⚠️ Note: “Denon UDM3” does not appear in official Denon model lists. It may be a misspelling of , UD-M33 , or a regional variant. If you have a different physical unit, please check the rear label for the exact model number (e.g., UD-M30, D-M33, RCD-M39).
The UDM3 uses an internal ferrite bar antenna for AM. Rotate the entire unit for best reception. The manual explicitly states: Do not place the unit near a TV or computer as they cause AM buzz. denon udm3 manual user manual top