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iFi Audio

iFi Audio iDefender3.0 USB Ground Loop Isolator

SKU #L52811000000000
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49.0 $49.00
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Ground elimination for digital listening.

The iDefender3.0 plugs into your computer USB port and auto-detects if there is more than one ground and will ‘intelligently’ disconnect the computer ground for cleaner sound quality. If the DAC is USB powered, the iDefender3.0 requires an external 5v to break the ground.

Super strength
Listening to music on a DAC? Then couple the iDefender3.0 with the iFi iPower (5v) for a superhero team that halts hiss and crackle in its tracks from hampering playback enjoyment. By adding the iPOWER 5v, a clean, quiet USB power supply is injected into the audio stream to enhance enjoyment.

Cutting edge USB3.0
The better, faster USB3.0 connection equals even better sound quality, as the wire gauge specification is more exhaustive and the connections are better.


  • Intelligent detection and solving of ‘ground loops’
  • Breaks ground loops in the correct way
  • Kills USB power noise by breaking the noisy power supply
  • Reduces system noise floor and makes for better dynamic contrast, warmth and resolution

Love great audio? Put the finishing touches on perfection. Order today.


iDefender3.0 USB Ground Loop Isolator Specifications:

  • Super-Speed USB3.0 (and USB2.0 backwards compatible)
  • Connec­­tors: USB3.0 gold-plated connectors
  • Dimensions: 48 (l) x 18 (w) x 8 mm (h)
  • Weight: 6.5g (0.23oz)
  • Warranty period: 12 months

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  • Free Standard Ground shipping (48 contiguous states, some overweight and Used/Vintage items excluded).
  • Orders placed before 3 p.m. ET usually ship the same business day.
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2-Year Free Warranty on Guitars

Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects.

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