CAD GC3.1 Ground Control

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The CAD GC3.1 Ground Control is a passive high-frequency noise reduction system designed to improve audio system performance by converting high-frequency energy into heat. It works by connecting to audio component outputs or Earth ground connections, requiring specialized, low-impedance cables to effectively absorb noise from approximately 700kHz up to over 10GHz. The GC3.1 is a more powerful version for the main power earth and chassis, offering substantial noise reduction. Cables are available with a variety of terminations for £300 each, USB | Spade | RCA | XLR | Banana | RJ45 | HDMI plus special orders on request.

How it works

Passive operation:

The Ground Control is a passive device, meaning it has no active electronic components and does not pass current.

Internal composite:

It contains a proprietary composite “sandwich” of specialized materials that absorb high-frequency noise and convert it into heat.

High-frequency absorption:

The materials are effective over a wide frequency range, from the very high kHz range to over 10 GHz.

Purpose and application

Reduce high-frequency noise:

The primary goal is to reduce high-frequency noise that can degrade audio quality.

Connect to audio components:

It connects to any audio product with an unused output or input, like RCA, XLR, or USB.

Connect to Earth ground:

It can also be attached to the Earth connection of your audio system, such as a metal case screw or a dedicated earth post.

Ideal for noisy components:

It is particularly effective with noisy components like servers, phono preamplifiers, and preamplifiers that are sensitive to high-frequency noise.

Key features

Multiple connection sockets:

The GC3.1 features six 4mm banana sockets on the back for connecting to multiple audio components.

Low-impedance cables:

Connecting the Ground Control requires specialized cables designed for low-impedance high-frequency noise.

Additive effect:

The sonic improvement is often additive, meaning the more components connected to the Ground Control, the greater the overall effect.