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iFi Audio

iFi Audio GO bar Ultraportable USB DAC/Amp

Introducing GO bar, an all new premium USB DAC/Amp from iFi Audio. Its the world’s most powerful headphone amp of its size and is best in its class bar none!

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“The GO bar 10th Anniversary Limited Edition is truly the 'gold standard' among ultraportable USB DAC/headphone amps."

Go, Go, GO!

The GO bar is iFi's' top-of-the-line ultraportable USB DAC/headphone amp. Connect to your laptop, MacBook, tablet or smartphone, or any other digital device with a USB port for sensational sound at home, in the office, or on the move. Whether you are commuting, working remotely or at your desk, or simply traveling for pleasure, the GO bar is the perfectly portable way to make headphones sound heavenly. Accessories include a leather travel case and a Lightning to USB-C, so there's no need to buy a Camera Connection Kit, plus a USB-C OTG cable and a USB-C to USB-A adapter.

Birthday bling!

To celebrate their 10th anniversary, we've created an eye-catching special edition of the GO bar. Limited to 1000 pieces, the 10th Anniversary Limited Edition GO bar is smothered in show-stopping gold-plating and boasts:

  • A copper chassis for enhanced build quality and shielding
  • Enhanced power supply filtering
  • A weight of 64g, 40g more than the original

The GO bar 10th Anniversary Limited Edition is truly the 'gold standard' among ultraportable USB DAC/headphone amps. Act fast, and place your order because "once it's GOne, it's GOne!"

Small. But mighty

The DAC section of the GO bar uses a powerful 16-core XMOS microcontroller to process the audio data received at the USB input. Our in-house team has programmed the XMOS firmware to optimize sound quality and ensure a perfect partnership with the GO bar's 32-bit Cirrus Logic DAC chipset. A customized digital filter minimizes pre-echoes and ringing artifacts. Our GMT (Global Master Timing) precision clock system ensures ultra-low jitter.

  • Ultra-res PCM up to 32-bit/384kHz via USB
  • Native playback up to DSD256
  • 2x DXD
  • Full MQA decoding
Suits you, sir

Four bespoke digital filtering options:

  • Bit Perfect -no digital filtering, no pre or post ringing
  • Standard -modest filtering, modest pre and posting ringing
  • Minimum Phase –slow roll-off, minimum pre and post ringing
  • Gibbs Transient Optimised –minimum filtering, no pre-ringing and minimum post ringing

Two analogue processing modes:

  • XBass+ -an analog bass boost to 'add back' lost bass response for a more accurate reproduction of the original
  • XSpace -a holographic sound field to open up your music to give you the spaciousness of a live concert
External affairs

The GO bar's smart alloy case sports physical buttons for precise volume adjustment and controls to select various sonic tuning options. A column of colored LEDs provides a handy guide to the format and sample rate of the digital audio currently playing, and whether XBass+ and/or XSpace are engaged. At one end is an asynchronous USB-C input, and at the other, a pair of headphone outputs.

  • 4.4mm fully balanced output – headphones with a balanced cable/connector can benefit from the fully balanced circuitry of the GO bar
  • 3.5mm S-Balanced output – our S-Balanced tech cuts crosstalk and noise by 50% with regular single-ended headphones.
Balance of power

Despite its diminutive size, the GO bar's analog circuitry sports a balanced circuit design with an asymmetrical twin-channel output stage. This reduces noise and crosstalk in the signal path by separating the left and right channels completely. This is usually found in larger and more expensive amplifiers. The circuitry is packed full of high-quality discrete components, and special attention has been paid to power supply filtering, too, dramatically reducing signal noise introduced through the USB input. Resulting in a stunning design that combines sonic purity with power of:

  • 475mW into 32 ohms
  • 7.5V into 600 ohms

No headphone amp of such a diminutive size can match the GO bar's ability to drive tricky headphone loads or work with a wider variety of headphones. The GO bar also incorporates two power tuning technologies:

  • iEMatch -attenuates power to suit high-sensitivity headphones and IEMs, it removes background noise and increases usable volume range
  • Turbo –ramps up the gain by 6dB to satisfy more power-hungry headphones

What's Included

• iFi Audio GO bar

• Lightning-to-USB-C cable

• USB-C-to-USB-C Cable

• Leather travel case

• USB-C to USB-A Adapter

• 1 Year manufacture warranty


• USB-C Digital IN

• BAL 4.4mm UnBAL 3.5mm Headphone Out

The Specs

DAC: Bit-Perfect DSD & DXD DAC by Cirrus Logic

Formats: PCM: 44.1/48/88.2/96/176.4/192/35, DSD: 2.8/384kHz 2.8/3.1/5.6/6.1/11.3/12.3MHz, DXD: 352.8/384kHz, MQA - Full Decoder

Balanced Output: 475mW@32Ω; 7.2V@600Ω, Single Ended - 300mW@32Ω; 3.8V@600Ω

Single Ended Output: 300mW@32Ω; 3.8V@600Ω

Output Impedance: <1Ω

SNR: 132dBA / 108dBA (BAL/UnBAL)

DNR: 109dB(A) / 108dB(A) (BAL/UnBAL)

THD+N: Balanced - 0.002% (6.5mW/2.0V @ 600Ω) / Unbalanced - 0.09% (100mW/1.27V @ 16Ω)

Frequency Response: 20Hz - 45kHz (-3dB)

Power Consumption: <4W-max

Weight: ~29g

Dimensions: (L)2.6" x (W)0.9" x (H)0.5"


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About iFi Audio

iFi audio is an award winning audio tech company with one aim in mind – to improve your music enjoyment. They create products that improve sound quality and eradicate noise, distortion and hiss from your Headphones, Speakers, Portable audio devices and Phones allowing you hear studio-quality audio as your favorite artists intended.