Welcome to the official listing for the radius VOLT HP-NHR11C Series—a sophisticated, high-resolution digital in-ear monitor masterfully engineered by the Japanese audio experts at radius. Utilizing the highly regarded acoustic driver unit of the HP-NHR11 as its foundation, this next-generation model connects directly via USB-C and integrates a high-performance DAC chip.
The audio profile has been meticulously re-tuned to elevate upper-treble transparency and extension while retaining the iconic, bone-shaking VOLT sub-bass presence. It delivers dense, high-resolution audio textures seamlessly on modern smartphones, tablets, and laptops, complete with full built-in communication control.
This digital powerhouse IEM is available in two iconic premium finishes: Red (HP-NHR11CR) and Black (HP-NHR11CK). Please select your preferred color from the drop-down menu. Every unit is 100% brand new, factory-sealed, and sourced directly from authorized retail channels in Japan.
Red (HP-NHR11CR): A high-gloss, premium metallic sports red that brilliantly highlights the dynamic, ergonomic curves of the VOLT housing.
Black (HP-NHR11CK): A timeless, stealthy minimalist black that reflects sharp professional style and serious audiophile pedigree.
Multi-Function In-Line Remote with High-Quality Microphone: Features an integrated multi-function in-line controller and a high-sensitivity microphone built into the cable. You can effortlessly adjust the volume, play/pause music, skip tracks, and answer or end phone calls with simple button clicks. The high-quality microphone ensures crystal-clear voice transmission, making it perfect for hands-free voice calls, online video conferences, and gaming chats on your USB-C devices.
Studio-Grade 32bit/384kHz Built-in High-Performance DAC: Featuring an internal, high-fidelity Digital-to-Analog Converter (DAC), the HP-NHR11C supports true high-resolution playback up to 32bit / 384kHz simply by plugging into any USB-C port. It extracts the finest musical micro-nuances and master-tape dynamics without being buried by low-frequency energy, establishing a perfectly unified stereo image.
Synergistic High-MFD (Magnetic Flux Density) Structure: By placing an additional ring magnet directly in front of the 13.0mm dynamic driver, the opposing magnetic forces trap stray flux and dramatically intensify magnetic flux density around the voice coil. This structure gives the diaphragm instantaneous, pinpoint transient control. The sub-bass response hits with immense core weight and density, avoiding loose or muddy bloat.
Proprietary Deep Mount Earpieces: Comes standard with radius’s signature Deep Mount Earpieces. Their anatomical shape curves to sit deeper and broader within your ear canal. This precise seal prevents critical low-frequency leakage, locks in solid sub-bass extension, and provides an exceptionally stable, ergonomic fit that prevents the earphones from shifting or falling out.
2-Step Adjustable Ear Port System: Because seal depth deeply dictates how heavy bass is perceived, the acoustic nozzle features built-in multi-stage ridges. This allows you to click and lock the eartips into two different seating positions, ensuring you achieve an airtight, optimized fit tailored specifically to the size and shape of your ears.
Type: Closed-Back Digital Dynamic In-Ear Monitor
Driver Diameter: φ13.0 mm
Output Sound Pressure Level (Sensitivity): 107 ± 3 dB/mW
Frequency Response Range: 20 Hz - 40,000 Hz (Hi-Res Audio Certified)
Digital Processing Capability: Up to 32bit / 384kHz
Maximum Input Power: 10 mW
Impedance: 25 Ohms (±20%)
Interface Connector: USB Type-C (Digital Plug)
Cable Length: Approx. 1.2 meters (Y-Type Layout with In-Line Mic/Control)
Weight: Approx. 17g (Including Cable)
Package Includes: HP-NHR11C USB-C IEM Earphones, Deep Mount Earpieces (XS / S / M / L x 1 set each)