ZERO:BLUE2 features a dual-cavity internal magnetic circuit dynamic drivers design, incorporating a 10mm solid silica gel suspension composite liquid crystal dome with an N52 magnet and a 7.8mm upgraded polyurethane suspension liquid crystal dome with an N55 magnet.
Utilizing a DLP-3D printing process for the cavity and a silicone capping technique, these methods are typically reserved for high-end multi-driver products and custom earphones.
ZERO:BLUE2 is equipped with a newly designed copper silver-plated coaxial cable.
Like its predecessors in the ZERO series, the ZERO:BLUE2 features dual dynamic drivers. However, the structure of the 7.8mm dynamic driver has been modified, focusing on mid and high frequencies. This driver utilizes a mature internal magnetic circuit structure, incorporating flexible polyurethane material for suspension and an LCP (liquid crystal polymer) dome diaphragm. Despite these similarities, the internal design is quite different from earlier models.
We have achieved a significant breakthrough by increasing the diameter of the magnet for the 7.8mm driver by approximately 25%. Additionally, we expanded the dome area by about 50% and improved the high-frequency conductive structure. Although these changes make the production and processing of this dynamic driver more challenging, they enhance conversion efficiency and greatly improve sensitivity in the upper high frequencies. This advancement not only meets our R&D needs but also results in objectively superior measurements, yielding a smooth, transparent high-frequency response with enhanced extension and excellent resolution.
Furthermore, the 10mm dynamic driver, which handles the bass frequencies, has also received an upgrade. The newly adjusted solid silicone suspension aligns with the liquid crystal dome diaphragm and features an ultra-thin wire diameter voice coil, creating a brand-new bass tuning system. This system employs a low-distortion frequency crossover design similar to that of the ZERO:RED, resulting in significantly improved objective measurements, such as lower nonlinear distortion compared to the original ZERO. As a result, users can expect deeper and punchier bass performance.
We have redesigned the cavity structure and low-distortion frequency crossover circuit based on valuable experience and user feedback from previous models featuring double dynamic drivers. This redesign aims to enhance the dynamic drivers' conversion efficiency while allowing each speaker to fulfill its respective role. As a result, we have significantly improved sensitivity. The filtered nozzle, accurately printed by HeyGears using high-precision 3D-DLP technology, works in conjunction with a mixed multiple frequency crossover, bringing the objective measurements of the ZERO:BLUE2 closer to the intended design goals.
The R&D goal of ZERO:BLUE2 marks a departure from previous TRUTHEAR products. Our aim is to enhance overall conversion efficiency while maintaining excellent performance in both linear and nonlinear distortion.
Non-linear distortion: ZERO:BLUE2 not only meets our anticipated R&D objectives but also outperforms RED in certain frequency ranges regarding non-linear distortion. It delivers a clean background and effectively restores details, allowing for accurate reproduction of musical timbre.
Linear distortion: The frequency response curve targeted by ZERO:BLUE2 is designed to align more closely with public preference characteristics. We have optimized the low bass response (below 50Hz) through various means, ensuring a smoother transition in the mid frequency. The high frequency are closely matched to the amplitude response characteristics of HRTF, maintaining high sensitivity above 10000Hz.
These enhancements have significantly optimized ZERO:BLUE2 compared to the performance metrics of ZERO. In terms of subjective listening experience, it offers a more dynamic and vivid sound than RED, with excellent high-frequency conversion efficiency that reveals the subtle details in recording and mixing processes.
Additionally, ZERO:BLUE2 features highly consistent full-band phase characteristics, effectively eliminating the unnatural listening experience often caused by phase distortion.
The shell of the ZERO:BLUE2 continues to benefit from high-quality 3D-DLP services provided by the reliable brand, HeyGears. The new model inherits the design of the original ZERO but features a redesigned faceplate, offering users a fresh visual experience. Thanks to the optimized DLP 3D-printed resin material, we have managed to reduce the local material thickness within the cavity while maintaining impressive structural durability. Additionally, we have optimized the nozzle size and adjusted the support angles, improving the overall comfort of the ZERO:BLUE2. This results in a lightweight and skin-friendly cavity that makes it more suitable for long-term wear.
The ZERO:BLUE2 incorporates a 0.78mm 2-pin design and comes with an upgraded two-strand high-quality copper and silver-plated coaxial cable. The number of internal wires has been increased further, enhancing sound performance and providing a tangle-free experience.
Moreover, it offers a microphone option that includes not only the two-strand high-quality copper and silver-plated coaxial cable with a 3.5mm single-ended 0.78mm 2-pin connection, but also features an oxygen-free copper mic cable of exceptional quality (same as the mic cable used in the GATE). This makes the ZERO:BLUE2 not just an excellent companion for music and monitoring, but also a reliable assistant for calls and gaming.
Name: TRUTHEAR ZERO:BLUE2
Driver: 10mm + 7.8mm Dynamic Driver
Diaphragm: Silicone Suspension LCP Liquid Crystal + Polyurethane Suspension LCP Lquid Crystal Composite Diaphragm
Impedance: 5.8Ω±15% @1KHz
Sensitivity: 119.5dB/Vrms @1KHz
THD: <1% @1khz
Frequency Response Range: 20-41kHz (IEC61094, Free Field)
Effective Frequency Response Range: 20-20kHz (IEC60318-4, -3dB)
1. TRUTHEAR [ZERO:BLUE2] * 1
2. 3.5mm Standard Cable * 1
3. 3.5mm Mic Cable * 1 (Optional)
4. Eartips * 3 Pairs (S, M, L)
5. Foam Eartips * 3 Pairs (M)
6. Foam Eartips * 1 Pair (S)
7. 5Ω Impedance Adapter* 1
8. User Manual * 1
9. Warranty Card * 1
10. Anime Card * 1
