Created: Jul 17 2018 | Updated: Aug 24 2018Use a USB cable to connect the subwoofer's USB Input (Micro-B USB) to a USB (Type A) input on your computer. Using ARC software (available from AnthemAV.com/ARC), choose your subwoofer when asked to select a device. The ARC software should automatically ask if you would like to install an update if one is available. ARC software will download and install the firmware update from MartinLogan servers. You may also manually initiate a firmware update by choosing the option from the software's menu. ARC also offer's the ability to manually select a firmware file if you have one saved on your computer.