The ADR-9988 model number spans several different performance tiers, each with distinct hardware and firmware requirements: ADR-9988 9" STANDARD Series - Orca Car Audio
Download the specific firmware file for your model (e.g., Standard Series or Eco Lite). Format a USB drive to . firmware orca adr 9988
If OTA is unavailable, you can download patches directly from the Orca Support Page Prepare USB : Use a clean, FAT32-formatted USB drive. Download & Extract firmware orca adr 9988
sudo dmidecode -t firmware | grep -A5 "Orca ADR 9988" firmware orca adr 9988