Recent firmware versions (U38.3 / U39) have introduced significant enhancements:
If your home theater lacks a reliable network connection, you can flash the firmware using a USB drive. Go to the official Denon upgrade website on your computer.
Recent firmware versions (e.g., U38 and U39) have introduced several major upgrades: denon avr update firmware new
Refinements to the popular room calibration software for more accurate sound reproduction.
If you experience erratic behavior or bugs after an update, perform a factory reset (usually done by holding specific front panel buttons, which vary by model). Be aware this will erase your Audyssey room correction calibrations and saved settings. Stay Connected and Optimized Recent firmware versions (U38
If your home theater room lacks internet access, or if the network update repeatedly fails, you can apply the update via a USB drive.
Copy the extracted folder/files directly to the of your USB drive (do not hide them inside another folder). Step 4: Install on the AVR Turn off the Denon AVR. Insert the USB drive into the front-panel USB port. If you experience erratic behavior or bugs after
Turn on the AVR, press on the remote, and navigate to General > Firmware > Update > USB Update . Follow the on-screen prompts to execute the update. Configuring Automatic Firmware Updates