Entreq
Swedish maker specialising in grounding. Entreq build passive boxes filled with mineral and metal compounds that give stray noise on a component's chassis somewhere to go, rather than filtering the mains.
About Entreq
Quick Access
What Entreq mean by grounding, and why it is not mains conditioning
Entreq work on a problem most of the industry addresses from a different direction. Mains conditioners clean the electricity going into a component. Entreq's ground boxes do nothing to the mains at all. They give noise that has already accumulated on a chassis a path away from the signal circuitry.
The boxes are passive and contain no electronics. They are filled with a mix of minerals and metals that Entreq will not fully specify, connected to a component's earth or chassis point by a dedicated cable. There is no filtering, no active circuit and nothing in the signal path, so there is nothing in the chain that can add distortion of its own. It remains a system-dependent product: some components respond far more than others, and a ground box is not a substitute for a mains protective earth.
That is worth saying plainly, because grounding is an area where scepticism is reasonable and Entreq attract more of it than most. It is a product best judged in your own system rather than argued about in the abstract.
Per-Olof Friberg founded the company in Sweden and still owns it. He spent more than thirty-five years as a farmer before releasing the first Tellus ground box in 2007, and says that work is where his thinking came from. Alongside grounding, Entreq make cables, racks, passive mains conditioners and isolation products, all using the same materials thinking.
Browse by Range
The grounding boxes climb from Primer through Silver Tellus to Olympus and the larger reference units. Ground cables are sold separately and matched to the box, so check the pairing before ordering.
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£2,250.00Ex. VATUnlock greater audio clarity with the Entreq Sudoku Digital Signal Cable. Engineered to reduce interference and jitter, it ensures clean, precise signal transmission for a more dynamic listening experience. Available in multiple configurations to suit your setup. -
From£3,000.00Ex. VATExperience cleaner audio and deeper detail with the Entreq Revelation Speaker Cable. Its high-grade conductors and advanced design reduce signal loss and interference, enhancing overall sound quality. Compatible with a wide range of systems, it’s ideal for serious listeners ready to elevate their audio experience.
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£3,083.33Ex. VATThe Olympus Infinity T is Entreq's highest-performing single-cell ground box, featuring the highest quality mixture of minerals and metals and incorporating tungsten. It features two ground-posts which can be used to ground two low-voltage components- but since it is a single zone of grounding it cannot be used for speaker output grounding. For multiple zones of grounding, take a look at Entreq's tri- and multi-cell offerings which offer better value for money than purchasing multiple single-cell boxes.
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From£3,166.67Ex. VATThe Entreq Olympus Digital Signal Cable is a hand-crafted digital cable available in BNC, RCA, RJ45 network, USB and XLR formats, all built with Entreq's triple EEDS construction. Entreq single out its organic, analogue character, which sets it apart from digital cables that can carry a harsh edge. Like all Olympus cables it requires an accompanying Entreq ground box, sold separately. -
From£3,333.33Ex. VATThe Entreq Sudoku Power Cable reduces electrical noise and interference to reveal clearer, more dynamic sound from your audio system. With advanced materials and wide compatibility, it enhances performance across a range of components. Perfect for audiophiles seeking cleaner power and better sonic precision. -
From£3,750.00Ex. VATThe Entreq Olympus Speaker Cable is a hand-crafted speaker cable built with Entreq's triple EEDS construction, supplied in a standard 2.2m length. Like all Olympus cables it requires an accompanying Entreq ground box, and because speaker cables carry more current and generate more magnetism, Entreq recommend a higher performance box than for signal cables. -
£8,333.33Ex. VATThe Olympus Ten Ten is a multi-cell offering from Entreq, combining 10 Olympus Ten T cells in a single chassis to provide grounding for your entire system! Each solid-silver ground post can ground equipment weighing up to 14kg, and the incorporated Cleanus technology gives passive filtration to your system. 10 Olympus Ten T units and a Cleanus unit would cost over £15,000 if bought indiviudally, so the Olympus Ten Ten offers a significant saving. -
From£12,000.00Inc. VATThe Entreq Olympus Signal Cable is a hand-crafted analogue interconnect available with RCA or XLR terminations, built using Entreq's triple EEDS construction. It combines copper, silver, wood and cotton, materials chosen to give the cable its own character. Like all Olympus cables it requires an accompanying Entreq ground box, sold separately, to work as intended.
