MEE audio Universal MMCX 2.5mm Balanced Audio Cable with 3.5mm Balanced, 4.4mm Balanced, and 3.5mm S | Reverb France
Amazon.com: GUCraftsman 2.5mm Balanced Male to 4.4mm Balanced Female Portable Headphone Adapter Cable 6N Single Crystal Silver Headphone Jack Convert Cable for Audio Players with 2.5mm Balanced Ports : Electronics