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To achieve the optimal performance from both RCA & XLR signal cable’s they require a ground cable for L & R channels, as well as a ground box solution to connect to. The appropriate ground cables & ground box should be chosen as carefully as the interconnects themselves. Careful matching will optimize the level of performance for each individual system.
Wherever possible digital cables and analogue signal or speaker cables should run to independent grounding stations. This reduces the modulation of high frequency noise sharing the same ground plane as the analogue signal cables. Ground cables are available in standard 1.65m lengths but can be specially ordered in the length required. This often helps with the correct positioning of the chosen Ground Box.

All speaker cables require 2 x Ertha 3.5 ground cables & a ground box solution. They can of course share other analogue connections to either a Tellus or Silver Tellus. As with all Entreq cables, careful selection of the appropriate ground cables & Ground box solution will affect the overall performance of the speaker cables.
Digital, Clock & AES/EBU cables are only available in increments of 0.55m. To obtain optimal performance from this range of cables each of these cables requires a dedicated ground cable which in turn needs to be attached to one of the Ground Box solutions. Where possible please try to use an independent Ground Box, for both the Clock & Digital cables, this is to minimise high frequency ground plane noise which could affect the performance of both the analogue & Digital cables.
For optimal performance, at an additional cost, all USB cables require a ground cable & amp; a Ground Box solution.
choicehifi Says:
Choice HiFi- Background and Overview of Entreq Grounding and Cable Solutions
Entreq takes a unique and comprehensive approach to cable design. Tackling the often-overlooked factors affecting cable and therefore equipment performance.
The premise of their design philosophy is based on solving effects know to the Aerospace and other high tech industries but never before systematically applied to high-end audio cables.
These are:
1. Our equipment is being constantly bombarded by RF and EMI radiation.
2. Modern homes and their electrical supplies are plagued by switching power supplies and heavy appliances.
3. All cables act as sending and receiving antennas
4. Connectors have to be adapted according to the signal being processed. The cable, signal/mass interface is crucial to accurate signal transmission.
5. A current traveling in a wire creates a magnetic field.
6. Careful attention has to be paid to ground planes. (In space of course there is no “earth” so an artificial ground has to be created)
Entreq has uniquely designed and developed a whole system approach to tackle and address each of the above issues, by doing the following:
1. Separate cable for positive and negative signals.
2. Asymmetrical design.
3. Positive and negative cables are spun clockwise and anticlockwise respectively.
4. Adapted lengths to minimise the antenna effect.
5. DIC Dedicated contacts so the area and the mass of the contacts correspond to
the cable.
6. Wood in the contact framework – Non-magnetic and non-conductive.
7. Only pure copper and silver in the signal paths. No alloys.
8. Drain wire instead of shielding in order to connect to a pure earth point (External Earth Drain System).
9. Cotton covering instead of synthetic materials.
10. EEDS External Earth Drain System.
The result is that Entreq cables and grounding solutions maintain the integrity and purity of the audio signal, resulting in:
1. Lower noise floor
2. More detail
3. Darker backgrounds
4. Increased dynamic range
5. Better soundstage
6. A more natural tonal quality
7. Loss of leading edge glare
8. More and better defined bass
Entreq solution can be applied either individually or as part of a complete system approach. The more you do the better the result.