Denon AH-D400 Manual

The Denon AH-D400 is a premium over-ear headphone designed for audiophiles seeking high-quality sound and comfort. Featuring advanced audio technology, these headphones deliver rich, detailed sound across a wide frequency range. The ergonomic design ensures a comfortable fit for extended listening sessions, while the durable materials provide longevity. Below are key sections for features, specifications, setup, operation, and troubleshooting.

Features at a Glance

Key components: Over-ear design, high-performance drivers, detachable cable, adjustable headband, and soft ear pads for comfort.

Feature	Description
Over-ear design	Provides excellent sound isolation and comfort
High-performance drivers	Delivers clear and powerful audio
Detachable cable	Allows for easy replacement and storage
Adjustable headband	Ensures a secure and comfortable fit
Soft ear pads	Enhances comfort during long listening sessions

Setup

Unbox and inspect the headphones. Ensure all components are included.

1. Connect the audio cable: Plug one end into the headphones and the other into your audio source.
2. Adjust the headband: Fit the headphones comfortably on your head.
3. Power on your audio device: Ensure it is set to the correct output.

WARNING! Avoid exposing the headphones to extreme temperatures or moisture.

First-Time Use

Power on your audio device and start playing music.

1. Adjust volume: Use the volume control on your audio device.
2. Test sound quality: Play different genres to evaluate performance.
3. Make adjustments: Use equalizer settings if available for optimal sound.

CAUTION! Start with low volume to avoid damaging your hearing.

Specifications

• Driver Size: 40mm.
• Frequency Response: 5Hz - 40kHz.
• Impedance: 32 ohms.
• Sensitivity: 105 dB/mW.
• Weight: 250 grams.
• Cable Length: 1.2 meters.
• Connector: 3.5mm audio jack.

Controls and Settings

Volume control is managed through your audio device. The headphones feature a simple design with no additional controls.

Tip: Use the equalizer settings on your device for enhanced audio performance.

Connecting Devices

Compatible with a variety of devices including smartphones, tablets, and computers.

1. Ensure the device is powered off before connecting.
2. Use the appropriate cable for your device.
3. Power on the device and select the audio output.

Tip: For best results, use a high-quality audio source.

Listening to Music

Enjoy your favorite music with high-fidelity sound.

1. Insert the audio cable into the headphone jack.
2. Play your music and adjust the volume as needed.
3. Explore different genres to experience the sound quality.

WARNING! Avoid listening at high volumes for extended periods.

Accessibility Features

The Denon AH-D400 headphones are designed for comfort and ease of use, making them accessible for all users.

Care & Cleaning

To maintain the headphones, use a dry cloth for cleaning. Avoid using liquids or aerosols.

CAUTION! Do not expose to moisture or extreme temperatures.

Regulatory Information

Complies with FCC regulations for electronic devices. For support, visit www.denon.com or contact customer service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Connection issue	Check cable connections and ensure device is powered on.
Poor sound quality	Audio source	Try a different audio source or adjust equalizer settings.
Headphones not fitting	Improper adjustment	Adjust the headband for a better fit.
Cable damage	Wear and tear	Replace the cable if damaged.

Reset: Disconnect and reconnect the headphones to reset.

Service: For support, contact Denon customer service.