final E4000 Headphones with MMCX Connectors and Detachable Cable In-Ear (3.5mm Jack)

---------------------------------------------------------------------- 【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. ---------------------------------------------------------------------- Sound Design Based on Acoustic Engineering and Psychology: The sound quality design was based on the latest research findings in acoustic engineering and psychology. While the common sound design technique of creating a sharp peak in the high frequencies and emphasizing certain parts may create a vivid sound at first listen, this peak can mask and obscure the surrounding frequency ranges. The E-series achieves high resolution by smoothing the overall frequency response curve, preventing masking. Compared to the E3000/E2000, it delivers a purer, more delicate sound with less coloration. To enhance resolution across all frequency ranges, the sound pressure is kept low. While it may sound subdued at first listen, gradually increasing the sound pressure while appreciating its delicacy will create a pleasant listening experience. This is a product whose qualities become more apparent the longer you use it. The acoustic chamber is key to low-frequency tuning: The internal housing on the back of the driver unit contains an acoustic resistor that controls the characteristics of the mid-low frequencies, which determine the backbone of the sound quality. Beyond that is an L-shaped space that is crucial for tuning, achieving both a sense of volume and clarity in the bass. MMCX Connector + Original OFC Cable: The MMCX connector is our own proprietary design. The cable uses a soft and flexible sheathing material to minimize touch noise. It bends flexibly even when using ear hooks, ensuring a comfortable fit. High-rigidity aluminum machined housing: The aluminum machined and anodized housing provides stronger support for the driver unit and suppresses unwanted vibrations compared to resin housings. Its simple form and texture make it suitable as an everyday tool for adults, and its design aligns well with its classic sound quality. Re-cable compatible design: Equipped with MMCX connectors, you can easily replace the cable with your preferred one. This offers high customizability and ensures long-term use. Based on the latest research findings in acoustic engineering and psychoacoustics, this audio system delivers clear sound across the entire frequency range, creating a realistic and immersive listening experience.