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Although the K4’s 4-inch driver resembles those of other brands in appearance, significant enhancements have been made specifically for the K4. These include the thickness and material selection of the diaphragm, a specially designed suspension edge, and an aluminum frame surrounding the unit. Additionally, the driver’s magnet is enclosed by a metal cover with four extra screw mounting points—totaling eight screws securing the assembly. These improvements are not merely for aesthetics but are carefully engineered to optimize the performance of the 4-inch driver, strengthening the speaker’s overall capability step by step.

Taiwanese Design, Pragmatic Excellence: The Birth of the Lotton Electronics X-5 Tube Amplifier

The Taiwanese brand Lotton has been distributing Bozhiyun’s tube amplifier kits from Mainland China in Taiwan for over a decade. Thanks to affordability and strong word-of-mouth, Lotton has achieved notable sales success on DIY audio forums, despite minimal exposure in mainstream media.

This success inspired Mr. Zhang Jianxiang of Lotton to embark on designing an amplifier of his own. Leveraging consumer feedback and decades of solid fundamentals in electronics, he avoided blind faith in high-end audiophile components and instead focused on creating the most rational circuit design. The result is the X-5 tube amplifier, a product of thoughtful engineering and practical innovation.