Audioengine D2 Premium 24-bit Wireless DAC
Audioengine D2 Premium 24-bit Wireless DAC allows you to stream wireless HD audio from your computer to any music system, independent of your Wi-Fi network. D2 includes USB and optical inputs, a high-performance DAC, plus the isolation benefits of wireless. Setup is fast and simple, with no software to install and without the frustration of trying to connect to your network.
Game-Changing Computer Audio
The D2 offers audio fidelity and features of DACs costing several times more, but with one very important feature - it's wireless! D2 is a simple to use yet powerful digital-to-analog converter with performance and features generally found in much more expensive DACs. The D2 processes digital audio at any bit depth up to 24 bits and sample rates to 192KHz, then sends your music over-the-air at 24/96. It accepts USB or PCM-stereo optical and will automatically configure to match either of these inputs.
Easy Setup and Simple Operation
Bypass your computer's sound card or headphone jack and send wireless HD audio to any music system. D2 transmits all music file formats from any computer media player and can simultaneously transmit HD audio to up to 3 wireless receivers. The 100ft (30m) typical range, low latency, built-in DAC, and resistance to interference and dropouts makes D2 the best-sounding HD wireless system available.
The D2 is actually three products in one - a high-quality USB wireless computer DAC, a wireless USB-to-SPDIF converter, and a wireless optical PCM-to-stereo link. The ability to stream HD audio wirelessly from your computer direct to your music system not only keeps your computer away from your audio gear, but also minimizes nagging problems such as ground loops, induced cable noise, and jitter. And if you already have a favorite DAC, the D2 can provide bit-perfect wireless USB-to-SPDIF conversion or serve as a wireless link for your PCM-stereo stream.
Join the Computer Audio Revolution
The D2 sends a 24bit/96KHz PCM stereo digital stream over-the-air in a "closed-system" Wi-Fi configuration. The system's proprietary RF technology ensures data integrity with no impact on existing routers or networks. The volume control on the D2 Sender is transmitted over an entirely separate channel so there is no impact on the digital audio stream.
See and Hear the Difference
Audioengine designers, with their attention to audio quality as well as visual aesthetics, have created a feast for both the eyes and ears. The rounded anodized aluminum case of the D2 reflects traditional Audioengine design and the audio fidelity is typical of Audioengine's commitment to great sound at an affordable price. The Audioengine D2 continues to close the gap between your computer music and home hi-fi and even if you're not an audio enthusiast we guarantee your music will sound better!
DAC type: Dual Mode USB and Optical (SPDIF) wireless DAC
Inputs: USB/Optical (SPDIF)
Outputs: RCA Stereo/Optical (SPDIF)
D/A converter: PCM1792A
Optical receiver: AK4117
USB controller: TI1020B
Full-scale output: 2.0V RMS
Output impedance: 100 ohms
Power source: Sender: USB 5V or included external supply
Receiver: Included external supply
Sender: 270mA, 5V
Receiver: 300mA, 5V
USB power filtering: 3-stage redundant regulation
SNR: (DC to 20 kHz) >115dB
THD+N: (1kHz FS 96kS/s) <0.0015%
Frequency response: 10Hz-30KHz (+/- 0.5dB)
Input bit depth: 24 bit (upsampled)
Input data rate: 96kHz - native playback
44.1kHz, 48kHz, 188.2kHz, 192kHz - re-sampled to 96kHz for playback
USB device class
type 1.1 or above
Wireless range (typical): >100ft
Receivers supported: Up to 3
Product dimensions: 4.75x5.5x1"
Shipping weight: 4lbs (2.0kg)
Shipping box dimensions: 15x9x5"
Operating Temperature: 32 to 95 degrees F
Non-operating Temp: -4 to 113 degrees F
Relative Humidity: 5% to 95% non-condensing
Included accessories (D2 Sender)
USB cable, 2ft
Power adapter with detachable AC cord
Included accessories (D2 Receiver)
RCA cable, 6.5ft
Power adapter with detachable AC cord
Advantages of wireless
The D2 wireless system transmits bit-perfect PCM-stereo simultaneously to up to 3 receivers. This PCM stream is routed from/to the various components of the system (optical transmitter/receiver, USB controller, and DAC) via the I2S bus, which maintains data integrity throughout the system. Because the various source/sink components are segregated by the wireless subsystem, various anomalies which plague many wired DACs such as jitter, grounding, and induced cable noise are greatly reduced. In addition, the D2 allows the user to physically isolate a potentially noisy computer from the sensitive audio components in your system.
The D2 utilizes the TI1020B USB controller chip, widely recognized as the industry standard for higher-end USB audio products. The Sender can be powered directly from the USB bus or from the included external power adapter. The USB power is passed through two stages of regulation to ensure high stability and low noise.
The D2 Receiver utilizes the PCM1792 DAC, widely know for it's low noise and high fidelity. Due to the PCM1792's high signal-to-noise specs and the added benefit of triple redundancy power source conversion and filtering, the D2 presents impressive low noise and low distortion characteristics.
I2C Volume Control
The D2 incorporates a separate-path wireless channel to transmit volume information from the Sender volume control to the analog section of the Receiver. This means that the volume information never affects the digital audio stream.
D2 and LAN
The D2 system divides the band between 2405 MHz and 2477 MHz into 37 discrete, 2 MHz wide channels. Channels numbered 2 through 38 inclusive are used for system operation. The system scans the spectrum and selects two channels that are 18 channels (or 36 mHz) apart and transmits with 50% of the time on one channel (for example channel 2) and 50% on the other channel (for example channel 20). The system stays on these selected channels until the error detection rate reaches a pre-determined level indicating deteriorating RF conditions. The system will then select a cleaner channel for transmission and move there without any drop in audio. In this way the D2 not only maintains it's own audio integrity, but co-exists nicely with other LAN devices.
Can I use the D2 with an Apple iPhone or iPad?
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
I have the original Audioengine 5 (not the A5+), will the D1 / D2 DAC work with the inputs on that original model?
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.
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?
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.
Where can I download drivers for the D2?
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 computers operating system. In the case of a Windows PC for example, these drivers are provided by Microsoft, and are a part of Windows.
What is the best USB cable length to use with D2?
USB cable performance will vary with construction and length, however, for the best results we recommend using the shortest cable possible (2' or less).
Can I connect the D2 Sender to a USB hub?
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.
I'm hearing a crackling/popping sound when playing music. What am I doing wrong and how can I fix this?
When issues do crop up in USB audio, this is a common symptom. The PDF linked below outlines the issue and potential causes as well as some common fixes.
Will the D2 work with USB 1.1?
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.
How do I make sure that the D2 DAC is set to 24-bit/96KHz audio?
If using a Mac, open the Audio MIDI Setup utility in Applications->Utilities, choose "Audioengine D1" under audio devices and check that the format is set to 96 and the bit depth is set to 24bit.
I'm having trouble using my D2 with Foobar in WASAPI and KS mode. What do I do?
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.
Is there an easier way for Mac users to get to System Preferences and the Audio MIDI Setup control panels?
A customer recommended an app called Soundsource - http://rogueamoeba.com/freebies - which is an easy way to switch between audio input and outputs as well as to access System Preferences and the Audio MIDI control panels.
Is there a recommended "break-in period" for the D2?
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 first before doing any critical listening.
Is the D2 USB isochronous or asynchronous?
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.
Will the volume control on the D2 Sender affect my audio?
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. Will the D2 interfere with my other wireless devices? 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.
What can I do to further ensure that all my wireless devices work well together?
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.
How many wireless "zones" can I set up with D2?
The D2 Sender can simultaneously broadcast to (3) D2 Receiver units. See the Pairing section in the D2 Setup Guide for pairing additional receivers.
Why does D2 have a digital optical but no coax interface?
We chose optical over coax inputs and outputs for D2 (and D1) primarily because TV's, Apple TV, and computers all have optical ouputs. 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.
Can I use D2 to connect my computer wirelessly to another DAC in my audio system?
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.
Can I take my D2 to another country with a different voltage?
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.
What is the AC power cord type for Audioengine D2?
We use 2-pin non-polarized IEC 320-C7 cables, which is common and can be purchased at most electronics stores.
How does D2 differ from the Audioengine W1 or W3 wireless adapters?
The D2 offers bit-perfect 24/96 transmission, while the W1 and W3 wireless are 16-bit adapters (16/44.1 and 16/48KHz).
D2 Troubleshooting Tips
- Try restarting your computer and testing your D2 again to see if this helps.
- Make sure the USB and audio cable connections to and from the D2 are complete and verify that these cables are in working order. We recommend using the USB cable included with your D2, however, if you are using another USB cable, make sure it is no longer than 3 ft (1 meter).
- Power your D2 sender with and without the external adapter to see how this affects your issue.
- Remove all other USB devices temporarily to see how this affects the D2 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 port one at a time.
- When using the optical input on your D2 be sure your source (computer, TV, CD / DVD player, etc) is set to PCM Stereo output and not Dolby Digital, DTS, etc.
- Test your D2 with a different computer/setup at a different location, maybe at a friend or relative's house. This would help to verify if there is something wrong with the D2 or something else in your setup that is causing this issue.
- 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 the link below from Apple's support page for information on how to do this.http://support.apple.com/kb/ht1379
- Use 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.
- Test a different media player (iTunes, Songbird, WinAmp, etc) and file types (MP3, FLAC, etc). If your media library is located on an external drive or network attached storage, please try playing audio files located on your internal harddrive.
- Try letting windows reinstall the D2’s device driver. You can find instructions from Microsoft on how to reinstall a plug and play device like the D2 under Windows here;http://technet.microsoft.com/en-us/library/cc725782.aspx#bkmk_2
- Use different Bit Depths and Sample rates. In Windows 7 you can get to these settings by right clicking on your volume icon in the system tray and selecting "playback devices", then double click the "Speakers Audioengine D2" dialog, now you'll find these under the advanced tab of the "Speakers Properties" window. Try using both 16 bit as well as 24 Bit on a variety of sample rates.
- Use a different media player (Windows Media player, Foobar2000, iTunes, WinAmp, etc) and file types (MP3, ALAC, FLAC, etc). If your media library is located on an external drive or network attached storage, please try playing audio files located on your internal harddrive. Sometimes other devices in your system including built in devices don't play nice with audio over USB. For more advanced users running the linked application may help to diagnose what components or drivers may be causing problems. http://www.thesycon.de/eng/latency_check.shtml
Interference / Dropouts
- Try changing the channel of your WiFi router to 1 or 11. This can be done with an Apple router using Apple’s Airport Utility software. On most other routers, these settings can be accessed by logging on to the routers IP address through a web browser.
- Keep as much room between the D2 sender and receiver units and other wireless devices as possible. At least 4 or 5 feet is recommended.
- Temporarily, try moving the powered D2 sender unit as close as possible to your wireless router. Leave it there for just a few minutes and then place it back into your setup and retest. This may allow the D2 to train itself to "steer clear" of the signal. We have found that every now and then the placement of the computer's antenna in relation to the USB port can have an effect on the D2. One thing you could try is to move the D2 further from the computer by using a longer USB cable. If using a Mac laptop, try the USB port furthest away from the display (the display is where the wifi antenna is located).
- Consider upgrading to a new wireless router if yours is older than 3 or 4 years. Newer model routers handle interference much better than older routers. Routers operating on the 5GHz band won’t interfere with the D2.