accessories
- FRONTIER includes three sizes (S/M/L) of single-flange qdcTips Soft-fit earpieces made from recycled silicone to reduce the burden on the ear when wearing, and live/monitoring The qdc Universal IEM comes with three sizes (S/M/L) of foam-type earpieces, the first qdc Universal IEM to use these earpieces, which are designed for sound insulation and resistance to detachment, such as during live/monitoring. And a full range of accessories including a cable clip that fixes the cable to clothing to reduce touch noise, a cleaning tool and a semi-hard original carrying case that is robust & compact and easy to carry.


- Driver: BA type (customised BA single full-range)
- Number of drivers: 1 BA / 1 driver (per side)
- Format: sealed
- Frequency response range: 10-30,000 Hz
- Input sensitivity: 106 dB SPL/mW
- Impedance: 52Ω
- External sound isolation: 26 dB
- Cable: high Pure oxygen-free copper 4-core cable (approx. 120 cm) *Use black coloured PVC coating.
Connector: custom IEM 2-pin (0.78 mm), plug (L-shaped mould): 3.5 mm 3-pole
- Accessories: FRONTIER Cable 3.5 mm 3-pole unbalanced (L-shaped), qdcTips Soft-fit silicone earpieces: 3 pairs (S/M/L), Foam-type earpieces: 3 pairs (S/M/L), cable clip, cleaning tool, original carrying case
・Country of origin: China