iFi Audio GO Blu Air

GO Blu Air represents the new generation of portable audio converters from iFi Audio. Weighing just 30 grams and standing 5 centimeters tall, this ultra-compact Bluetooth DAC features a triple-stage audio design inherited from traditional hi-fi systems. Compatible with all current high-resolution codecs and equipped with a detachable magnetic clip, it turns any wired headphone into a high-performance wireless solution, while preserving outstanding sound quality thanks to its Cirrus Logic MasterHIFI chip and dual-mono amplification.

A miniaturized design with no technical compromises

GO Blu Air takes a radically different approach from its competitors. Whereas most Bluetooth dongles rely on a single chip handling reception, conversion, and amplification simultaneously, iFi Audio uses three distinct stages, each optimized for its specific function. This design philosophy, directly inspired by stationary hi-fi chains, delivers superior sound quality despite its Lilliputian dimensions.

The housing, built from a high-density polymer favorable to Bluetooth transmission, measures 53.5 × 33.7 × 19.5 mm. This extreme compactness still allows for the inclusion of a removable magnetic clip, a practical innovation that lets you attach the device to a pocket, belt, or bag strap without any extra accessory. Its featherweight 31 grams quickly makes it unnoticeable in everyday use.

The top panel features two headphone outputs: a 3.5 mm jack with iFi’s exclusive S-Balanced technology, and a 4.4 mm balanced Pentaconn output. This dual connectivity, unusual for a device of this size, underscores the British manufacturer’s technical ambitions. A multicolor LED indicates the active EQ mode, while the bottom panel houses the USB-C port, MEMS microphone, a reset button, and a status LED.

The ChronoDial: watchmaking precision in the service of audio control

The most distinctive element of GO Blu Air is its ChronoDial, a control wheel directly inspired by mechanical watch crowns. This centerpiece combines anti-corrosion brass components, a stainless steel bearing with a copper–cobalt–beryllium coating, a high-purity nickel spring, and a CNC-machined aluminum central button.

This sophisticated construction delivers an exceptionally precise tactile feel. Each detent provides distinct haptic feedback, enabling fine volume adjustments even without looking. The multifunction central button handles play, pause, track navigation, and voice assistant activation. In a world dominated by touch controls, this mechanical interface brings a particularly satisfying sensory dimension to everyday use.

The ChronoDial’s build quality far exceeds what you’d typically expect at this price point. Machining tolerances are remarkably tight, eliminating any unwanted play, and the mechanism maintains its precision even after thousands of actuations.

A sophisticated audio signal chain

The Bluetooth reception stage is built around Qualcomm’s QCC5144 chip, compatible with Bluetooth 5.2. This new generation delivers improved connection stability and lower power consumption compared to the GO Blu’s QCC5100. Compatibility with LDAC (up to 990 kbps), LHDC/HWA, aptX Adaptive, aptX HD, classic aptX, AAC, and SBC ensures optimal transmission regardless of the source device.

The digital signal then passes to a Cirrus Logic converter certified MasterHIFI. This rarely awarded certification attests to an ultra-low noise floor, wide dynamic range, and impeccable signal integrity. The DAC is paired with a custom digital filter minimizing pre-ringing and ringing artifacts, as well as a precision clock system that drastically reduces jitter.

Amplification uses a dual-mono topology with perfectly symmetrical signal paths for each channel. OV Series operational amplifiers run in Class A, assisted by TDK C0G and multi-layer muRata capacitors selected for their linearity and low distortion. This Direct Drive configuration eliminates output coupling capacitors, preserving signal purity all the way to the transducers.

Electroacoustic performance and listening modes

The 4.4 mm balanced output delivers a remarkable 262 mW into 32 ohms (2.9 V) and maintains 52 mW into 600 ohms (5.6 V). The 3.5 mm S-Balanced output delivers 165 mW into 32 ohms and 14 mW into 600 ohms. Output impedance under 1 ohm on both connectors ensures optimal compatibility with ultra-sensitive in-ear monitors as well as demanding over-ear headphones.

Signal-to-noise ratio and dynamic range both reach 110 dBA, exceptional values for a portable device. Total harmonic distortion stays below 0.009% on the balanced output (600 ohms, 2 V) and below 0.03% on the S-Balanced output (16 ohms, 1.27 V).

Two analog processing modes expand sonic possibilities. XBass intelligently reinforces low frequencies without introducing hum, particularly useful with open-back headphones that are naturally light in the bass. XSpace widens the soundstage to create a more natural three-dimensional sense of space, turning closed-back listening into a more airy experience. These are applied via dedicated analog circuits rather than DSP, preserving the integrity of the original signal.

Optimized communication and battery life

The integrated MEMS microphone benefits from Qualcomm algorithms for ambient noise suppression and echo cancellation. This technology, derived from professional call center environments, enables surprisingly clear phone calls even in noisy surroundings. Voice assistants (Siri, Google Assistant) respond instantly, turning GO Blu Air into a truly hands-free communication interface.

The 450 mAh lithium-polymer battery provides up to 10 hours of continuous listening—enough to cover a Paris–New York transatlantic flight. USB-C charging accepts currents up to 1 A for a full charge in under two hours. An intelligent thermal management system preserves battery longevity by avoiding detrimental charging cycles.

Technical specifications

Wireless connectivity

• Chipset: Qualcomm QCC5144
• Version: Bluetooth 5.2
• Supported codecs: LDAC, LHDC / HWA, aptX Adaptive, aptX HD, aptX, AAC, SBC

Audio processing

• DAC: Cirrus Logic MasterHIFI
• Architecture: triple-stage (reception / DAC / amplification)
• Amplification: dual-mono with discrete components
  • OV Series operational amplifiers
  • TDK C0G and Murata capacitors

Outputs and performance

• Connectors: 4.4 mm balanced / 3.5 mm S-Balanced
• Power (RMS):
  • 4.4 mm: ≥ 262 mW (2.9 V @ 32 Ω), ≥ 52 mW (5.6 V @ 600 Ω)
  • 3.5 mm: ≥ 165 mW (2.3 V @ 32 Ω), ≥ 14 mW (2.9 V @ 600 Ω)
• Output impedance: < 1 Ω (both outputs)
• Signal-to-noise ratio (SNR): ≥ 110 dBA
• Dynamic range (DNR): ≥ 110 dBA
• Total harmonic distortion (THD+N): ≤ 0.009% (balanced, 600 Ω, 2 V); ≤ 0.03% (S-Balanced, 16 Ω, 1.27 V)

Advanced audio features

• XBass: bass enhancement
• XSpace: soundstage expansion
• Control: ChronoDial™ (volume and navigation)

Built-in microphone

• Type: integrated MEMS
• Processing: noise and echo suppression
• Compatibility: voice assistants, hands-free calls

Power and battery life

• Battery: 450 mAh lithium-polymer
• Battery life: up to 10 h
• Charging: USB-C (5 V / ≥ 1 A)

Design and dimensions

• Mounting: detachable magnetic clip
• Chassis: compact and portable
• Dimensions: 53.5 × 33.7 × 19.5 mm
• Weight: 31 g