If the speaker works with a wired Ethernet connection (via the rear RJ45 port) or Bluetooth, leave the firmware as-is. A failed update due to corrupted server data can permanently brick the device, as recovery mode requires proprietary Pioneer service software no longer available.

Search the AVS Forum (topic: “Pioneer XW-SMA3-K Owners Thread”) for user-hosted copies of the final V2.19 firmware file.