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TRUTHEAR PURE In-ear Monitor

Finn de Kroon by Finn de Kroon
July 6, 2025
Reading Time: 3 mins read
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TRUTHEAR-PURE-In-ear-Monitor

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The TRUTHEAR PURE in-ear monitor is designed to deliver an exceptional listening experience through meticulously optimized frequency crossover and damping features. By utilizing a customized balanced armature driver akin to the WBFK series for the high-frequency range, PURE enhances the upper high frequency extension. This results in improved resolution and more detailed information delivery in these frequencies, effectively broadening the overall bandwidth for a richer soundscape.

Innovative Hybrid Structure

At the heart of PURE’s performance lies a sophisticated hybrid configuration comprising one dynamic driver and three balanced armature drivers. This combination ensures a well-rounded, three-frequency response that caters to diverse listening preferences.

Dynamic Driver for Deep Bass

The 10mm dynamic driver manages the bass frequencies with precision. It features a mature internal magnetic circuit and employs a copper voice coil an uncommon choice that helps reduce the resonant frequency (F0) and increase impedance. The diaphragm is crafted from silica gel for suspension and LCP material for the dome, ensuring punchy, accurate bass reproduction that meets the demands of precise frequency crossover.

TRUTHEAR-PURE-In-ear-Monitor-2

Mid and High-Frequency Drivers

For mid-range and parts of the high-frequency spectrum, PURE uses a composite full-frequency balanced armature driver. This design is distinct from the HEXA model, optimized to seamlessly connect with the dynamic driver’s frequency band. The high frequencies are further enhanced using a customized balanced armature driver similar to the WBFK series, which extends upper high-frequency response and improves clarity and detail.

Precision Engineering with DLP-3D Printing

The cavity of PURE is manufactured through advanced DLP-3D printing technology, a process typically reserved for high-end multi-driver earphones. Utilizing medical-grade, high-transparency resin with internal coloring and surface grinding, this method produces a lightweight, skin-friendly cavity with exquisite structural accuracy. The nozzle structure incorporates filtering functions, carefully designed to optimize the frequency crossover and damping characteristics, ensuring each driver performs its role effectively.

TRUTHEAR-PURE-In-ear-Monitor-1

Accurate Hybrid Three-Frequency Crossover System

PURE’s innovative design features a high-precision RC frequency crossover system, complemented by the nozzle’s filtering function. This hybrid three-frequency crossover allows each of the four drivers to operate optimally within their designated frequency bands. The result is a natural, balanced sound that closely aligns with the original design intentions, delivering precise and clear audio across all ranges.

Superior Objective Performance

Significant adjustments have been made to components including the frequency divider, damping, cavity, and cable to enhance objective measurements. These modifications reduce resonance peaks in the upper high-frequency range and optimize bass gain, culminating in a natural, versatile sound suitable for monitoring, music, and gaming.

Compared to the HEXA, PURE offers punchier bass, a more solid mid-range, and brighter, more detailed high frequencies. Its high phase consistency across all frequency bands minimizes distortions common in multi-driver earphones, providing a more natural and immersive listening experience.

TRUTHEAR-PURE-In-ear-Monitor-3

Advanced DLP 3D Printing Technology

Manufactured using HeyGears’ DLP-3D printing process, the cavity benefits from high-precision, medical-grade resin with internal coloring and advanced surface finishing. This results in a lightweight, skin-friendly structure that boasts intricate nozzle designs difficult to achieve with traditional manufacturing methods.

Thoughtful Design and User Comfort

The PURE features a design reminiscent of the HEXA, combining square and rounded elements for a sleek aesthetic. Multiple high-precision processing techniques enhance surface textures, and the optimized pressure vent design reduces discomfort during extended wear. The housing size has been minimized without sacrificing reliability, ensuring a comfortable fit for prolonged use.

High-Quality, Versatile Cable

Equipped with a high-quality, oxygen-free copper coaxial cable that is silver-plated, PURE allows users to explore different sound profiles by swapping cables. The universal 0.78mm 2-pin connector ensures broad compatibility and stable connectivity, further enhancing the overall listening experience.

Tags: In-ear MonitorTRUTHEARTRUTHEAR PURE
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Finn de Kroon

Finn de Kroon

I made short movies with my stuffed animals as a kid, since then I knew from a young age I wanted to be a videographer. My parents always said I had a great eye for video/photo, so I made my job out of it. Now I make professional corporate video's. I love to learn all about new gadgets and electronics that come to the market, that's why I write/edit for "Best Of High End".

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