iFi Audio SilentPower Groundhog+ Ground Loop Isolator for Audio Systems

iFi SilentPower Groundhog+

The SilentPower Groundhog+ is a purpose-built audio grounding solution designed to eliminate persistent hum, buzz, and interference caused by a missing earth/ground connection in your system. By restoring a proper ground path, Groundhog+ helps your setup drain unwanted noise and recover the shielding your gear expects—often delivering a cleaner background with improved perceived resolution, bass definition, and musicality.

What makes Groundhog+ especially effective is its adaptable grounding kit, built to integrate with virtually any setup—from traditional hi-fi systems and DACs to computer audio rigs and portable devices. Simply choose the adapter that matches an unused connection on your device (RCA, USB, DC barrel power, or 3.5mm), then establish the ground link to help stop noise at the source. It also pairs with the AC iPurifier for a “dual attack” approach—combining grounding with interference reduction for even more robust noise control.

What It's Good At:

• Eliminating hum and buzz caused by a missing earth/ground connection
• Restoring proper shielding to reduce background noise and interference
• Improving perceived clarity, resolution, and bass control by lowering noise floor
• Working with hi-fi, DACs, phono stages, amps, and powered speakers using an unused RCA socket
• Supporting computer audio via USB grounding and portable audio via 3.5mm grounding options
• Enabling a dual-noise solution when used alongside the AC iPurifier

iFi SilentPower Groundhog+ Full Specifications:

• Product Name: Groundhog+
• Brand/Line: SilentPower
• SKU: 03-06-022-0003-00
• Primary Function: Establishes a ground/earth link to reduce hum, buzz, interference, and related noise caused by missing grounding
• System Compatibility / Connection Methods:
  • RCA grounding via unused RCA socket (common for amps, DACs, phono stages, and similar components)
  • USB grounding for computer audio systems (USB to RCA adapter)
  • DC power supply grounding for devices with a DC barrel connector (DC spade to RCA adapter)
  • 3.5mm grounding for portable devices with an unused 3.5mm connection (3.5mm to RCA female L&R adapter)
• Included Cable/Adapter Set (Groundhog+ Kit):
  • GH1: IEC (earth pin only) → RCA (male)
  • GH2: USB → RCA (female)
  • GH3: DC spade connector → RCA (female)
  • GH4: 3.5mm → RCA (female), L & R
  • GH5: 4mm → RCA (male)
• AC iPurifier Compatibility: Supports grounding with AC iPurifier using a banana → RCA (male) grounding cable (banana to AC iPurifier, RCA to amplifier)
• Dimensions: 20.4 × 9.2 × 4.8 cm
• Net Weight: 340 g
• What’s in the Box:
  • 1× Groundhog+ kit (IEC to male RCA, female RCA to DC spade, female RCA to male USB-A, female RCA to male 3.5mm)
  • 1× User Manual
• Important Note (Power/Earth Requirement): An IEC plug-equipped mains cable with Earth is required to make the connection to mains Earth; this cable is not supplied as part of Groundhog+
• Color Note: Product color may vary due to lighting; refer to the actual product for accuracy

iFi SilentPower Groundhog+ Q&A:

How can I tell if Groundhog+ will fix my system’s hum or buzz?

Use the “touch test.” If the noise decreases when you touch your device and increases when you let go, your system likely lacks a proper earth/ground connection—Groundhog+ is designed for this scenario.

What if the hum doesn’t change when I touch the device?

If the noise does not decrease during the touch test, it often indicates a ground loop from multiple earths rather than missing grounding. In that case, a ground-loop solution is typically more effective than adding an earth link.

What does Groundhog+ actually do?

It creates a controlled ground/earth link so unwanted noise can drain away, helping restore the shielding your audio system expects and reducing interference that can cause hum and buzz.

Which devices can I use Groundhog+ with?

Groundhog+ is designed to work with most setups, including amps, DACs, phono stages, powered speakers, computer audio systems, and portable devices—using the included RCA, USB, DC spade, and 3.5mm adapter options.

Do I need an unused port to use Groundhog+?

Yes. Groundhog+ typically uses an unused connection (such as an unused RCA socket, USB, DC power connection point via adapter, or an unused 3.5mm jack) to create the ground link.

Can I use Groundhog+ with my computer audio setup?

Yes. The included USB-to-RCA (female) adapter allows you to integrate grounding into many computer audio systems where USB is the practical connection point.

Can I ground portable devices with Groundhog+?

Yes. If your portable device has an unused 3.5mm connection available, Groundhog+ can be used with the included 3.5mm-to-RCA (female) L&R adapter to add an earth link.

What do I need to connect Groundhog+ to mains earth?

You’ll need an IEC plug-equipped mains cable with Earth to make the connection to mains Earth. That specific mains cable is not included with Groundhog+.

iFi SilentPower Groundhog+ Downloads:

iFi SilentPower Groundhog+ Connection Guide