The NA3S stands as the benchmark entry-level model in the Nostalgia Audio Professional Series, meticulously crafted for aspiring audio professionals, singers, and audiophiles. With a focus on "high cost-performance effective ratio + balanced listening," the NA3S serves as a reliable key to the world of professional monitoring. It allows entry-level users to immerse themselves in a genuine professional audio experience without the need for significant financial investment. This makes the NA3S an excellent choice for those starting their journey in the realm of high-fidelity audio, providing them with enduring quality and performance. Core Structure: Classic Triple-Driver Configuration The NA3S utilizes a classic triple-driver setup with a professional tri-way crossover for precise frequency distribution. A large dynamic driver provides strong low-end performance, while another dynamic driver enhances vocal clarity. High frequencies are managed by a dedicated driver that delivers smooth, detailed sound without harshness. Sound Performance: Aesthetic Balance with Vocal Emphasis The NA3S embodies aesthetic balance with a "listenable balance + vocal prominence" philosophy, offering an engaging listening experience that stands out in its price range. Its clear mid-range captures emotional depth and vocal nuances, making it ideal for novice music producers and singers across various genres. With its excellent cost-performance ratio, the NA3S opens avenues into professional audio monitoring, showcasing the charm of classic sound. Elevated Configuration: Titanium Metal Conduit Technology The NA3S bridges entry-level and professional models, embodying the brand's high-end acoustic DNA with its high-rigidity titanium metal conduit design. This technology leverages titanium's low resonance to effectively reduce cavity noise, while the calibrated conduit length and aperture enhance sound purity and spatial dimensionality. As a result, the NA3S offers a three-dimensional listening experience that excels in its class, accurately reproducing spatial details in recordings. Its lightweight, ergonomic universal mold and superior airtight craftsmanship ensure a stable and comfortable fit for long recording sessions, vocal practice, or daily use. Unlocking Potential: Prelude II Earphone Cable The Prelude II is an upgraded cable designed for the NA Professional S Series, tailored to meet audiophiles' demands for superior sound quality. Its core focus is on enhancing resolution, balance, and sonic purity, maximizing the earphones' potential. Utilizing Litz Type 4S 5N silver-plated copper conductors and a four-braided weaving technique with a standard 4.4mm balanced plug, the Prelude II effectively reduces signal interference. This setup retains rich dynamics while delivering a darker, purer sound. In terms of performance, the Prelude II achieves a precise three-frequency balance, with solid low frequencies and transparent, exquisite highs. This combination offers an immersive listening experience with clear soundstage positioning and detailed musical nuances. Technical Specifications Drivers: 3 Balanced Armature Drivers Crossover: 3-Way 1 Low, 1 Mid, 1 High Impedance: 12 Ohms @ 1 kHz Frequency Response: 20 Hz - 20 kHz Sensitivity: 118 dB @ 1 kHz, 1 mW Packaging Includes: NA3S earphones (Custom) Earphone Cleaning Tool Earphone cotton Mesh Portable earphone Protection Case 3.5mm to 6.35mm Adapter 1.6m 3.5mm Silver-Plated Cable 4.4mm Silver-Plated Upgrade Cable Prelude II