iFi Audio GO Blue Air DAC and Headphone Amplifier
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iFi Audio GO Blue Air DAC and Headphone Amplifier
What You Need to Know
What Is the iFi GO blu Air?
The GO blu Air is a tiny, portable Bluetooth DAC (digital-to-analog converter) and headphone amplifier from iFi Audio. It lets you use your favorite wired headphones or earphones wirelessly with your phone, tablet, or laptop. You pair it over Bluetooth, clip it to your bag or jacket with the built-in magnetic clip, and plug your headphones into it. Your phone streams the music wirelessly to the GO blu Air, which converts it back to an analog signal and drives your headphones with a proper amplifier.
Why would you want this? Because most phones either lack a headphone jack entirely or have a weak built-in DAC and amp. The GO blu Air gives your wired headphones a dedicated, high-quality audio chain—better conversion, more power, and cleaner sound—without any cables between your phone and the device.
What Makes It Stand Out?
Most Bluetooth audio devices use a single chip to handle everything—Bluetooth reception, digital-to-analog conversion, and amplification. The GO blu Air takes a different approach, splitting those jobs across separate, optimized stages. A Qualcomm QCC5144 chipset handles Bluetooth 5.2 reception. A Cirrus Logic MasterHIFI DAC handles the conversion. And a symmetrical twin-mono amplifier stage drives your headphones. This stage-by-stage design is inspired by the way full-size hi-fi systems separate components for better performance.
The GO blu Air supports a wide range of high-resolution Bluetooth codecs—including LDAC, LHDC/HWA, aptX Adaptive, aptX HD, aptX, AAC, and SBC—so it can receive up to 24-bit/96kHz audio wirelessly from compatible devices. That’s well above CD quality.
It has two headphone outputs: a 4.4mm balanced output that delivers up to 256mW of power (great for over-ear headphones), and a 3.5mm output with iFi’s S-Balanced technology, which halves crosstalk and distortion (ideal for sensitive in-ear monitors). Output impedance is less than 1 ohm on both outputs, which means it plays well with even the most sensitive IEMs.
Two analog sound-shaping modes—XBass and XSpace—let you fine-tune the sound right from the device. XBass adds warmth and punch to the low end, which is helpful for open-back headphones that tend to be lighter on bass. XSpace expands the soundstage for a more spacious, open feel. Both are analog processes, not digital EQ, and can be toggled on or off with the press of a button.
What Are Reviewers Saying?
Major HiFi — September 2025
Major HiFi reviewed both the GO blu Air and the original GO blu side by side. They found the Air’s sound just as rich as the original, praising XBass and XSpace for heightening headphone performance without sounding artificial. They called it an excellent option for portable listening.
Audio46 — September 2025
Audio46 praised the GO blu Air as an excellent choice for upgraded portable sound at an unbeatable value. They highlighted the balanced 4.4mm output, Bluetooth codec support, and iFi’s sound enhancement features as standout qualities for the $129 price point.
TechRadar — 2025
TechRadar noted the GO blu Air delivers warm, spacious sound with subtle sound enhancement from XBass and XSpace. They praised the useful magnetic clip and ultra-compact size. They also noted the design feels less premium than the original GO blu and that it lacks USB DAC functionality.
Who Is This Best For?
Your phone doesn’t have a headphone jack and you want to use your favorite wired earphones or headphones wirelessly.
You commute, exercise, or travel and want better audio quality than Bluetooth earbuds can offer—without a bulky device in your pocket.
You own high-quality IEMs (in-ear monitors) and want a portable amp that can drive them cleanly with low output impedance and low crosstalk.
You want balanced 4.4mm output in a portable device without spending $200+.
You want to take hands-free calls with a built-in mic while using your wired headphones.
How Does It Connect?
The GO blu Air connects to your phone, tablet, or laptop wirelessly via Bluetooth 5.2. Just pair it like any other Bluetooth device. Once paired, you plug your wired headphones into either the 4.4mm balanced output (for over-ear headphones or IEMs with balanced cables) or the 3.5mm output (for standard single-ended headphones and IEMs).
The USB-C port on the bottom is for charging only—the GO blu Air does not function as a USB DAC. If you need USB DAC capability, consider the original iFi GO blu or the iFi GO Link.
The ChronoDial on the side works as a volume control and track navigation tool. Press it to play/pause, turn it to adjust volume, and double-press to skip tracks.
What’s in the Box
- iFi GO blu Air
- USB-C charging cable
- Magnetic clip
- Quick start guide
Pairs Well With
Looking for the perfect headphones to pair with your GO blu Air? Here are some ideas:
- In-Ear Monitors — The GO blu Air’s S-Balanced 3.5mm output and low output impedance make it ideal for sensitive IEMs. Browse our Earphones & IEMs.
- Over-Ear Headphones — Use the 4.4mm balanced output for full-size headphones. Browse our Headphones.
- Balanced Cables — To use the 4.4mm output, your headphones need a cable with a 4.4mm Pentaconn plug. Browse our Headphone Cables.
Features & Specifications—Benefit-Driven
Audio Performance
Cirrus Logic MasterHIFI DAC — A dedicated DAC chip handles the digital-to-analog conversion, chosen for its natural tonality, low power draw, and high-resolution output. It’s separate from the Bluetooth chip, so each stage does what it does best.
Symmetrical Twin-Mono Amplifier — Two matched amplifier channels provide up to 256mW of clean, distortion-free power through the 4.4mm balanced output. Enough to drive most over-ear headphones with ease.
S-Balanced 3.5mm Output — iFi’s S-Balanced technology halves crosstalk and distortion on the 3.5mm output, making it especially well-suited for sensitive IEMs.
XBass & XSpace Sound Shaping — Two analog processing modes let you boost bass (XBass) or widen the soundstage (XSpace) with the press of a button. Both are analog, not digital EQ, so they don’t add distortion or artifacts.
Bluetooth & Connectivity
Bluetooth 5.2 with Hi-Res Codecs — Supports LDAC, LHDC/HWA, aptX Adaptive, aptX HD, aptX, AAC, and SBC for up to 24-bit/96kHz wireless audio. That covers every major phone and streaming service.
Built-In MEMS Microphone — Take hands-free calls with clear voice quality without switching to your phone’s speaker.
USB-C Charging — Charges via USB-C. Note: the USB-C port is for charging only—the GO blu Air does not work as a wired USB DAC.
Design & Portability
Magnetic Clip — A built-in magnet and included clip let you attach the GO blu Air to your bag strap, jacket, or pocket. It stays put without bouncing around.
ChronoDial Control — A rotary dial on the side handles volume, play/pause, and track skip—all without touching your phone.
Ultra-Compact and Lightweight — At roughly 53.5 × 33.7 × 19.5 mm and about 30 grams, the GO blu Air is smaller than a matchbox and lighter than an AA battery.
10-Hour Battery Life — A 450mAh lithium-polymer battery provides approximately 10 hours of playback on a single charge.
Quick-Reference Specifications
| Audio Performance | |
| DAC | Cirrus Logic MasterHIFI |
| Amplifier | Symmetrical twin-mono |
| Output Power (4.4mm BAL) | Up to 256 mW / 5.6 V |
| Signal-to-Noise Ratio | 110 dB |
| Output Impedance | <1 Ω (both outputs) |
| Sound Modes | XBass (bass boost), XSpace (soundstage expansion) — analog |
| Bluetooth & Connectivity | |
| Bluetooth | 5.2 (Qualcomm QCC5144) |
| Codecs | LDAC, LHDC/HWA, aptX Adaptive, aptX HD, aptX, AAC, SBC |
| Max Wireless Resolution | 24-bit / 96 kHz |
| Microphone | Built-in MEMS (for calls) |
| Headphone Outputs | |
| Balanced | 4.4mm Pentaconn |
| Single-Ended | 3.5mm S-Balanced |
| Battery & Power | |
| Battery | 450 mAh lithium-polymer |
| Battery Life | ~10 hours |
| Charging | USB-C (charging only; no USB DAC function) |
| Dimensions & Weight | |
| Dimensions | 53.5 × 33.7 × 19.5 mm (2.1″ × 1.3″ × 0.8″) |
| Weight | ~30 g (~1 oz) |
| Warranty | 1 year (US/UK); 2 years (EU) |
Frequently Asked Questions
Can I use the GO blu Air as a USB DAC with my computer?
No. The USB-C port on the GO blu Air is for charging only. It does not function as a wired USB DAC. If you need USB DAC capability, consider the original iFi GO blu or the iFi GO Link, both of which support wired USB audio.
What headphones work with the GO blu Air?
Any wired headphones or IEMs with a 3.5mm or 4.4mm plug will work. The 4.4mm balanced output is great for over-ear headphones and delivers the most power (up to 256mW). The 3.5mm S-Balanced output is ideal for sensitive IEMs thanks to its low output impedance and reduced crosstalk.
How does the GO blu Air compare to the original GO blu?
The GO blu Air is lighter, more affordable ($129 vs. $199), and uses a polymer chassis instead of brushed aluminum. It upgrades to Bluetooth 5.2 (from 5.1) and adds LHDC codec support. The original GO blu has a more premium metal build and supports USB DAC functionality. Sound quality is very similar between the two, according to reviewers at Major HiFi.
What do XBass and XSpace do?
XBass is an analog bass boost that adds warmth and punch to the low end—great for open-back headphones or IEMs that are light on bass. XSpace expands the soundstage for a wider, more open feel. Both are analog processes (not digital EQ), so they add minimal distortion. You can toggle each one on or off independently with button presses on the device.
How long does the battery last?
iFi rates the GO blu Air at approximately 10 hours of playback. Reviewers at eCoustics and Head-Fi.org confirmed battery life is close to that figure in real-world use. Charging is via USB-C.
Does it have a microphone for phone calls?
Yes. The GO blu Air has a built-in MEMS microphone, so you can take hands-free calls while using your wired headphones. No need to switch to your phone’s speaker or disconnect your headphones.
Will it drive high-impedance headphones like the Sennheiser HD 600?
According to reviewers at Major HiFi, the original GO blu had no problem driving the 300-ohm Sennheiser HD 600 models, and the Air matches its power output. That said, the GO blu Air is designed primarily for portable use with IEMs and efficient over-ear headphones. For demanding, hard-to-drive headphones, a desktop amp will give you more headroom.
How do I attach it to my clothing?
The GO blu Air has a built-in magnet and comes with a magnetic clip. Attach the clip to your bag strap, jacket, or shirt, and the GO blu Air magnetically snaps to it. It holds securely without bouncing around.
What Bluetooth codecs does my phone need to support?
The GO blu Air supports LDAC, LHDC/HWA, aptX Adaptive, aptX HD, aptX, AAC, and SBC. iPhones use AAC. Most Android phones support at least aptX or LDAC. Check your phone’s Bluetooth settings to see which codecs are available. The GO blu Air will automatically use the best codec your phone supports.
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