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HomeMainsMains Conditioners CAD GC1 + GC3 Ground Control
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CAD GC1 + GC3 Ground Control

£1,995.00 – £4,595.00

  • Scott’s white paper here
  • The Ear GC-1 review here
  • The Ear GC-3 review here
  • HiFi+ review here
  • Stereotimes GC-1 review here
  • The Audio Beat GC-1 & GC-3 review here
  • The Audiohileman’s GC-1 & GC-3 review
  • GC1 includes 1 cable
  • GC3 includes 2 cables
  • If you are outside the UK please contact MCRU before purchasing any CAD product
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Description

If you are outside the UK please contact MCRU before purchasing any CAD product, thank you.

CAD believes that one of the key reasons so many digital audio products “sound digital” is due to high frequency noise. From the very beginning of CAD we have worked hard to reduce unwanted noise in all our products. Materials and technologies that are used in our 1543 MKII DAC , USB Cables and CAT are included in the GC1 and GC3 Ground Controls.  Over the past 10+ years the amount of high frequency noise on our Mains power has increased dramatically due to the use of computers, routers, modems, wifi, switch mode power supplies, etc.  The high frequency noise that is generated within our audio systems has also increased:  DACs, Servers, Computers, NAS drives, Routers, WiFi, etc. are all connected directly to our audio systems.

The Ground Control contains a mixture of materials that converts high frequency energy into heat.  Our research has found that to achieve the best sound quality the GC1 & GC3 needed to be effective over a large frequency range. This was not easy to accomplish!  The CAD Ground Controls will substantially reduce noise from very high KHz range up to over 10 GHz.

There are two independent voltage references in an audio system:

1) Signal Ground
2) Earth

Earth is what the third pin on your mains plug is connected to and what your copper pipes in your house are connected to. Earth is not typically (but occasionally is) connected to the Signal Ground in higher quality audio components.

Signal Ground is the negative side of an RCA, XLR, USB etc. connector.

Most audio engineers put a lot of effort into making sure the positive and negative rails of their DC power supplies have low ripple and noise, adequate bandwidth, etc. but typically not much thought is put into the signal ground plane.

CAD believes that reducing high frequency noise on Signal Ground and Earth improves sound quality.

Unfortunately there isn’t a common industry accepted technique for measuring noise levels on Signal Ground or Earth. A common measurement is Signal to Noise (S/N) ratio. S/N is the maximum output of a device (0dB) divided by the minimum output of a device (the noise). The reference for both of these measurements is Signal Ground. S/N measurement is not the whole story because it does not tell you anything about noise on the Signal Ground. You can have a very good S/N measurement and in reality the system can have considerable noise on the Ground side.

The CAD GC1 & GC3 Ground Controls can be connected to any audio product that has an unused output or input connection. If your DAC, streamer, computer, phone stage, preamplifier, amplifier, CD Player, NAS, etc. has a spare output/input connector like an RCA, XLR, Spade, USB or BNC you can connect the GC1 Ground Control to that. We supply a range of interconnects with various connectors. The other end of the interconnect has a single 4mm banana plug that attaches to the Ground Control.

There are two connectors on the back on the GC1 and six on the back of the GC3.

The GC1 or the GC3 Ground Control can also be attached to Earth. If you have any type of Earth connection on your audio system or power distribution CAD can supply you a cable with an appropriate connector that will fit.  The outside case of any audio component that is made from metal by law must be connected to Earth for safety.  So another option is to attach a Ground Control to the case directly by loosening a case screw and inserting a Ground Control cable with a spade connector.

We typically get the best results connecting the GC1 Ground Control to the device in your system that has the highest noise levels:  components like computers, audio servers, DACs, CD players, NAS, routers etc. or by connecting the GC1 Ground Control to mains Earth.  These are the best places to first try connecting the GC1 to.  The GC3 works exceptionally well connected to your mains Earth connection and directly to the cases of your amplification.

We also have had very good results connecting a Ground Control to phono preamplifiers.  The gain on these devices is large and the reduction of noise that the Ground Control provides has brought some amazing results.

Sound quality improvements that we feel occur with the CAD Ground Controls are:

• Dynamics
• Timing
• Soundstage becomes wider and deeper
• Tonally more correct – voice and instruments sound more realistic
• Blacker background – less noise

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CAD GC-R Ground Control

The Ground Control contains a mixture of materials that converts high frequency energy into heat. Our research has found that to achieve the best sound quality the GC1, GC3 & GC-R needed to be effective over a large frequency range. This was not easy to accomplish! The CAD Ground Controls will substantially reduce noise from very high KHz range up to over 10 GHz.
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CAD GC1 + GC3 Ground Control

£1,995.00 – £4,595.00
  • Scott's white paper here
  • The Ear GC-1 review here
  • The Ear GC-3 review here
  • HiFi+ review here
  • Stereotimes GC-1 review here
  • The Audio Beat GC-1 & GC-3 review here
  • The Audiohileman's GC-1 & GC-3 review
  • GC1 includes 1 cable
  • GC3 includes 2 cables
  • If you are outside the UK please contact MCRU before purchasing any CAD product
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Enacom UK AC Line Audio Noise Eliminators

£75.00
Remove mains noise from your system
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Ex-Dem iFi Audio Power Station – Mains Distribution Hub + MCRU No. 5

£649.99 £550.00
  • 2 units ex-dem in mint condition
  • Complete plug + play system
  • 6 way hub + No. 5 power lead
  • Grounding cable included
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Ex-Dem IsoTek EVO3 Corvus Mains Conditioning Block

£695.00 £540.00
  • 1 UNIT UK SOCKETS EX-DEM WITH BOX
  • NO OTHER OFFERS APPLY
  • Easy 'plug-n-play' set-up
  • 9 clean power fully star earthed outlets
  • Suitable for a complete audio or AV system
  • Component from component isolation
  • 13,500 Amps of instantaneous protection
  • Supplied with IsoTek EVO3 Premier power cable
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Ex-Dem IsoTek EVO3 Sirius Mains Power Block

£575.00 £475.00
  • EX-DEM MODEL IN BLACK 1 ONLY WITH £100 OFF
  • 6 Way Audiophile Block
  • Star Earthed
  • Conditions and Protects
  • Suitable for all electronics including integrated amps and up to 100W power amplifiers
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Harmonix Reimyo ALS-777 Mains Conditioner

£4,250.00
Pure power for perfect clarity.
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IFI AUDIO GROUNDHOG+ GROUNDING SYSTEM

£59.00 £45.00
  • The Groundhog+ has a variety of adapters and works with every device on the market.
    • RCA base cable For any audio system with an unused RCA socket
    • USB converter For computer audio systems
    • Spade converter For power supplies with a DC barrel connector
    • 3.5mm Y-converter For portable devices with an unused 3.5mm connection
    • Banana / RCA (male cable) For grounding with AC iPurifier to equipment)
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IFI AUDIO iPOWER

£49.00
When is a plug no ordinary plug? When it’s an iFi iPower. Use an iPower to replace your regular power supply for clean, noise pollution free power. Technical Notes: Click here to download
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iFi Audio Power Station – Mains Distribution Hub

£499.00
  • In stock
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Additional information
Weight 5 kg
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GC1, GC3

Brand

Cad

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Furutech FP-203 Rhodium-Plated Spade Connectors

£34.95
  • Set of four Audiophile-quality
  • Rhodium-Plated over UP-OCC Copper spade connectors
  • Perfect for budget and high-end speaker cables alike
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Tellurium Q Blue RCA Interconnects

£180.00 – £614.00
  • New and reinvented Tellurium Q Blue Interconnect
  • New version entry level RCA
  • Sold from stock in 1 metre lengths or supplied to order in longer lengths
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The Ultimate Linear Power Supply for Chord QuteHD

£395.00
# Massive Sonic Up-Grade # Our Best PSU # Pure Silver Cabling
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40+ years tinkering with hifi cables + accessories has taught us a lot of things. If you want to get the improvements we have in our hifi system then you have come to the right place.

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CAD GC1 + GC3 Ground Control

£1,995.00 – £4,595.00 Select options Wishlist