4.4 TRRRS Connector - #11 by wizardofoz - Audio Gear Talk - Roon Labs Community
4-pin XLR Balanced to 4.4mm Pentaconn Balanced Adapter - YouTube
Ablet 4.4MM Male to 2.5mm Trrs Female Balanced Cable, Headphone Audio Adapter for SONY WM1A/1Z, PHA-2A and Astell&kern Layla, Astell&Kern Rosie, Astell&kern Roxanne II, Astell&Kern AK T8iE MKII: Amazon.co.uk: Electronics & Photo