The Denon AVR-391 is a versatile 5.1-channel AV receiver that delivers high-quality audio and video performance. It supports various audio formats, including Dolby TrueHD and DTS-HD Master Audio, and features multiple HDMI inputs for connecting various devices. The receiver also includes built-in AM/FM radio, a user-friendly interface, and advanced audio calibration technology to optimize sound in any room. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.
Key components: 5.1-channel audio output, multiple HDMI inputs, AM/FM tuner, advanced audio calibration, and user-friendly interface.
| Feature | Description |
|---|---|
| HDMI Inputs | Multiple inputs for connecting Blu-ray players, gaming consoles, and more. |
| Audio Formats | Supports Dolby TrueHD, DTS-HD Master Audio, and more. |
| AM/FM Tuner | Built-in tuner for radio listening. |
| Calibration Technology | Automatically adjusts audio settings for optimal sound. |
| Remote Control | Convenient remote for easy operation. |
| Speaker Setup | Flexible speaker configuration options. |
| Power Output | High power output for immersive sound experience. |
Unpack and inspect contents. Place the receiver on a stable surface.
WARNING! Ensure all connections are secure to avoid damage.
Power on the receiver; follow on-screen prompts for initial setup.
CAUTION! Ensure stable surface; avoid blocking ventilation.
Access settings via the on-screen display (OSD) or front panel controls.
Remote: POWER, INPUT, VOLUME, TUNING, MENU, and more.
Audio settings: Adjust bass, treble, balance, and surround sound options.
Connect devices using HDMI, optical, or analog audio inputs.
Tip: Ensure all devices are powered off before making connections.
Supports various audio formats including MP3, WAV, and more.
WARNING! Do not force connections; ensure compatibility.
Closed Captions: Enable in the settings menu for compatible media.
Unplug before cleaning. Use a dry cloth only; avoid liquids.
CAUTION! Do not spray liquids; keep away from heat and moisture.
FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © 2026 Denon; trademarks of Denon Electronics.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Remote does not work | Obstacles/batteries | Remove obstacles; point at IR sensor; install fresh batteries. |
| No sound | Connections/mute | Ensure receiver is on; check connections; adjust mute. |
| Picture not clear | Settings | Adjust video settings in the menu. |
| Channels not programming | Antenna/menu | Use auto-program in menu; ensure antenna connected. |
| Device not recognized | Connection issue | Check cables and connections; restart devices. |
Reset: Menu > System > Reset if available.
Service: 1-800-ABC-DEF; www.denon.com