Denon DRA 425R Receiver Manual

The Denon DRA 425R is a high-performance stereo receiver designed for audiophiles who demand superior sound quality and versatility. With a power output of 70 watts per channel, it supports a variety of audio formats and features multiple input options, including phono, CD, and auxiliary inputs. The receiver also includes AM/FM radio with preset stations, tone control, and a headphone jack for private listening. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: AM/FM tuner, multiple audio inputs, tone control, headphone jack, remote control.

Installation

Unpack and inspect contents. Place on a stable surface.

1. Connect speakers: Use speaker wire to connect to the speaker outputs.
2. Connect audio sources: Use RCA cables for CD, phono, and auxiliary inputs.
3. Plug into AC power.

WARNING! Receiver is heavy; lift with care to avoid injury. Ensure all connections are secure.

First-Time Setup

Power on the receiver; follow on-screen prompts.

1. Program radio stations: Use the tuning buttons to find and save stations.
2. Set audio preferences: Adjust tone settings using the remote control.
3. Connect to external devices: Ensure all connections are secure and powered on.

CAUTION! Ensure stable surface; use two people for handling if necessary.

Specifications

• Power Output: 70 watts per channel.
• Audio Inputs: Phono, CD, Auxiliary.
• Tuner: AM/FM with preset stations.
• Speaker Outputs: Connect up to 2 pairs of speakers.
• Dimensions: 17.1 x 5.9 x 13.4 inches.
• Weight: 20.5 lbs.
• Power Consumption: 150 watts.

Controls and Settings

Access settings via the front panel or remote control. Key controls include power, volume, input selection, and tone adjustments.

Remote: Power, volume, input selection, preset station buttons.

Audio settings: Adjust bass, treble, and balance. Set speaker configuration and input preferences.

Connecting Devices

Connect various audio sources using RCA cables. Ensure all devices are powered off before connecting.

1. Turn off the receiver and devices before connecting.
2. Match cables to ports (e.g., RCA to CD input).
3. Select input via the remote control.

Tip: Ensure all connections are secure to avoid audio issues.

Playing Audio Media

Supports various audio formats including CDs and vinyl records.

1. Insert disc: Load CD into the tray.
2. Play: Press PLAY; select tracks using numeric buttons.
3. Stop: Press STOP to pause playback.
4. Skip: Use PREV/NEXT for tracks.
5. Adjust volume: Use the volume control on the receiver or remote.

WARNING! Do not force discs; handle with care.

Accessibility Features

Remote control allows for easy access to all functions, including volume adjustments and input selection.

Care & Cleaning

Unplug before cleaning. Use a dry cloth only; avoid liquids or aerosols.

CAUTION! Do not spray liquids; keep away from heat and moisture.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © 2026 Denon; trademarks of Denon Electronics.

Troubleshooting

Reset: Menu > System > Reset if available.

Service: Contact Denon support for assistance.