Questions & Answers

• Question:

  Can I use D2 to connect my computer wirelessly to another DAC in my audio system?

  Answer:

  Absolutely! If you use the USB input of the D2 Sender, then connect the D2 Receiver optical output to your DAC and the D2 will act as a wireless 24-bit USB-to-SPDIF converter and stream high-resolution digital audio to your favorite DAC. You can also use the optical input on the D2, in which case the D2 will act as a wireless optical link to your DAC. Can I use a third-party (non-Audioengine) AC power adapter to power my D2 Sender and/or Receiver? The D2 AC power adapters have been specifically designed to provide stable low-noise power to the D2 so only use the included Audioengine power adapters. Using any other power adapter will compromise the audio quality and may damage your D2.

• Question:

  The D2s volume control is on the sender. Does that mean it's a digital control? Will this affect audio quality?

  Answer:

  No. The volume information is transmitted via a completely separate I2C channel over the air and is used at the output of the internal DAC of the D2 Receiver to attenuate an analog output.

• Question:

  How does D2 differ from the Audioengine W1 or W3 wireless adapters?

  Answer:

  The D2 offers bit-perfect 24/96 transmission, while the W1 and W3 wireless are 16-bit adapters (16/44.1 and 16/48KHz).

• Question:

  Is the D2 USB isochronous or asynchronous?

  Answer:

  The D2 uses "adaptive mode" in it's USB receiver. This means that the USB receiver (Texas Instruments 1020B) will keep track of the data coming in from the computer and adjust so as not to miss any incoming data. Due to the nature of the wireless link, the data then becomes asynchronous before arriving at the Receiver. Thus the D2 acts as an asynchronous USB DAC with the added benefit of being 24/96 bit-perfect wireless.

• Question:

  Why does D2 have a digital optical but no coax interface?

  Answer:

  We chose optical over coax inputs and outputs for D2 (and D1) primarily because TVs, Apple TV, and computers all have optical outputs. Regarding optical vs. coax quality, there are various thoughts and theories on which is better but our experience is that as long as optical is implemented correctly and the connectors are high-quality, it is essentially the same digital SPDIF signal.

• Question:

  Can I use the D2 with an Apple iPhone or iPad?

  Answer:

  Yes! You will need an Apple USB camera adapter, and a self powered USB hub. We've tested this with the D-link DUB-H4 and DUB-H7, and it works well. Here's an example of how this would be connected:

  iDevice w/ USB Camera Adapter --USB-> Powered hub --USB-> D2 Sender --wireless-> D2 Receiver --RCA-> Speakers

• Question:

  Is there a recommended "break-in period" for the D2?

  Answer:

  Your D2 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 before doing any critical listening.

• Question:

  Where can I download drivers for the D2?

  Answer:

  The D2 is a USB Plug-and-Play audio device. This means that the drivers it uses are developed and provided by the developer of your computer’s operating system. In the case of a Windows PC for example, these drivers are provided by Microsoft, and are a part of Windows.

• Question:

  How many wireless "zones" can I set up with D2?

  Answer:

  The D2 Sender can simultaneously broadcast to (3) D2 Receiver units. See the Pairing section in the D2 Setup Guide for pairing additional receivers.

• Question:

  What can I do to further ensure that all my wireless devices work well together?

  Answer:

  If you use a wireless 802.11g router, set the channel to either 1 or 11. If you have a 2.4G WLAN-N access point in your home, make sure it is set to 20MHz bandwidth and not 40MHz.
• Question:

  How do I make sure that the D2 DAC is set to 24-bit/96KHz audio?

  Answer:

  If using a Mac, open the Audio MIDI Setup utility in Applications->Utilities, choose "Audioengine D2" under audio devices and check that the format is set to 96 and the bit depth is set to 24bit.

• Question:

  Can I take my D2 to another country with a different voltage?

  Answer:

  Yes, D2 uses switching power supplies so they will automatically convert to the different voltage. The AC power cord is detachable which makes it convenient to replace the AC plug with a different type if you don't want to use an adapter plug.
• Question:

  What is the best USB cable length to use with D2?

  Answer:

  USB cable performance will vary with construction and length, however, for the best results we recommend using the shortest cable possible (2' or less).

• Question:

  D2 Quick Setup

  Answer:

  The following diagrams show the most common configurations for D2 Setup.

  Note: For maximum range, ensure that both antennae are upright.

  USB from your computer

  

  Step 1 -- Connect the D2 Sender to your computer USB port.

  For PC, the D2 should be recognized automatically.

  For Mac, under System Preferences/Sound, select “Audioengine D2”

  Step 2 –- Connect the analog output of your D2 Receiver to any audio input of your active speakers, stereo, etc.

  Step 3 -- Connect the D2 power adapter to the D2 Receiver, and to an AC power source.

  Optical Source

  

  Step 1 -- Connect an optical output of your computer, TV, Blu-Ray, DVD, etc. to the optical input of the D2 Sender.Step 2 -- Connect the D2 power adapter to the D2 Sender, and to an AC power source.Note: Verify that your source is set to PCM Stereo.

  Step 3 –- Connect the analog output of your D2 Receiver to any audio input of your active speakers, stereo, etc.

  Step 4 -- Connect the D2 power adapter to the D2 Receiver, and to an AC power source.

  Pairing

  Pairing is the function by which two devices become acquainted. Once a Sender and Receiver(s) are paired, they will remember one another.

  Note: D2 Senders and Receivers packaged together are paired out of the box, so if you’re only using one Sender/Receiver set, no further configuration is needed.

  To pair an additional Receiver or to re-pair a Sender/Receiver set, press the Pair button on the Receiver (the Pair LED will blink), then press the Pair button on the Sender. Both Sender and Receiver pair lights should now be solid, indicating that they are paired.

  ---

  For the full setup guide, download the attached PDF:
  D2 setup guide_web

  ---

  D2 Setup Video

  [video width="1920" height="1080" mp4="https://audioengineusa.com/wp-content/uploads/2018/03/D2_How_To.mp4"][/video]

• Question:

  If the D2 DAC Sender is connected to my MacBook in another room do I have to go back to the computer to change songs?

  Answer:

  The free Remote app for iTunes works nicely on an iPhone/iPad and there are plenty of free apps for non-iTunes based systems as well as Android-based apps.

• Question:

  Can I connect the D2 Sender to a USB hub?

  Answer:

  Although D2 may work just fine when connected to most USB hubs, this is not recommended as the data rate may not be fast enough for higher-resolution music. We therefore suggest you select a high-speed USB bus all by itself and don't use a USB port on your keyboard, for example.

• Question:

  Will the D2 work with USB 1.1?

  Answer:

  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.

• Question:

  I'm having trouble using my D2 with Foobar in WASAPI and KS mode. What do I do?

  Answer:

  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.

• Question:

  What is the AC power cord type for Audioengine D2?

  Answer:

  We use 2-pin non-polarized IEC 320-C7 cables, which is common and can be purchased at most electronics stores.

• Question:

  Will the D2 interfere with my other wireless devices?

  Answer:

  The D2 is designed to play well with most wireless devices, especially computers and routers. We do, however, recommend that you locate the D2 at least 12" from other wireless products.

• Question:

  What are the QA Stickers?

  Answer:

  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.

• Question:

  Bluetooth won’t connect on my Mac Computer (2019 or newer). Reset the Bluetooth to determine if that is the issue.

  Answer:

  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

  3. 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.

• Question:

  The audio cuts out at randomly when using the optical input with my TV, what can I do?

  Answer:

  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.

• Question:

  I have the original Audioengine 5 (not the A5+ Classic), will the D1 / D2 DAC work with the inputs on that original model?

  Answer:

  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.