Liquefy gene Circle pxc 550 buttons Th Senator history
PXC 550-II Instruction manual
Sennheiser PXC 550 Noise Canceling Bluetooth Headphones | Stereophile.com
PXC550 won't hold >20% charge and runs out quickly. Cracked the case to check buttons and found an extra 'music' button. Anyone else had this issue? : r/sennheiser