1DD + 3BA HYBRID STUCTURE
The PURE high-performance in-ear monitors feature one dynamic driver and three balanced armature drivers.
Utilizing a silicone suspension composite with a liquid crystal dome diaphragm and an N52 rubidium magnet dual-cavity internal magnetic circuit dynamic driver.
Using a DLP-3D printing process for the cavity, a technique typically used for high-end multi-driver products and custom earphones. Equipped with a newly designed copper silver-plated coaxial cable。Offering superior objective measurements
Efficient & Practical Driver Configuration
Similar to the HEXA, PURE includes one dynamic driver and three balanced armature drivers. The design aims to align with the tuning target curve of the most advanced HATS by making adjustments based on HEXA’s design experience and feedback from audio professionals.
By incorporating a simple yet effective configuration, PURE strives to deliver a high-quality hybrid earphone with a well-defined three-frequency response at a reasonable price.
A specialized dynamic driver with a diameter of 10mm is responsible for managing the bass range. It features a mature internal magnetic circuit structure paired with a diaphragm made from silica gel (for suspension) and LCP material (for the dome). Unlike the commonly used copper-clad aluminum found in many dynamic drivers for bass, this model employs a specialized copper voice coil. This choice helps to reduce its natural resonant frequency (F0) and appropriately increase its impedance, allowing for punchy bass that meets the demands of accurate frequency crossover.
For mid frequencies and part of the high range, a composite full-frequency balanced armature driver, distinct from the HEXA model, is utilized. This driver is designed to establish an accurate connection with the frequency band of the specialized dynamic driver, ensuring that the high frequencies align closely with the intended design goals based on HRTF characteristics measured by BK5128 HATS.
PURE optimizes the frequency crossover and damping characteristics. By using a customized balanced armature driver similar to the WBFK series for the high-frequency range, it enhances the upper high frequency extension and improves both resolution and information delivery for these frequencies, while also supplementing the overall bandwidth.
Accurate Hybrid Three-Frequency Crossover
The nozzle structure of PURE, which incorporates a filtering function, is created using high-precision DLP-3D printing technology. This design, combined with an accurately calculated RC frequency crossover, results in a hybrid three-frequency crossover system that allows each of the four drivers to effectively perform its designated role under different corresponding nozzles. This advancement helps bring the objective measurements of the PURE closer to the intended design goals.
Superior Objective Measurements
PURE has made significant adjustments to various components of the audio system, including the frequency divider, drivers, damping, cavity, and cable. These modifications aim to reduce the Q value of the resonance peak in the upper high-frequency range while also optimizing bass gain for a better listening experience.
PURE delivers a solid, natural sound that is versatile enough for various applications, including monitoring, music, and gaming. Compared to the HEXA, it features punchier bass, a more solid mid-range, and enhanced brightness and detail in the high frequencies, leading to a well-balanced proportion and timbre across all three frequency bands.
Like other multi-driver products from Truthear, the PURE maintains high phase consistency across all frequency bands. This design eliminates connection issues that often plague standard multi-driver earphones, ensuring a more natural listening experience without the distortions caused by phase discrepancies.
Classic DLP 3D Printing Technology
DLP 3D printing cavity, from HeyGears, utilizes medical-grade, high-transparency resin, featuring internal coloring and advanced surface grinding technology. This ensures enhanced printing accuracy and efficiency. The design achieves an exquisite sound nozzle structure that is challenging to produce with traditional methods, resulting in a lightweight cavity made from skin-friendly and reliable materials.
Reliable ID Design
The PURE mirrors the design of the HEXA, showcasing a combination of square and rounded shapes. It employs multiple high-precision processing techniques to enhance the surface textures of various components, improving the overall aesthetic. Additionally, the pressure vent design has been optimized, and the housing size has been minimized while maintaining reliable wearability, thereby reducing discomfort during prolonged use.
High-quality Cable Stable Extensibility
PURE features a high-quality copper coaxial cable that is oxygen-free and silver-plated, tailored to the tuning style, and incorporates a universal 0.78 2Pin port (0.78 2Pin sunken female socket). This design facilitates outstanding sound quality and allows users to explore endless possibilities by swapping cables.
Driver: 1 x Dynamic Driver + 3 x Balanced Armature Drivers
Diaphragm: Silicone Suspension + LCP Dome Composite Diaphragm
Impedance: 13.8Ω±15% @1kHz
Sensitivity: 124dB/Vrms @1kHz
Total Harmonic Distortion: THD≤1% @1kHz (94dB)
Frequency Response Range: 7-40kHz (IEC61094, Free Field)
Effective Frequency Response Range: 20-20kHz (IEC60318-4, -3dB)
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