New, Unused Unopened, in the condition it was when purchased. This is the Audio-Technica professional monitor headphone "ATH-M40". The successor model, "ATH-M40x," is now the mainstream. The ATH-M40x is also a monitor headphone suitable for studio tracking, mixing, and DJ monitoring. The biggest difference between the ATH-M40 and ATH-M40x is mainly that the cable is detachable. The M40x was released in 2014 as the successor to the M40, and the performance is almost the same except for the cable. This original ATH-M40 product is a rare item, as production has already ended. Main Features (ATH-M40x) Sound Quality: Achieves a flat playback sound without coloration over a wide frequency range, enabling accurate monitoring. Sound Isolation: The oval earcups ensure excellent sound isolation, providing comfort even during long hours of use. Durability: Durable materials are used for the ear pads and head pads, resulting in a robust construction. Convenience: Features a 90-degree rotating monitor mechanism and a folding mechanism for easy portability. Two types of detachable cords (a coiled cord and a straight cord) are included. The box has some stains as shown in the photos due to aging. Common Features of ATH-M40 and M40x Except for the cable specifications and some design changes, the ATH-M40 and M40x share many common features. Sound Characteristics: Both models feature a monitor sound faithful to the original sound. They achieve a flat sound balance without emphasizing specific frequency bands, making them suitable for mixing and monitoring in professional settings. Drivers: Equipped with 40mm dynamic drivers. Sound Isolation: Features a closed-back design that achieves high sound isolation. Portability: Both models can be folded, making them easy to store and carry. *The cable of the ATH-M40 is not detachable.