D1P Headphone Amplifier & DAC — Audioengine Skip to Content
Tech Specs

D1P 32 Bit Portable Headphone Amplifier & DAC

Tired of mediocre sound from your devices? Meet the D1P, Audioengine's all-in-one solution for crystal-clear audio. This portable, yet compact headphone amplifier and DAC bypasses your device's internal audio systems, ensuring premium sound quality from streaming platforms like Tidal or Apple Music. Compatible with iOS, Android, MacOS, & Windows, it's power-efficient yet powerful enough to drive audiophile-grade headphones or speakers without batteries. Elevate your listening experience with the D1P, where dynamic, rich sound meets convenience and versatility.
Quickstart Guide

Technical Specifications

General specifications

DAC Chip:

SA9312+ES9219C

Input bit depth:

Up to 32 bits

Input sample rate (USB):

PCM Max. 32bit 384KHz, Max 24bit 192KHz

DSD Support:

DSD 64, 128 (DOP), DSD 256 (Native)

MQA Rerender:

8X

USB device class:

UAC 2.0

Inputs:

USB Type-C

S/PDIF Optical (Max 24bit 192KHz)

Toggle Switch for input selection

Outputs:

Standard 3.5mm headphone port for headphones and headsets

RCA

SPDIF

Full-scale output level:

Max. 2.05Vrms @ 10K default

Output impedance:

<0.5R @ Headphone, 47R @ RCA

Recommended headphone impedance range:

10 Ohms ~ 600 Ohms

Frequency Response:

20Hz-40KHz +/-0.1dB

Signal-to-Noise Ratio (SNR):

121dB (10K）

Power Requirement:

USB 5V DC

Consumption:

~102mA (normal), ~121mA (with pink noise at 50% volume, 32bit 384Khz)

Indicators:

  • White: power/connected
  • Green: PCM 88.2-192kHz / DSD64
  • Blue: PCM 352.8-384kHz / DSD128
  • Purple: MQA
  • Green: Optical

Product dimensions

3.0" (7.62 cm) x 2.5" (6.35 cm) x 1" (2.5 cm)

Shipping weight
13.7 oz (0.39kg)

Environmental
Operating Temperature: 32 to 95 degrees F
Non-operating Temp: -4 to 113 degrees F
Relative Humidity: 5% to 95% non-condensing

Included Accessories:

  • USB-C cable
  • Lighning Cable
  • Setup guide
  • Microfiber bag

Quickstart Guide

D1P QuickStart Guide
D1P_quickstart_guide_Download

Troubleshooting

D1P Troubleshooting Tips

The following troubleshooting tips can help diagnose and correct most concerns with the D1. We have attempted to make this list as comprehensive as possible. So, even though some of these may not apply to your issue, please still go through each one.

  1. Restart your device and make sure the OS and all related apps are up-to-date.
  2. Make sure the USB cable and audio cable connections to and from the D1P are complete, and verify that these cables are in working order by unplugging the cables and then reconnecting.  Try using the included USB cable if you are not already. If you’re using an Apple source with Lightning port, make sure the adapter cable is a certified Apple cable. 
  3. Remove all other USB devices temporarily from your computer to see how this affects the D1P playback.  Audio over USB and bus powering a device can both be somewhat demanding.  USB ports can share a bus internally and can also share their bus with devices internally as well.  Because of this, some ports may not perform as well as others, so be sure to try each USB port one at a time.
  4. If using Windows, uninstall the USB driver from your computer.  Then disconnect the USB cable to remove the D1Pfrom your computer and plug it back in to allow the driver to reinstall automatically.  You can find complete instructions from Microsoft on how to reinstall a plug-and-play device under Windows here.
  5. If you are using an intel-based Mac, try a NVRAM/PRAM reset.  This resets the system configurations for some audio and video related things and can many times help clear up problems related to audio.  See Apple’s support page for information on how to do this. Also, be sure to check the App store to see if there's a newer version of Mac OS you could be running.
  6. Try music with different bit depths and sample rates.  On a Mac these settings are under Applications --> Utilities --> Audio MIDI Setup.  Try using both 16-bit as well as 24-bit settings.
  7. Experiment with using a different media player (iTunes, Songbird, Win Amp, Cog, etc.) and different audio file types (MP3, ALAC, FLAC, etc.).  And if your media library is located on an external drive or network attached storage (NAS), try playing audio files on your internal local hard-drive.
  8. When using the optical input on your D1P, be sure that your source device (computer, TV, CD/DVD player, etc.) is set to PCM Stereo output and not Dolby Digital or DTS.
  9. If you are using a wireless device with D1P, temporarily remove the wireless adapter from the setup and connect the D1P directly to the audio source.
  10. If possible, try your D1P with a different device to see if something is causing an issue in the current setup.

FAQ's

Using Third-Party Software

  1. Audirvana:
    • Audirvana is a high-quality audio player for macOS that automatically switches the sample rate to match the source audio.
    • It provides a direct mode that bypasses macOS's audio processing, allowing for bit-perfect playback.
    • To use Audirvana:
      1. Download and install Audirvana from the official website.
      2. Open Audirvana and go to the preferences.
      3. Ensure the option to automatically adjust the sample rate is enabled.
  2. Roon:
    • Roon is another powerful music player and library manager that supports automatic sample rate switching.
    • It offers advanced features for managing your music collection and provides high-quality playback.
    • To use Roon:
      1. Download and install Roon from the official website.
      2. Open Roon and go to the settings.
      3. In the audio settings, configure your DAC as a zone and ensure it is set to automatically adjust the sample rate.
  3. BitPerfect:
    • BitPerfect is a simple and affordable app that integrates with iTunes (Music app) to ensure bit-perfect playback, including automatic sample rate switching.
    • To use BitPerfect:
      1. Download and install BitPerfect from the Mac App Store.
      2. Open BitPerfect and configure it to work with your preferred audio output device.
      3. Ensure that automatic sample rate switching is enabled in the settings.

For Windows

To configure your Windows PC to automatically switch the indicator color on your D1P or DAC3 based on the sample rate of the audio file being played, you can use specialized audio playback software that supports this feature. Here are a few options:

Using foobar2000 with WASAPI or ASIO Plugins

foobar2000 is a popular and highly customizable audio player for Windows that can be configured to use WASAPI or ASIO for bit-perfect playback, which allows automatic sample rate switching.

  1. Download and Install foobar2000:
  2. Install WASAPI or ASIO Plugin:
    • Download the WASAPI component or ASIO component from the foobar2000 components page.
    • Install the component by dragging the downloaded file into the foobar2000 Components window (File > Preferences > Components).
  3. Configure Output:
    • Go to File > Preferences > Playback > Output.
    • Select your DAC under the WASAPI or ASIO output device.
  4. Enable Bit-Perfect Playback:
    • Ensure that your DAC is set to "Event" or "Push" mode (for WASAPI) or the correct ASIO driver.
    • This configuration will allow foobar2000 to automatically switch the sample rate based on the source material.

Using JRiver Media Center

JRiver Media Center is another powerful media player that supports automatic sample rate switching.

  1. Download and Install JRiver Media Center:
  2. Configure Output Mode:
    • Go to Tools > Options > Audio.
    • Select your DAC as the audio device.
    • Under Settings, choose "WASAPI" or "ASIO" as the output mode.
  3. Set Automatic Sample Rate Switching:
    • In the Audio settings, go to "DSP & output format".
    • Ensure "Output Format" is checked, then set the sample rate to "Source Sample Rate" or "No Change" to enable automatic switching based on the source file.

Using Roon

Roon is a premium music player with extensive support for high-resolution audio and automatic sample rate switching.

  1. Download and Install Roon:
  2. Configure Audio Device:
    • Go to Settings > Audio.
    • Enable your DAC as an output device.
  3. Set Up Playback:
    • Ensure that the sample rate conversion settings are set to "Source Sample Rate" to allow Roon to automatically adjust the sample rate.

Using specialized audio playback software like foobar2000, JRiver Media Center, or Roon can help you achieve automatic sample rate switching on your Windows PC, allowing your DAC to read and display the correct sample rate based on the audio file being played. These applications provide bit-perfect playback and ensure that your DAC receives the correct sample rate without manual configuration.

Audioengine operates two websites, audioengine.com and audioengineeu.com. If you go to any other site but these, they are not an Audioengine site. For Canada, Mexico and most of Europe and the UK, we only sell through Amazon. There are also a host of authorized retailers and sites across the US, and they can be found here. For international sales, we have distributors that operate independently, and they can be found here. 

What happens if I buy from an authorized site claiming to be Audioengine? Unfortunately, there is not much we can do. We are taking all the action we can to make sure those sites don't get indexed, but we recommend you work with the provider of the card you used to make payment to get your money back.

Step-by-Step Guide

  1. Open Terminal:
    • You can find Terminal in your Applications folder under Utilities, or you can use Spotlight by pressing Cmd + Space and typing "Terminal".
  2. Execute the Command:
    • In the Terminal window, type the following command and press Enter:

bash

Copy code

sudo pkill bluetoothd

  1. Enter Your Password:
    • After pressing Enter, you will be prompted to enter your password. Type your Mac's administrator password and press Enter.
    • Note that when you type your password, it won't be displayed on the screen (not even as asterisks). Just type it and press Enter.

By following these steps, you should be able to reset your Bluetooth service on your Mac, which can help resolve connectivity issues with your Audioengine devices or any other Bluetooth peripherals.

All Optical audio is considered a "fixed" output, meaning volume will not attenuate from the TV remote. If you have an HD5/HD6 you can use the Audioengine remote for this. Fo

We take great pride in our products, and go through great lengths to ensure consistency and quality. For that reason, this item was randomly selected for an additional step of Quality Assurance.

No external power is required. The D1P has a minimal power draw and can be powered directly by your mobile device or computer, ensuring efficient operation without significant power consumption. If you do not have a computer close by and are using the optical, any 5v DC USB power supply will work.

The D1P supports a wide range of headphones, from 10-600 Ohms, accommodating nearly all audiophile-grade headphones.

The D1P gives priority to the optical input over USB when dual connected.

Ensure the toggle switch is set to the headphone output and not the line out. This common step is overlooked and is crucial for directing audio correctly.

Key components include a Savitech SA9312 USB, an ESS ES9219C DAC for superior audio decoding, and a Cirrus Logic CS8416 for optical input, ensuring premium performance and sound quality.

The Toslink digital optical input allows the D1P to accept PCM stereo streams from any optical source, like TVs, computers, and media servers, providing flexible and high-quality audio connectivity.

The D1P processes PCM digital audio up to 32 bits and a maximum sample rate of 384kHz. It also supports DSD playback up to DSD128, allowing for high-resolution audio playback.

Yes, the D1P has built-in MQA hardware to complete the final unfold of an MQA audio file, offering a crystal clear listening experience.

The D1P supports MQA, FLAC, PCM, and DSD formats, ensuring it can handle a wide range of high-quality audio files for your listening pleasure.

By bypassing your computer’s internal DAC or sound card, the D1P with its advanced DAC technology and custom audiophile-grade connectors delivers a more expansive and detailed soundstage, enhancing your listening experience across platforms like iTunes, TIDAL, Spotify, and Pandora.

The D1P accepts both USB-C and S/PDIF optical input from any device with a TOSLINK digital optical, for your digital audio sources.

It is powered by your devices through a USB-C connection, with no need for an additional/external power source. This ensures convenient and versatile use across all your digital devices on-the-go, or from your home.

Absolutely, the D1P is engineered to power audiophile-grade headphones effortlessly. Its robust yet portable 32-bit headphone amplifier ensures superior sound quality from even the most demanding headphones.

The D1P works with iOS, Android, MacOS, and Windows devices, supporting any device with a USB or digital audio output, including phones, laptops, and computers.

Audio formats and bitrates are shown by the color of the indicator light on the D1P

White   PCM 32-48kHz

Green   PCM 88.2-192kHz, DSD64, Optical

Blue      PCM 352.8-384kHz, DSD128

Purple  MQA Rendering

*When connected to a Mac or PC, the indicator light reflects what your system sound audio output quality is set to, not the bitrate of the specific track you’re playing.

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