iFi iDefender Max USB-C Ground Loop Breaker and USB Power Injector
Best audio solution for eliminating unwanted USB ground loop noise.
Eliminate annoying ground loop noise from your USB audio setup with the iFi iDefender Max USB-C. This device functions as both a ground loop breaker and a USB power injector, ensuring your system receives clean power. It intelligently detects and disconnects ground loops using the IsoGround feature while USB Noise Termination cuts noisy power at the input. Built with an aluminum housing for durability and cooling, it features a dedicated USB-C port for streamlined cable management. It supports high-speed USB 3.0 data transfer and handles substantial power input for broad compatibility. Included accessories are the unit, a 5.5x2.1mm to USB-C Cable, and an Instruction Card.
$79.00
Owner Satisfaction
4.6
/ 5
Category Rank
105
/ 221
#105 in Electronic Filters
Price vs Category Average
-68%
Below average
Input/Output
USB-C
/ USB-C
Who it's for
- Audiophiles struggling with persistent ground loop hum and electrical noise
- Listeners seeking cleaner power for their sensitive USB DACs
- High-resolution audio fans requiring stable, uninterrupted data transmission
Who should skip it
- Budget-conscious buyers avoiding additional accessory costs
- Laptop users with limited or cramped port configurations
- Users troubleshooting noise issues unrelated to the USB power path
Performance breakdown
Noise Floor Reduction
Effectively eliminates persistent ground loop hum from complex digital audio chains.
Power Delivery Capacity
Handles up to 100W, ensuring stable power for demanding high-end DACs.
Build Integrity
Aluminum housing provides excellent thermal dissipation and long-term structural durability.
Data Throughput
USB 3.0 support maintains high-speed data integrity without introducing signal latency.
Setup Simplicity
Plug-and-play functionality makes isolating noisy power paths remarkably straightforward.
Cable Management
USB-C connectivity streamlines desktop setups by reducing unnecessary cable clutter.
Key Specs
Input/Output
USB-C
Compatibility
USB 3.0
Max. Power Support
Up to 100W (20V/5A)
External Power Support
Up to 25W (5V/5A)
Housing Material
Aluminium
Warranty
1 year limited iFi warranty
Features
- Intelligent auto ground loop detection and disconnection
- Effectively cuts noisy USB power at the input
- Dedicated USB-C port for clean external power
- Compatible with high-speed USB 3.0 data transfer
- Streamlined cable management via USB-C connectivity
- Robust power handling up to 20V/5A
- Durable aluminum housing enhances cooling
What customers say
The iFi iDefender Max USB-C is overwhelmingly praised for its core function: effectively eliminating frustrating ground loop noise like hum and buzz from digital audio setups. Users consistently report that this device instantly creates a dramatically cleaner and darker sonic background, significantly improving sound quality when connecting DACs or interfaces to computers. A key feature valued by many is the USB power injector port, which allows for superior performance using an external power supply instead of noisy computer bus power. While priced at a premium, the consensus is that its ability to solve complex noise issues where other solutions fail fully justifies the investment, leading to high user satisfaction.
Know before you buy
The device uses IsoGround technology to intelligently detect and disconnect the ground path of your USB connection. By breaking the ground loop, it prevents the electrical interference that typically manifests as a hum or buzz in your audio signal.
You don't strictly need one to break a ground loop, but if your USB device requires more power than your source can provide, or if you want to inject cleaner power, you can connect a dedicated power supply to the side USB-C port.
No. The iDefender Max is fully compatible with USB 3.0 standards, ensuring that high-speed data transfer remains unaffected while the device cleans your power signal.
Yes, the unit is built to handle substantial power, supporting up to 100W (20V/5A). This makes it robust enough for demanding setups that require significant power delivery.
Yes, the aluminum casing acts as a heat sink. It helps dissipate heat efficiently, which is particularly important when the device is handling higher power loads.
The package includes the iDefender Max unit, a 5.5x2.1mm to USB-C cable for external power injection, and an instruction card to help you get set up.
Still have a question?
Ask Hayley anything about this product before you decide.