Wireless DACs for Android: Types, Specs, Options & More
A DAC (digital-to-analog converter) converts digital audio signals into analog signals that can be amplified and played through speakers or headphones. Wireless DACs allow you to transmit audio over Bluetooth or WiFi instead of a wired connection.
There are several benefits to using a wireless DAC with Android devices:
- Improved audio quality – Dedicated DACs provide better conversion than what’s built into phones.
- Bypass internal DAC – Allows you to bypass the often lower quality DAC built into your phone.
- Convenience – No cables to connect your phone to speakers or headphones.
- Portability – Listen wirelessly anywhere within range.
The main types of wireless DACs for Android include:
- Bluetooth DACs – Use Bluetooth to transmit audio to the DAC which is often built into powered speakers.
- WiFi DACs – Allow wireless streaming over WiFi networks from the DAC to speakers.
- LDAC DACs – Use Sony’s LDAC codec for Hi-Res quality over Bluetooth.
- aptX DACs – Utilize Qualcomm’s aptX codecs for improved wireless audio quality.
Bluetooth DACs
Bluetooth DACs allow you to wirelessly stream audio from your smartphone or tablet to the DAC. They use Bluetooth wireless technology to receive the audio signal and then convert it to an analog signal that can be sent to headphones or speakers.
Bluetooth DACs support high quality audio codecs like aptX HD, LDAC, and AAC to provide better than CD-quality wireless audio. aptX HD can support up to 24-bit/48kHz resolution while LDAC can go up to 32-bit/96kHz (Source).
The benefits of Bluetooth DACs include their convenience, portability, and ability to upgrade the sound quality of devices like smartphones that don’t have great built-in DACs. However, Bluetooth audio has higher latency and is more compressed compared to wired connections.
Some popular Bluetooth DAC models include the iFi Go Blu (Source), Topping DX3 Pro+, and Astell & Kern AK HB1 (Source). These provide high resolution wireless audio while remaining portable and battery powered.
WiFi DACs
WiFi DACs allow you to stream audio wirelessly from your device to the DAC. They work by connecting to your phone, tablet, or computer over WiFi instead of a wired connection.
WiFi DACs support high resolution audio codecs like LDAC, aptX HD, and AAC to deliver better than Bluetooth audio quality. However, the maximum quality depends on the specific codec supported. For example, LDAC can transmit up to 990kbps while aptX HD is limited to 576kbps [1].
Some of the key benefits of WiFi DACs include:
- Higher bandwidth than Bluetooth for improved audio quality
- Low latency for syncing audio with video
- Longer wireless range than Bluetooth
However, there are some downsides to consider as well:
- More power consumption due to WiFi usage
- Potential interference from other WiFi networks
- Setup and configuration requires more steps than Bluetooth
Popular WiFi DAC models include the Audioengine D3 [2], Bluesound Node, and the Chord Mojo 2 Poly [3].
LDAC Wireless DACs
LDAC is an audio coding technology developed by Sony that allows for high-resolution wireless audio transmission over Bluetooth at up to 990 kbps. It was introduced in 2014 and aims to enable wireless transmission of Hi-Res audio content.
LDAC works by analyzing the audio characteristics and optimally allocating bits to audio samples to maximize audio quality. It can adjust the bitrate dynamically based on transmission stability, with options for 330kbps, 660kbps, or 990kbps transmission. At 990kbps, LDAC can transmit 24 bit/96 kHz audio.Sony LDAC
Many modern smartphones, portable music players, headphones, speakers, and receivers are LDAC compatible, especially Sony devices. Some examples include the Sony WH-1000XM5 headphones, Fiio BTA30PRO DAC, and Shanling UP5 DAP.LDAC Wikipedia
Compared to standard Bluetooth audio codecs like SBC and AAC, LDAC provides superior audio quality by reducing compression. At the highest bitrates, the differences are noticeable for critical listening and high-resolution music playback. However, connection stability can suffer at maximum bitrates.SoundGuys LDAC Guide
Some recommended LDAC compatible wireless DACs include the iBasso DC05, Fiio BTA30PRO, and Shanling UP5. These portable DACs allow you to connect LDAC headphones or speakers wirelessly to playback music from smartphones and other devices.
aptX Wireless DACs
The aptX codec was developed by Qualcomm and is supported on many Bluetooth audio devices. It is designed to improve audio quality over standard Bluetooth connections by using a more efficient encoding and transmission process.
The aptX codec supports 16-bit/44.1kHz audio, which matches CD quality. While this is lower resolution than some other codecs like LDAC, the consistent and stable connection of aptX makes it a good choice for Bluetooth audio.
aptX audio has a bitrate of 352kbps compared to SBC’s 328kbps, which allows it to transmit more high frequency detail. The result is audio that is fuller, warmer, and closer to the original recording. There is less compression and artifacts compared to SBC.
Many Android smartphones support aptX, especially higher end models. Popular aptX DACs include the Fiio BTR3K and Shanling UP4. These portable DACs offer convenient Bluetooth connectivity with improved aptX sound quality. The Fiio BTR5 is a great balanced output aptX DAC.
Overall, aptX provides a reliable and consistent wireless listening experience. While the audio resolution is not as high as LDAC, it avoids connection issues and works seamlessly across many devices.
Balanced Output DACs
A balanced output on a DAC allows it to drive higher impedance headphones and provides more power. Balanced output uses separate grounds and complementary signals for the left and right channels, which can help reduce noise and crosstalk. It essentially doubles the voltage swing of the amplifier. This results in lower distortion, greater dynamics, and improved stereo imaging compared to single-ended connections [1].
One of the main benefits of balanced outputs is the ability to deliver more power to demanding headphones, especially those with high impedance. This leads to better control, dynamics, and reduced distortion at high volumes [2]. The improved channel separation can provide a wider and more precise soundstage as well [3].
Some recommended wireless DACs with balanced outputs include the Fiio BTR5, iBasso DC05, Qudelix 5K, and Shure RMCE-BT2. These provide balanced output via 2.5mm, 3.5mm or 4.4mm Pentaconn ports. For the best results, use headphones or IEMs equipped with detachable balanced cables terminated in the appropriate connector.
MQA Support
MQA (Master Quality Authenticated) is an audio codec technology developed by Meridian Audio that aims to deliver high resolution audio in a file small enough to stream. MQA encoding folds audio origination information into the file, which an MQA-capable DAC can then unfold to recover the original high-resolution signal.
Some benefits of having an MQA-enabled DAC include:
- Ability to decode and render the high-resolution MQA file for an improved listening experience compared to standard lossy audio formats like MP3.
- Access to Master quality audio files from Tidal Masters and other MQA content providers. According to some audiophile forums, MQA can provide better clarity and spatial imaging.
- Peace of mind knowing you can take full advantage of MQA streaming services now and in the future as more content becomes available.
Popular wireless DAC models that support MQA decoding include the iFi Go Blu, Audioquest DragonFly Cobalt, and FiiO BTA30 Pro. When shopping for an MQA DAC, make sure to verify MQA rendering capability in the product specifications.
Battery Life Considerations
One of the key factors to consider with a wireless DAC is battery life. Most wireless DACs have an average battery life of 6-12 hours for continuous playback. However, certain models like the iBasso DC05 can achieve up to 20 hours thanks to a large built-in battery.
Many wireless DACs also feature quick charging capabilities via USB-C which allows you to get several hours of playback from just a 15-20 minute charge. This makes it easy to top up the battery between uses.
It’s also important to note the battery life impact on your phone when using a wireless DAC. Since the DAC handles the audio decoding and amplification, it reduces the battery drain on your phone compared to using your phone’s internal DAC and headphone amp. So you can get improved sound quality without sacrificing battery life.
For sources see: Reddit, Audio Science Review, and Home Studio Basics.
Smart Features
Many wireless DACs come equipped with smart features and controls to enhance the listening experience. This includes things like:
Controls: High-end wireless DACs allow you to adjust volume, change tracks, play/pause, etc directly from the device. This allows you to control the music without having to pull out your phone.
Presets: Some models have preset EQ settings tuned specifically for certain genres or headphones. This makes it easy to optimize the sound with just a tap.
EQ: Most wireless DACs have a customizable EQ to tune the sound to your preferences. Some offer granular control with many frequency bands while others take a simpler approach.
Ambient Monitoring: Select wireless DACs feature ambient monitoring microphones that allow you to blend in external sounds like announcements or traffic. This enhances situational awareness while listening.
Microphones: Certain high-end models contain onboard mics for taking calls. You can answer calls directly from the DAC without removing your headphones.
These smart controls and features allow you to manage music playback and phone calls directly from the wireless DAC. High-end models aim to provide a seamless all-in-one listening experience.
Budget vs Premium Options
When looking for a wireless DAC for Android, there are options available at every price point. Here’s an overview of what to expect at different budgets:
Budget Under $100
In the under $100 range, you’ll find very basic wireless DACs like the LaudSports Bluetooth 5.0 Receiver. These often use older Bluetooth technology like Bluetooth 4.2, have lower quality DAC chips, and lack advanced features. The sound quality is a step up from your smartphone alone, but don’t expect audiophile-level performance. They make a great low-cost way to add Bluetooth to wired headphones.
Mid-Range $100-300
Stepping up to the $100-300 mid-range provides a noticeable jump in sound quality and features. You’ll find excellent options like the iFi Audio Zen DAC V2 which offers balanced and standard audio outputs, high quality components, and support for hi-res audio codecs like MQA and DSD. Build quality improves over more budget options and you’ll often find useful extras like bass boost or crossfeed settings for a more customizable listening experience.
High-End $300+
At the high-end, $300+ price point are flagship wireless DACs with premium components, stellar audio performance, and extras like touch screens and app control. Top options include the Chord Mojo 2 which offers superb clarity and musicality from its FPGA DAC chip, along with up to 15 hour battery life. These high-end DACs provide an exceptional listening experience comparable to wired desktop DACs. Just be prepared to pay for that premium sound and build quality.
