D1 Desktop Headphone Amplifier and DAC

The Gen 1 24-bit D1 requires a USB 2.0 cable to work properly. If your computer has USB-C inputs, use a 2.0 USB cable with a type C-to-A USB adapter.

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, there are no firmware updates or special drivers needed unless you own our A1-MR multi-room speakers or our B-Fi multi-room wireless streaming device.

If a firmware update is released for the A1-MR or the B-Fi, you will be notified of the update the next time you open the Audioengine Control App.  If an update is needed, simply click "update" on the DEVICES page next to the product that needs to have the firmware update applied.  The app will handle the rest of the process from there!

Standard plug-n-play drivers that are provided by your computer's OS are utilized when using the USB input on our A2+, HD3, and HD4 speaker models.

And all of our Bluetooth speakers/products are compatible with any device that supports Bluetooth, and the A2DP profile for streaming stereo audio. This includes most smartphones, tablets, and computers. For computers that don't include Bluetooth support out of the box, you can simply add a USB Bluetooth adapter.

When using the optical input of the D1 DAC or the HD6 speakers, you'll need to make sure your TV's audio output is set to PCM (not Dolby, DTS, or 5.1/surround).  Special hardware is needed to process Dolby audio signals.  If your TV is set to Dolby, it's likely you'll hear some audio but it will be intermittent in nature with dropouts.  Once the output is set to PCM, this should resolve the issue.  Check with your TV manufacturer for directions on how to make this adjustment.

The D1 includes a headphone amplifier based on the ES9601C SABRE low noise opamp.  This headphone amp is able to provide low-impedance, high-fidelity audio to a wide range of headphones.  We've found the sweet spot for the D1 is headphones that measure between 20 and 300ohms.  The resistance of a pair of headphones can tell you a little bit about how much power they need, though other variables do have an impact as well. We have heard from customers with headphones measuring as much as 600ohms who say they're happy with the output of the D1.

Try removing all other USB devices temporarily, and try each USB port on your computer one at a time to see which one works best in your setup. USB audio needs quite a bit of bandwidth, so for best results ensure your D1 is on a "High-Speed" bus and not a "Full-Speed" bus.

In the Foobar control panel, under Preferences->Output, set the buffer length to minimum. A few customers have mentioned that WASAPI mode is more stable when used under WinAmp, so try that as well.

Your D1 will sound great out of the box and will get better over time, however, it's best to play music for 40 to 50 hours first before doing any critical listening.

If using a Mac, open the Audio MIDI Setup utility in Applications->Utilities, under Audio Devices, choose "Audioengine D1" and check that the format is set to 96 and the bit depth is set to 24bit. On a PC, open the sound options through the control panel. Then choose Speakers - Audioengine D1" and select Properties. You can select the output format from the dropdown in the advanced tab.

The D1 is essentially a very high-end external sound card. Its components and implementation of those components make it more capable than what might be built into a computer, not to mention the benefit of moving those sensitive components outside and away from the potentially noisy interior of your computer. All of this means the signal your speakers receive will be clearer, with a lower noise-floor, and with a more pronounced dynamic range over your internal sound card.

You should be able to incorporate the Airport Express with the D1 easily. All you would need to do is run an optical cable from the output of the Airport Express into the optical input of the D1. Then all you would need to do is connect the D1's RCA output into the analog input of your Audioengine Speakers or your AV receiver.

The D1 will work with any device that can operate as a USB host, can provide enough power via USB, and includes generic drivers for standard USB audio playback.  A device with Android 5.0 or later should have both USB host mode and native plug-and-play functionality for USB audio, so you could connect the two together using a USB OTG cable along with a standard USB cable.

Unfortunately that is not how the D1 is designed, as the optical connection will take priority. You may be able to have the optical and USB connected to different devices, but it depends on the how the optical device operates. Some devices will deactivate their optical out when no media is playing. Others will leave it active and send an empty signal when no audio is playing, in that case you will want to shut the optical source off. It can be bypassed when using something like an optical switcher so that you can toggle between the optical source and the USB input.

Both USB and Optical should provide the same high-quality digital signal to your D1.  In most cases where both USB and optical are available, we usually recommend USB since it's a shorter signal path.  The only real difference is that the optical input on the D1 can support up to 192KHz input if your source supports it.  We'd certainly recommend trying both if you have them available to see if you can notice any difference in your setup, and with your audio files.

It's normal for USB B connections to have a little play as well as some of the metal to be showing when they are plugged in, so no need to worry. It will be fully connected once you feel and hear the click noise from the connection.

Optical and USB outputs are all digital, so both Windows and Mac OS X will disable the system volume control when they are in use. You can still control the volume directly in iTunes (or any media player), with the front panel volume control on the D1, or with the volume control on your audio system.

Absolutely! We've had a lot of really good feedback from our customers on this, and it's really easy to add to an existing Airplay setup. You can connect your Airport Express into the D1's optical input using a mini-Toslink to Toslink cable to pass a digital signal to the D1. Like other setups without a computer you'll still need to connect the D1 to a USB connection for power - Either a USB AC adapter like we offer in our accessories, or a nearby USB port capable of delivering a minimum of 500mA. Please note that the USB port on the Airport express is intended only for lower powered or self powered devices (like a printer) and will not reliably power the D1.

Yes! You will need an Apple USB 3 camera adapter.  What you would need to do is connect the D1 and its USB cable to the USB A port on the Apple USB 3 camera adapter, and then the male lightning end of the Camera Adapter to your iOS device. You will also need to have a power supply that can power enough to the D1 and your device.  Apple's USB C Fast charger is recommended for this.

When you connect an optical cable, the D1 will sense that an optical input is present and give that input priority. If using D1 with optical outputs from your TV, DVD player, Apple TV, etc you will need an AC USB power adapter (sold separately) to power D1. When using the optical output from your computer, you may power D1 via the computer's USB power and therefore no external power supply is needed.

The D1 is asynchronous, which means it controls the data streams timing using its own internal clock to minimize jitter.

Yes, however, note that 24/96 HD digital audio pushes the limits of USB 1.1 speeds. Due to this it's highly recommended that you connect to a higher-speed USB 2.0 port.

You can, but we recommend not using USB hubs as the hubs can lead to a reduction in data flow rate which may not be fast enough for higher-resolution audio. Additionally, when using a USB hub, you are adding in the possibility of internal noise being picked up. For example, wireless mouse/keyboards may negatively impact the audio quality.

You can use Audioengine DACs with your original A5s, no problem. You would simply use a standard RCA cable and the RCA to mini-jack adapter that came with the A5 to connect the RCA output from the DAC in to one of the mini-jack inputs.

The D1 includes a headphone amplifier based around the ES9601C SABRE low noise opamp. This headphone amp is able to provide low-impedance, high-fidelity audio to a wide range of headphones and supports headphones with impedances 10 ohms and higher.

These RCA outputs are variable, adjusting the volume on the D1 will adjust the output of any speakers or amp connected to this output. This makes the D1 a handy way to control the volume of both your speakers AND headphones.

Yes, the output will mute and audio will only play through your headphones.

When connected via USB with a computer, the D1 acts like a USB sound-card. Because of this, once it's set as your default playback device, it should work with any application on your computer playing audio, and with any file format the software supports.

The D1 is a USB Plug-and-Play audio device. which means that the drivers it uses are developed and provided by the developer of your computer's operating system. Because of this, you shouldn't need to download or upgrade any drivers to use your D1.

To get things up and running, you would just need to first connect the included USB cable from your computer's USB port to the D1; then you'll need to connect the RCA outputs to your powered speakers/ AV receiver or your headphones to the headphone output on the front of the D1.

Next, if using a Mac, you will need to go to System Preferences/Sound, and select "Audioengine D1"; if you're using a PC, no setting changes are needed as the computer will automatically find the USB driver. Finally, you'll just need to play music from iTunes or your favorite media player and that's it! Setup really is that easy!

There's not really a right or wrong when it comes to volume settings.  I'd recommend setting it up whichever way is more convenient, and dialing in a combination of settings to give you the smoothest ramp-up.  If you intend to use the D1's volume as your main control for example, try this: set the speakers to zero volume, and the D1 to max volume.  Then with music playing, adjust the speakers up until the volume is as loud as you would want to listen to it.  Then simply adjust from the your D1 to mood.