This is a custom-made headphone cable from Bispa, the Omomuki/Kizashi model. It features a high-quality custom cable with an aeco 6.3mm gold-plated plug on the amplifier side and a 2.5mm locking connector on the headphone side. The locking mechanism reduces the likelihood of poor contact, ensuring reliable use. The sound quality emphasizes balance, with a natural connection from low to high frequencies, and an improved sense of imaging, resolution, and soundstage. It has a monitor-like quality with minimal coloration, making it a versatile cable suitable for various genres. It has been aged for approximately 200 hours, so you can enjoy its original sound quality immediately after purchase. Compatible models (examples): Austrian Audio Hi-X60 / Hi-X65 Audio-Technica ATH-M50x Sennheiser HD620S / HD595 / HD598 / HD599 / HD558 / HD518 / MOMENTAM4 D1200 BOSE QC25 Ultrasone Signature Pro, etc. ※The above are examples of models that have been used (the list is for reference only). Please feel free to comment if you have any questions.