Audioengine D1 32-bit Desktop DAC and Headphone Amp User Manual

1. Introduction and Overview

The Audioengine D1 is a premium 32-bit Digital-to-Analog Converter (DAC) and headphone amplifier designed to enhance your audio experience from computers, gaming consoles, and other digital sources. It provides high-fidelity sound for both headphones and external speakers, making it suitable for various applications including music listening, gaming, and professional audio work.

Key features include:

Dedicated headphone output for private listening.
Analog outputs for connecting to external speakers.
Support for 32-bit, 24-bit, and CD quality audio.
Compact design (4 x 3 inches) for a clutter-free desktop.

2. Setup

Follow these steps to set up your Audioengine D1:

Unpacking: Carefully remove the D1 unit and all accessories from the packaging. Ensure all components are present: D1 unit, USB cable, and any included documentation.
Power and Data Connection: Connect the supplied USB cable from your computer's USB port to the USB/power input on the back of the D1. The D1 is powered via USB, so no external power adapter is needed for computer connections.
Audio Output Connection:
- For Headphones: Plug your headphones into the 3.5mm headphone jack on the front of the D1.
- For External Speakers: Connect the Analog Out (RCA) ports on the back of the D1 to the corresponding inputs on your powered speakers or amplifier using RCA cables (not included).
- For Optical Input: If using an optical source (e.g., TV, gaming console), connect an optical cable (not included) from your source to the Optical In port on the back of the D1.
Driver Installation (Windows/macOS): The Audioengine D1 is a plug-and-play device and typically does not require special drivers for Windows or macOS. Your operating system should automatically recognize the device.
Audio Output Selection: On your computer, navigate to your sound settings and select "Audioengine D1" as the default audio output device.

Front view of the Audioengine D1 DAC with volume knob, power button, and headphone jack. — Figure 2.1: Front view of the Audioengine D1, showing the output level knob, power button, and headphone jack.

Rear view of the Audioengine D1 DAC with analog RCA outputs, optical input, and USB/power input. — Figure 2.2: Rear view of the Audioengine D1, illustrating the various input and output ports.

3. Operating Instructions

The Audioengine D1 is designed for straightforward operation:

Power On/Off: Press the "Power" button on the front panel to turn the unit on or off. The LED indicator will illuminate when the unit is on.
Volume Control: Adjust the "Output Level" knob on the front to control the volume for both the headphone output and the analog RCA outputs.
Input Selection: The D1 automatically detects the active input. If both USB and Optical inputs are connected, the D1 will prioritize the active signal.
Headphone Use: When headphones are plugged into the front jack, the analog RCA outputs will remain active, allowing simultaneous output to headphones and speakers.

Audioengine D1 connected to a laptop on a wooden desk with a coffee mug. — Figure 3.1: The D1 connected to a laptop, demonstrating a typical desktop setup.

Audioengine D1 with headphones and a computer monitor in a desktop setup. — Figure 3.2: The D1 in use with headphones and a computer monitor.

4. Maintenance

To ensure the longevity and optimal performance of your Audioengine D1, follow these maintenance guidelines:

Cleaning: Use a soft, dry cloth to clean the exterior of the D1. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the finish.
Placement: Place the D1 on a stable, flat surface away from direct sunlight, heat sources, and excessive moisture. Ensure adequate ventilation around the unit.
Handling: Handle the unit with care. Avoid dropping it or subjecting it to strong impacts.

5. Troubleshooting

If you encounter issues with your Audioengine D1, refer to the following common troubleshooting tips:

Problem	Possible Cause / Solution
No sound output.	Ensure the D1 is powered on (LED indicator is lit). Check all cable connections (USB, RCA, Optical, Headphone) are secure. Verify "Audioengine D1" is selected as the default audio output device in your computer's sound settings. Increase the "Output Level" knob on the D1 and your computer's volume. If using optical input, ensure the source device is outputting audio via optical.
Sound is distorted or low quality.	Check the audio source quality. Ensure the D1's volume is not set too high, causing clipping. Verify that your computer's sound settings (e.g., sample rate, bit depth) are compatible with the D1's capabilities (up to 32-bit). Try restarting your computer and the D1.
Unit not recognized by computer.	Try connecting the D1 to a different USB port on your computer. Ensure the USB cable is not faulty. Restart your computer. Check your computer's Device Manager (Windows) or System Information (macOS) to see if the D1 is listed.

6. Specifications

Feature	Detail
Model Number	D1
Brand	Audioengine
Product Dimensions	1.48 x 1.38 x 0.39 inches
Item Weight	5 ounces
Interface Type	USB
Mounting Type	Table Top
First Available Date	December 6, 2011

7. Warranty and Support

Audioengine products typically come with a limited warranty. For specific warranty terms and conditions, please refer to the documentation included with your product or visit the official Audioengine website.

For technical support, troubleshooting assistance beyond this manual, or warranty claims, please contact Audioengine customer support through their official channels. You may also find additional resources and FAQs on the Audioengine Store on Amazon.

An official Installation Manual (PDF) is also available for download: Download Installation Manual.

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Audioengine D1