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iFi Audio iDefender 3.0+ USB Ground Loop Breaker USB A to USB A IFI IDEFENDER+ In recent years, more and more music lovers have taken to using computers as their primary audio source. These are often connected to audio gear via USB – the universal interface that enables digital data to pass from one piece of hardware to another. The iDefender+ is a more specialised USB audio device, specifically designed to tackle ground (or earth) loops that can cause real issues with some computer-based systems, typically resulting in an irritating buzz or hum from the speakers. The iDefender+ upgrades the performance of the outgoing iDefender3.0 with the addition of low-ESR Tantalum capacitors for input and output filtering. It, too, is available in three versions to .
This fixed the horrible, high pitched 'whine' i was getting through powered monitors and headphones. Had tried various in line power conditioners etc, and they never solved the issue. I was about to employ an (expensive) electrician to try and fix the problem, and I found a video on YouTube about this product, and how it fixed the exact noise i was getting.Found a used one on here for £30, plus a cheap 5 volt power supply for £10. Plugged all audio items into a single 6 way power block, and put the iDefender on the usb input on my PC that my Audio interface was using.
You HAVE to use it with the power supply to lift the earth on the interface.
Eliminated the ground loop from my PC laptop.
The laptop is interconnected with many analogue and digital audio devices. Considering the iFi was placed on the MIDI part of the setup it did a good job of suppressing the noise coming through from the USB C port.
Thanks.