Atlas Mavros Grun Ultra 2 RCA to 2 RCA Audio Cable Pair
Usage Guide
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Connection Guide
RCA Pair
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Item code: Atlas Mavros Grun Ultra Audio
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SPEAKER CABLES:
A quantity of 2 means you will receive a pair of speaker cables e.g. for your front left and front right speakers. By entering a quantity of 1, you will get a cable for a single speaker e.g. centre speaker and this option also enables you to vary the length (and termination) of your cable for each speaker.
OTHER CABLES:
A quantity of 1 means you will receive a single cable in the case of aerial, satellite, subwoofer, digital coaxial & optical cables and a pair of cables in the case of 2 rca to 2 rca analogue audio cables.
NON-CABLE PRODUCTS:
A quantity of 1 means you will receive 1 of the specified products.
Order before 4pm (Mon–Fri) for same-day dispatch
Atlas Mavros Grun Ultra 2 RCA to 2 RCA Audio Cable
RCA interconnect cable based on the same design objectives and manufacturing techniques developed for Atlas' Asimi range, utilising copper rather than silver conductors. The new generation Mavros now features the Grun Coherent Earthing System.
The Mavros Ultra RCA uses the very highest quality ‘6N’ (99.99997% purity) copper manufactured using the OCC ‘Ohno Continuous Cast’ technique. Cables manufactured with lower grade materials and poor manufacture typically have a coarse, grainy structure which compromises sound quality. In the manufacture of Mavros, Atlas maximise the copper’s conductivity by ensuring that there is typically one grain in approximately 125 metres of conductor, allowing the signal a continuous unbroken path –in practice, the signal has a faster, cleaner and more direct path to follow.
The cable consists of a pair of conductors, each made up from six bundles of 12 multi-conductor wires, plus a thicker centre wire. This in turn is covered by a continuous copper/Mylar™ electrostatic screen with copper shielding braid, ensuring minimal susceptibility to RF interference and noise.
Theoretically, the best dielectric (insulation layer) is air. Conventional dielectric (insulation) materials impose their own signature distortion and loss on the signal. Atlas' technique uses a microporous PTFE (Teflon™) tape, which is wound around the core conductors, then covered again and stabilised using a protective FPE (Flexible PolyEthylene) dielectric. This process maintains the required conductor geometry, and bestows greater manufacturing consistency. Termination is with Atlas' low mass, high bandwidth, cold-weld Ultra RCA or XLR connectors, both of which have minimal effect on the integrity of the signal.
Features :
- Ultra RCA Plugs
- OCC Copper Conductors
- PTFE Dielectric
- Twin Multi-Core Construction
- Dual Drain ('DD') Technology
- Grun Coherent Earthing System
- Supplied with 1x Grun Achromatic RCA Adaptor to 2 Female Connectors
Ultra RCA Plug
The Ultra is a wide-band, OCC copper, constant impedance, self-cleaning, solder-free construction RCA plug.
In Atlas' cables, the conductor to plug interfaces are solder free, and the gold-plated conjugate brackets act as the return signal path, helping to reject RFI. Both conjugate brackets (these grip the cable without the adverse effects of compressing it, which can alter impedance) have two asymmetrical leaves which spring open on insertion and wipe clean the signal path. To maintain a clean signal path, simply remove and re-insert them periodically.
The Ultra RCA connectors utilise low-mass non-magnetic connectors to minimise the negative effect of excessive metal in the plug itself.
Ohno Continuous Casting Copper (OCC Copper)
The Ohno continuous casting method re-heats the extrusion as the molten copper is forced out of the mould and very slowly and gradually draws the grain or crystal down the conductor''s length, creating a ‘single crystal structure.’ Actually, because no copper is 100% pure, there will always be a few boundaries produced by impurities. The frequency of boundaries created are quite insignificant. A typical crystal in a copper conductor drawn to 0.3 mm diam. using the OCC process is 125.00 metres long!
The benefits are obvious, with almost no crystal boundaries, the audio signal is no longer impeded down the copper wire and more information and detail is delivered faithfully to the receiving equipment.
| Copper Purity Comparison (0.3mm Diameter) | ||||
| TPC | OFC | OCC | ||
| Purity | >99.9% | >99.99% | >99.999% | |
| Specific Gravity | 8.75 | 8.926 | 8.938 | |
| Gas Impurities (ppm) | ||||
| O2 | 200~500 | <10 | <5 | |
| H2 | <0.5 | <0.5 | <0.3 | |
| Average Crystal Size (Metre) | 0.007 | 0.02 | 125.00 | |
| Crystals Per Metre | 150 | 50 | 0.008 | |
PTFE Dielectric
PVC (Poly Vinyl Chloride) is cheap to produce and, as such, is the most commonly used insulation in AV cables. However, PVC is the worst quality insulation a Hi-Fi or AV signal can encounter as its high loss causes a significant reduction in signal velocity. PVC is better suited to power cables and should be avoided in Hi-Fi and AV signal cables.
Other dielectrics in common use are Polyethylene, Polypropylene and Polytetrafluoride Epoxy (better known as PTFE (Teflon™) or Teflon,) and the new and unique Atlas (PTFE).
Microporous PTFE (Teflon™) is a unique, low density dielectric material, phase stable at room temperature, which offers significant performance improvements over solid PTFE (Teflon™) dielectric designs.
The table below shows the properties of a selection of dielectrics. Though not used as a dielectric in Atlas' cables, PVC is included for comparison purposes.
| Dielectric Material Comparison (0.3mm Diameter) | |||||
| Property | Polyvinyl Chloride (PVC) |
Foamed Polyethylene (PEF) |
Polypropylene (P.P) |
Teflon (FEP or PTFE) |
PTFE |
| Dielectric Constant (@ 50 -106Hz) |
4-8 | 2.3 | 2.25 | 2.1 | 1.3 |
| Dielectric Strength (kV mm-1) |
23-30 | 30-50 | 30-50 | 20-25 | N/A |
| Loss Tangent (% @ 50 - 106Hz) |
8-15 | 0.02-0.05 | 0.02-0.06 (@ 106Hz) |
0.02-0.07 | N/A |
| Volume Resistivity (Ohms.cm @ 20°C) |
1012-15 | >1017 | 6.5x1014 | >1016 | N/A |
| Tensile Strength (Kg mm-2) |
1.0-2.5 | 1.0-2.0 | 3.0-4.0 | 1.9-2.2 | 1.0 |
| Melting Point (°C) |
-130 | 112-120 | 155-160 | 275 | 275 |
| Max. Continuous Operating Temp. (°C) |
60 | 75 | 90 | 200 | 260 |
| Min. Operating Temp. (°C) |
-15 to -40 | <-60 | -5 to -45 | <-60 | -250 |
Twin Multi-Core Construction
A pair of identically matched conductors (one for signal path, the other acts as the return conductor) enclosed within a non-conducting screen. Combined with Atlas' DD (dual drain) system which avoids distortion of the screening braid during assembly – this can change the impedance and therefore the performance of the cable.
Atlas DD (Dual Drain) System
Normally screened cables suffer from screen distortion when they are prepared for production. (If you've ever wired a plug or connector which uses a screened cable, you've done this yourself, cutting back and probably twisting the screening braid for termination). This distortion of the screen has a measurable impact, effectively changing the impedance and therefore the performance of the cable.
Twin symmetrical drain wires (each attached to 180° segments of the plug) are inserted between a 100% copper/Mylar™ foil and screen. The unique dd system connects the screen effectively to the cable return/plug interface, meaning the cable can be terminated without distorting, twisting or mechanically stressing the precision-laid screen. The benefits are in maintaining a consistent low impedance load to the plug, and a total 360° screening against noise and signal loss caused by RFI (Radio Frequency Interference).
Grun Coherent Earthing System
One of the biggest obstacles to achieving the performance levels equipment is capable of is noise. Low levels of RFI (radio frequency) and EMI (electro-magnetic interference) and noise on the signal ground all subtly modulate and degrade the overall noise levels of the system.
Ironically, this is generally only noticeable when eliminated – even though much of this ‘noise’ is theoretically at frequencies beyond the range of our hearing. The main sources are noise in the mains supply and component ground connections – mobile phones, ‘wallwart’ chargers and wifi networks are major offenders – while a percentage is actually generated within the equipment itself. Generally things have got worse with the advent of computer audio.
The Grun Coherent Earthing System addresses these issues by providing an ‘independent’ earth for users of Mavros and Asimi Ultra interconnects with the new Grun configuration.
Contact Enhancer Option
To ensure the best possible connection between your system, Future Shop recommends the DeoxIT Gold G-Series contact enhancer.
DeoxIT Gold is carefully applied to the plug contacts of your cable and is a unique conditioning solution designed to improve conductivity and provide long-lasting protection on gold, base metals and other precious metal contacts and connections. DeoxIT Gold penetrates plated surfaces, molecularly bonding to the base metals to seal and protect both surfaces.
The benefits of applying DeoxIT gold are:
- Improved Conductivity
- Maintained optimum signal quality
- Reduced wear & abrasion
- Prevents fretting/dendrite corrosion
- Forms a protective anti-tarnishing coating
- Stabilises connections between similar and dissimilar metals
- Reduces arcing, RFI and intermittent connections
Please select this option from the above ‘Contact Enhancer’ drop-down menu and our engineers will apply the contact solution to your cable connectors prior to shipping.
Specification :
- Construction : Twin multicore dual drain
- Material : OCC Copper
- Dielectric : Microporous PTFE (Teflon™)
- Screen : Braid + Mylar™, 100%
- Capacitance : 48.92 pF/m
- Inductance : 0.7256 µH/m
- Resistance : 0.0181 Ohms/m
- VOP : 0.81
- Outside Diameter : 9.8mm
- Supplied with 1x Grun Achromatic RCA Adaptor to 2 Female Connectors
About Atlas Cables 
Atlas Cables are a major producer of interconnects and cables in the United Kingdom of Great Britain. All products are researched, developed and most are assembled in the Atlas purpose built factory in Scotland.
Many of these products are unique and use advanced techniques of production or manufacture in order to bring to the user the very finest quality products. With each new model we continue to push the boundaries of reliability and performance. It's little wonder then, that Atlas Cables have had so many mile-stone advances in the past and that Atlas Cables have secured so many awards in comparative tests against other products.
About Atlas Cables
Scottish cable maker that designs and builds its own conductors, connectors and cables rather than assembling bought-in parts.
Atlas researches, designs and produces its cables in Scotland, with a handful of exceptions. Many cable brands assemble off-the-shelf components, but Atlas specifies the conductors, insulation and terminations itself and tests the result in its own listening room. It offers a five-year guarantee on its cables.
Read more about Atlas Show less
The plugs are Atlas designs too
Atlas designs its own RCA plugs. The Achromatic and Ultra RCAs are built for low mass and high bandwidth, and the newer Metik connectors were developed for personal audio. Designing the connectors in house means Atlas is not limited to what an outside supplier already sells.
Three performance levels, with named ranges in each
The catalogue is arranged in three performance levels. Upgrade covers Element and Equator, Aspire covers Hyper and Ailsa, and High End covers Mavros, Arran, Eos and Zeno. You can choose the level that suits the rest of your system, then move up later without changing brand.
Custom options and a repair service
Atlas lists luxe and speaker termination options, so you can specify a cable to suit the equipment at each end. It also repairs, customises and upgrades its cables through a dedicated service, which means you can bring an older cable up to date instead of replacing it.
Why we stock Atlas
Atlas run pure copper conductors through most of the range rather than silver or silver plating. That gives a warmer, more forgiving balance than the silver-plated cables we sell. If your system is already leaning bright, Atlas is usually where we point you first. Hand-built in Scotland, and we have sold them since 2008.
New cables (even high-quality ones) benefit from a period of signal conditioning before reaching their optimum performance. The dielectric (insulation) around the conductors needs time to stabilise under the electromagnetic field created by signal flow. Rather than leaving this to you, we run cables on our Nordost Vidar burn-in machine before dispatch, up to the equivalent of 200 hours of use, in a fraction of the time. Your cable arrives performance-ready from the first listen.
Specification :
- Construction : Twin multicore dual drain
- Material : OCC Copper
- Dielectric : Microporous PTFE (Teflon™)
- Screen : Braid + Mylar™, 100%
- Capacitance : 48.92 pF/m
- Inductance : 0.7256 µH/m
- Resistance : 0.0181 Ohms/m
- VOP : 0.81
- Outside Diameter : 9.8mm
- Supplied with 1x Grun Achromatic RCA Adaptor to 2 Female Connectors
We use Royal Mail 1st Class services for our Standard Delivery.
Orders received before 4.30 pm Monday to Friday are usually dispatched the same day by FIRST CLASS post (unless premium postal or timed courier services are selected), subject to stock availability. This does not apply to custom-length cables and speaker cables as these require a longer timescale to terminate. This also excludes all cables selected for the burn-in service. Please note, we do not process orders on national holidays in the UK. Over 98% of our orders are delivered the next working day including Saturdays.
Standard delivery is usually within 2 working days, although 98% of all orders are delivered the next working day including Saturdays. In extreme cases, such as delivery to the Highlands and Islands, this may take 3 days.
All items are fully insured and come with an invoice from Future Shop. We use the Royal Mail for delivery of small packages and DPD Local or DHL for items that weigh over 2KG. Items over 2KG are fully insured and will usually be delivered within 48 hours of placing your order subject to stock availability. For international orders, we use FedEx or DHL services where customers have selected this option.
Please note, special orders for non-standard cable lengths may be subject to longer deliver time-scales. This may vary from manufacturer to manufacturer.
We offer 'Free delivery on orders over £99' subject to the following terms & conditions:
- Applies only to orders with £99 or more of items (including VAT at the UK rate), at Future Shop
- Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK (excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL).
- Applies only to deliveries to addresses within mainland UK and Northern Ireland addresses. Applies only to orders that are to be delivered to a single Mainland UK delivery address.
- You will not be eligible for free delivery on your order if any items are cancelled or returned for a refund, bringing the total order amount below £99. Where items are returned, the refund due will be the cost of the item less any postage costs.
- We reserve the right to change or discontinue 'Free delivery on orders over £99 promotion at any time.
- FREE DELIVERY FOR ORDERS OVER £99 OFFER DOES NOT APPLY TO TRADE CUSTOMERS.
UK Postal & Delivery Charges - FIRST CLASS
Free UK delivery on all orders over £99*
| Weight | Price (FIRST CLASS UK POSTAGE) |
| 0g - 1000g | £3.95 |
| 1000g - 1400g | £4.95 |
| 1400g - 1800g | £5.95 |
| 1800g - 2000g | £6.95 |
| 2000g - 3000g | £8.95 |
* Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK.
Free Delivery for orders over £99 excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL.
Special Delivery UK - Guaranteed Next Working Day
We have 99.9% of the UK covered With Royal Mail Next Day Special Delivery. We guarantee delivery to most UK addresses by 1pm the next working day. This includes Northern Ireland, Jersey and Guernsey. Some places take longer to deliver to but we still guarantee delivery within three working days by 5.30 PM.
Please note, Royal Mail Special Delivery for next working day may not be possible where non-standard cable lengths are ordered. If this is the case, the item will be shipped via The Royal Mail Special Delivery service as soon as the cable is custom made.
For orders weighing over 2KG, we reserve the right to ship items using Next Day Pre-Noon Courier Services where Royal Mail Special Delivery option has been selected.
Channel Islands & Northern Ireland
We accept orders from all Channel Islands including Alderney, Jersey, Guernsey and Sark. Unless you select a premium service, Items weighing under 2KG are delivered using our standard UK delivery option above. For items weighing over 2KG, a surcharge may be applied for all deliveries to the Channel Islands as well as Northern Ireland.
European Countries
Deliveries to EU member states are not subject to 20% VAT after December 31st 2020 and therefore the 20% VAT on items is automatically deducted when you log-in, register or proceed to place an order.
The customer will be liable for the VAT at the local VAT rate, duty on the import and the brokerage service fee if applicable. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.
We offer the following shipping services:
- Royal Mail First Class International Airmail Services - Items are usually delivered within 3 to 5 working days
- Royal Mail Standard International Mail Services - Items are usually delivered within 7-10 working days
- DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
- Federal Express International Priority - Items are usually delivered within 24 to 48 hours. FedEx orders must be received by 3.00pm for next day service to most destinations in Europe
- Federal Express International Economy - Item are usually delivered within 48 to 72 hours
We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.
Worldwide - Excluding UK & Europe
Deliveries outside of the UK are not subject to 20% VAT and so the 20% tax on items is automatically deducted when you log-in, register or proceed to place an order.
If applicable, the customer will be liable for the taxes at the local tax rate, duty on the import and the brokerage service fee. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.
We offer the following shipping services:
- Royal Mail First Class International Airmail Services - Items are usually delivered within 7 to 10 working days
- Royal Mail Standard International Mail Services - Items are usually delivered within 15 working days
- DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
- Federal Express International Priority - Items are usually delivered within 48 hours. FedEx orders must be received by 3.00pm in order to ship items the same day, subject to stock availability
- Where the actual weight of the package significantly exceeds the shipping cost charged on orders, we may write to you for an additional shipping charge. For larger orders, items may be shipped in multiple packets at our discretion
We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.
Frequently Asked Questions
Free Premium Cable Burn-In Service: Experience the Power of Nordost VIDAR 2 Machine
We are thrilled to unveil our upgraded cable burn-in service, now featuring the cutting-edge VIDAR 2 burn-in machine. At Future Shop, we strive to provide the best possible experience for our customers, and this enhanced service is designed to unlock the true potential of your high-end cables. Read on to discover the exceptional benefits and advancements offered by the VIDAR 2 machine.
Please note: We are unable to burn-in cables with stripped bare ends or BFA plugs. Cable burn-in occurs after your order has been processed for the selected time period. For custom-length cables, burn-in takes place after termination by the manufacturer or our skilled engineers.
The Nordost VIDAR cable burn-in machine seamlessly combines three vital functions into a single operation:
- Neutralising charges around cables and insulation: The VIDAR 2 effectively dissipates any built-up charges, creating an optimal environment for signal transmission.
- Deep conditioning into the conductor core: With its wide band and profound conditioning capabilities, the machine induces significant changes in signal passage through the metal, resulting in enhanced performance.
- Ultrasonic surface conditioning of conductors: The VIDAR 2 employs ultrasonic technology to refine the conductor surface, further refining the signal quality.
In addition to all the advantages of its predecessor, the VIDAR 2 introduces remarkable improvements, including:
- Complex burn-in signal with wider bandwidth and richer content
- Enhanced directionality for cables
- FOUR burn-in zones - including a new digital zone for USB, Ethernet, and Coaxial (BNC) cables.
Using a proprietary blend of composite and complex signals, the VIDAR 2 ensures comprehensive cable conditioning. The signal consists of ultra-low and ultra-high frequencies, surpassing video frequency ranges. The signal effectively penetrates the core at ultra-low frequencies by oscillating throughout the cable while swiftly traversing the surface at ultra-high frequencies. This transmission methodology counters harmonics and heterodynes between the two complex waveforms, improving signal performance throughout all cable layers.
Furthermore, the circuitry design boasts a unique feature that drives electrons above the conductor into the dielectric or insulation area. This process neutralizes any electrical charges that may impact the signal integrity. With the Nordost VIDAR, we go beyond merely sending ping-pong signals along the cable; we also ensure a balanced signal flow from the centre core to the outer shield in interconnect cables.
What does all this mean for you?
Conditioning your cables with the Nordost VIDAR yields remarkable benefits, including enhanced sound staging, heightened detail reproduction, and a more captivating and musical presentation.
We offer our cable burn-in service as a complimentary offering at the discretion of Future Shop. While we strive to accommodate all burn-in requests for the specified time periods, please understand that during exceptionally busy periods, we may be unable to fulfill all demands due to the limited connections available on the Nordost VIDAR cable conditioning machines.
READ MORE ABOUT THE NORDOST VIDAR 2 BURN-IN TREATMENT
Atlas Mavros Grun Ultra 2 RCA to 2 RCA Audio Cable
RCA interconnect cable based on the same design objectives and manufacturing techniques developed for Atlas' Asimi range, utilising copper rather than silver conductors. The new generation Mavros now features the Grun Coherent Earthing System.
The Mavros Ultra RCA uses the very highest quality ‘6N’ (99.99997% purity) copper manufactured using the OCC ‘Ohno Continuous Cast’ technique. Cables manufactured with lower grade materials and poor manufacture typically have a coarse, grainy structure which compromises sound quality. In the manufacture of Mavros, Atlas maximise the copper’s conductivity by ensuring that there is typically one grain in approximately 125 metres of conductor, allowing the signal a continuous unbroken path –in practice, the signal has a faster, cleaner and more direct path to follow.
The cable consists of a pair of conductors, each made up from six bundles of 12 multi-conductor wires, plus a thicker centre wire. This in turn is covered by a continuous copper/Mylar™ electrostatic screen with copper shielding braid, ensuring minimal susceptibility to RF interference and noise.
Theoretically, the best dielectric (insulation layer) is air. Conventional dielectric (insulation) materials impose their own signature distortion and loss on the signal. Atlas' technique uses a microporous PTFE (Teflon™) tape, which is wound around the core conductors, then covered again and stabilised using a protective FPE (Flexible PolyEthylene) dielectric. This process maintains the required conductor geometry, and bestows greater manufacturing consistency. Termination is with Atlas' low mass, high bandwidth, cold-weld Ultra RCA or XLR connectors, both of which have minimal effect on the integrity of the signal.
Features :
- Ultra RCA Plugs
- OCC Copper Conductors
- PTFE Dielectric
- Twin Multi-Core Construction
- Dual Drain ('DD') Technology
- Grun Coherent Earthing System
- Supplied with 1x Grun Achromatic RCA Adaptor to 2 Female Connectors
Ultra RCA Plug
The Ultra is a wide-band, OCC copper, constant impedance, self-cleaning, solder-free construction RCA plug.
In Atlas' cables, the conductor to plug interfaces are solder free, and the gold-plated conjugate brackets act as the return signal path, helping to reject RFI. Both conjugate brackets (these grip the cable without the adverse effects of compressing it, which can alter impedance) have two asymmetrical leaves which spring open on insertion and wipe clean the signal path. To maintain a clean signal path, simply remove and re-insert them periodically.
The Ultra RCA connectors utilise low-mass non-magnetic connectors to minimise the negative effect of excessive metal in the plug itself.
Ohno Continuous Casting Copper (OCC Copper)
The Ohno continuous casting method re-heats the extrusion as the molten copper is forced out of the mould and very slowly and gradually draws the grain or crystal down the conductor''s length, creating a ‘single crystal structure.’ Actually, because no copper is 100% pure, there will always be a few boundaries produced by impurities. The frequency of boundaries created are quite insignificant. A typical crystal in a copper conductor drawn to 0.3 mm diam. using the OCC process is 125.00 metres long!
The benefits are obvious, with almost no crystal boundaries, the audio signal is no longer impeded down the copper wire and more information and detail is delivered faithfully to the receiving equipment.
| Copper Purity Comparison (0.3mm Diameter) | ||||
| TPC | OFC | OCC | ||
| Purity | >99.9% | >99.99% | >99.999% | |
| Specific Gravity | 8.75 | 8.926 | 8.938 | |
| Gas Impurities (ppm) | ||||
| O2 | 200~500 | <10 | <5 | |
| H2 | <0.5 | <0.5 | <0.3 | |
| Average Crystal Size (Metre) | 0.007 | 0.02 | 125.00 | |
| Crystals Per Metre | 150 | 50 | 0.008 | |
PTFE Dielectric
PVC (Poly Vinyl Chloride) is cheap to produce and, as such, is the most commonly used insulation in AV cables. However, PVC is the worst quality insulation a Hi-Fi or AV signal can encounter as its high loss causes a significant reduction in signal velocity. PVC is better suited to power cables and should be avoided in Hi-Fi and AV signal cables.
Other dielectrics in common use are Polyethylene, Polypropylene and Polytetrafluoride Epoxy (better known as PTFE (Teflon™) or Teflon,) and the new and unique Atlas (PTFE).
Microporous PTFE (Teflon™) is a unique, low density dielectric material, phase stable at room temperature, which offers significant performance improvements over solid PTFE (Teflon™) dielectric designs.
The table below shows the properties of a selection of dielectrics. Though not used as a dielectric in Atlas' cables, PVC is included for comparison purposes.
| Dielectric Material Comparison (0.3mm Diameter) | |||||
| Property | Polyvinyl Chloride (PVC) |
Foamed Polyethylene (PEF) |
Polypropylene (P.P) |
Teflon (FEP or PTFE) |
PTFE |
| Dielectric Constant (@ 50 -106Hz) |
4-8 | 2.3 | 2.25 | 2.1 | 1.3 |
| Dielectric Strength (kV mm-1) |
23-30 | 30-50 | 30-50 | 20-25 | N/A |
| Loss Tangent (% @ 50 - 106Hz) |
8-15 | 0.02-0.05 | 0.02-0.06 (@ 106Hz) |
0.02-0.07 | N/A |
| Volume Resistivity (Ohms.cm @ 20°C) |
1012-15 | >1017 | 6.5x1014 | >1016 | N/A |
| Tensile Strength (Kg mm-2) |
1.0-2.5 | 1.0-2.0 | 3.0-4.0 | 1.9-2.2 | 1.0 |
| Melting Point (°C) |
-130 | 112-120 | 155-160 | 275 | 275 |
| Max. Continuous Operating Temp. (°C) |
60 | 75 | 90 | 200 | 260 |
| Min. Operating Temp. (°C) |
-15 to -40 | <-60 | -5 to -45 | <-60 | -250 |
Twin Multi-Core Construction
A pair of identically matched conductors (one for signal path, the other acts as the return conductor) enclosed within a non-conducting screen. Combined with Atlas' DD (dual drain) system which avoids distortion of the screening braid during assembly – this can change the impedance and therefore the performance of the cable.
Atlas DD (Dual Drain) System
Normally screened cables suffer from screen distortion when they are prepared for production. (If you've ever wired a plug or connector which uses a screened cable, you've done this yourself, cutting back and probably twisting the screening braid for termination). This distortion of the screen has a measurable impact, effectively changing the impedance and therefore the performance of the cable.
Twin symmetrical drain wires (each attached to 180° segments of the plug) are inserted between a 100% copper/Mylar™ foil and screen. The unique dd system connects the screen effectively to the cable return/plug interface, meaning the cable can be terminated without distorting, twisting or mechanically stressing the precision-laid screen. The benefits are in maintaining a consistent low impedance load to the plug, and a total 360° screening against noise and signal loss caused by RFI (Radio Frequency Interference).
Grun Coherent Earthing System
One of the biggest obstacles to achieving the performance levels equipment is capable of is noise. Low levels of RFI (radio frequency) and EMI (electro-magnetic interference) and noise on the signal ground all subtly modulate and degrade the overall noise levels of the system.
Ironically, this is generally only noticeable when eliminated – even though much of this ‘noise’ is theoretically at frequencies beyond the range of our hearing. The main sources are noise in the mains supply and component ground connections – mobile phones, ‘wallwart’ chargers and wifi networks are major offenders – while a percentage is actually generated within the equipment itself. Generally things have got worse with the advent of computer audio.
The Grun Coherent Earthing System addresses these issues by providing an ‘independent’ earth for users of Mavros and Asimi Ultra interconnects with the new Grun configuration.
Contact Enhancer Option
To ensure the best possible connection between your system, Future Shop recommends the DeoxIT Gold G-Series contact enhancer.
DeoxIT Gold is carefully applied to the plug contacts of your cable and is a unique conditioning solution designed to improve conductivity and provide long-lasting protection on gold, base metals and other precious metal contacts and connections. DeoxIT Gold penetrates plated surfaces, molecularly bonding to the base metals to seal and protect both surfaces.
The benefits of applying DeoxIT gold are:
- Improved Conductivity
- Maintained optimum signal quality
- Reduced wear & abrasion
- Prevents fretting/dendrite corrosion
- Forms a protective anti-tarnishing coating
- Stabilises connections between similar and dissimilar metals
- Reduces arcing, RFI and intermittent connections
Please select this option from the above ‘Contact Enhancer’ drop-down menu and our engineers will apply the contact solution to your cable connectors prior to shipping.
Specification :
- Construction : Twin multicore dual drain
- Material : OCC Copper
- Dielectric : Microporous PTFE (Teflon™)
- Screen : Braid + Mylar™, 100%
- Capacitance : 48.92 pF/m
- Inductance : 0.7256 µH/m
- Resistance : 0.0181 Ohms/m
- VOP : 0.81
- Outside Diameter : 9.8mm
- Supplied with 1x Grun Achromatic RCA Adaptor to 2 Female Connectors
About Atlas Cables
Atlas Cables are a major producer of interconnects and cables in the United Kingdom of Great Britain. All products are researched, developed and most are assembled in the Atlas purpose built factory in Scotland.
Many of these products are unique and use advanced techniques of production or manufacture in order to bring to the user the very finest quality products. With each new model we continue to push the boundaries of reliability and performance. It's little wonder then, that Atlas Cables have had so many mile-stone advances in the past and that Atlas Cables have secured so many awards in comparative tests against other products.
About Atlas Cables
Scottish cable maker that designs and builds its own conductors, connectors and cables rather than assembling bought-in parts.
Atlas researches, designs and produces its cables in Scotland, with a handful of exceptions. Many cable brands assemble off-the-shelf components, but Atlas specifies the conductors, insulation and terminations itself and tests the result in its own listening room. It offers a five-year guarantee on its cables.
Read more about Atlas Show less
The plugs are Atlas designs too
Atlas designs its own RCA plugs. The Achromatic and Ultra RCAs are built for low mass and high bandwidth, and the newer Metik connectors were developed for personal audio. Designing the connectors in house means Atlas is not limited to what an outside supplier already sells.
Three performance levels, with named ranges in each
The catalogue is arranged in three performance levels. Upgrade covers Element and Equator, Aspire covers Hyper and Ailsa, and High End covers Mavros, Arran, Eos and Zeno. You can choose the level that suits the rest of your system, then move up later without changing brand.
Custom options and a repair service
Atlas lists luxe and speaker termination options, so you can specify a cable to suit the equipment at each end. It also repairs, customises and upgrades its cables through a dedicated service, which means you can bring an older cable up to date instead of replacing it.
Why we stock Atlas
Atlas run pure copper conductors through most of the range rather than silver or silver plating. That gives a warmer, more forgiving balance than the silver-plated cables we sell. If your system is already leaning bright, Atlas is usually where we point you first. Hand-built in Scotland, and we have sold them since 2008.
New cables (even high-quality ones) benefit from a period of signal conditioning before reaching their optimum performance. The dielectric (insulation) around the conductors needs time to stabilise under the electromagnetic field created by signal flow. Rather than leaving this to you, we run cables on our Nordost Vidar burn-in machine before dispatch, up to the equivalent of 200 hours of use, in a fraction of the time. Your cable arrives performance-ready from the first listen.
Specification :
- Construction : Twin multicore dual drain
- Material : OCC Copper
- Dielectric : Microporous PTFE (Teflon™)
- Screen : Braid + Mylar™, 100%
- Capacitance : 48.92 pF/m
- Inductance : 0.7256 µH/m
- Resistance : 0.0181 Ohms/m
- VOP : 0.81
- Outside Diameter : 9.8mm
- Supplied with 1x Grun Achromatic RCA Adaptor to 2 Female Connectors
We use Royal Mail 1st Class services for our Standard Delivery.
Orders received before 4.30 pm Monday to Friday are usually dispatched the same day by FIRST CLASS post (unless premium postal or timed courier services are selected), subject to stock availability. This does not apply to custom-length cables and speaker cables as these require a longer timescale to terminate. This also excludes all cables selected for the burn-in service. Please note, we do not process orders on national holidays in the UK. Over 98% of our orders are delivered the next working day including Saturdays.
Standard delivery is usually within 2 working days, although 98% of all orders are delivered the next working day including Saturdays. In extreme cases, such as delivery to the Highlands and Islands, this may take 3 days.
All items are fully insured and come with an invoice from Future Shop. We use the Royal Mail for delivery of small packages and DPD Local or DHL for items that weigh over 2KG. Items over 2KG are fully insured and will usually be delivered within 48 hours of placing your order subject to stock availability. For international orders, we use FedEx or DHL services where customers have selected this option.
Please note, special orders for non-standard cable lengths may be subject to longer deliver time-scales. This may vary from manufacturer to manufacturer.
We offer 'Free delivery on orders over £99' subject to the following terms & conditions:
- Applies only to orders with £99 or more of items (including VAT at the UK rate), at Future Shop
- Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK (excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL).
- Applies only to deliveries to addresses within mainland UK and Northern Ireland addresses. Applies only to orders that are to be delivered to a single Mainland UK delivery address.
- You will not be eligible for free delivery on your order if any items are cancelled or returned for a refund, bringing the total order amount below £99. Where items are returned, the refund due will be the cost of the item less any postage costs.
- We reserve the right to change or discontinue 'Free delivery on orders over £99 promotion at any time.
- FREE DELIVERY FOR ORDERS OVER £99 OFFER DOES NOT APPLY TO TRADE CUSTOMERS.
UK Postal & Delivery Charges - FIRST CLASS
Free UK delivery on all orders over £99*
| Weight | Price (FIRST CLASS UK POSTAGE) |
| 0g - 1000g | £3.95 |
| 1000g - 1400g | £4.95 |
| 1400g - 1800g | £5.95 |
| 1800g - 2000g | £6.95 |
| 2000g - 3000g | £8.95 |
* Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK.
Free Delivery for orders over £99 excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL.
Special Delivery UK - Guaranteed Next Working Day
We have 99.9% of the UK covered With Royal Mail Next Day Special Delivery. We guarantee delivery to most UK addresses by 1pm the next working day. This includes Northern Ireland, Jersey and Guernsey. Some places take longer to deliver to but we still guarantee delivery within three working days by 5.30 PM.
Please note, Royal Mail Special Delivery for next working day may not be possible where non-standard cable lengths are ordered. If this is the case, the item will be shipped via The Royal Mail Special Delivery service as soon as the cable is custom made.
For orders weighing over 2KG, we reserve the right to ship items using Next Day Pre-Noon Courier Services where Royal Mail Special Delivery option has been selected.
Channel Islands & Northern Ireland
We accept orders from all Channel Islands including Alderney, Jersey, Guernsey and Sark. Unless you select a premium service, Items weighing under 2KG are delivered using our standard UK delivery option above. For items weighing over 2KG, a surcharge may be applied for all deliveries to the Channel Islands as well as Northern Ireland.
European Countries
Deliveries to EU member states are not subject to 20% VAT after December 31st 2020 and therefore the 20% VAT on items is automatically deducted when you log-in, register or proceed to place an order.
The customer will be liable for the VAT at the local VAT rate, duty on the import and the brokerage service fee if applicable. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.
We offer the following shipping services:
- Royal Mail First Class International Airmail Services - Items are usually delivered within 3 to 5 working days
- Royal Mail Standard International Mail Services - Items are usually delivered within 7-10 working days
- DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
- Federal Express International Priority - Items are usually delivered within 24 to 48 hours. FedEx orders must be received by 3.00pm for next day service to most destinations in Europe
- Federal Express International Economy - Item are usually delivered within 48 to 72 hours
We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.
Worldwide - Excluding UK & Europe
Deliveries outside of the UK are not subject to 20% VAT and so the 20% tax on items is automatically deducted when you log-in, register or proceed to place an order.
If applicable, the customer will be liable for the taxes at the local tax rate, duty on the import and the brokerage service fee. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.
We offer the following shipping services:
- Royal Mail First Class International Airmail Services - Items are usually delivered within 7 to 10 working days
- Royal Mail Standard International Mail Services - Items are usually delivered within 15 working days
- DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
- Federal Express International Priority - Items are usually delivered within 48 hours. FedEx orders must be received by 3.00pm in order to ship items the same day, subject to stock availability
- Where the actual weight of the package significantly exceeds the shipping cost charged on orders, we may write to you for an additional shipping charge. For larger orders, items may be shipped in multiple packets at our discretion
We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.
Write Your Own Review
Atlas Mavros Grun Ultra 2 RCA to 2 RCA Audio Cable Pair
We are interested in your opinion of this product. let us and other customers know how you feel by filling in the comment field below. Your review will appear in this section within 3 working days.
Please do:
- - Write 50-300 words for the product
- - Comment on the products value and effectiveness
- - Tell us if you like the product, but most importantly explain why you like or dislike it
- - Mention related products and how this one rates by comparison
Its build is superb, and it is flexible, which is good. There is no fancy battery pack on it, but an earth wire that seems to make a difference - clearer sound.
It is a copper cable, and I compared it to AQ WInd. / Fire. It is almost identical, but I can only say I find it slightly easier to listen to than the AQ items. Not as bright as WInd, which I guess is copper, and not any hint of a silver coat, but more pleasing than Fire ... so subjective, though, and an audition is essential as Fire is great ... but more expensive!
I think the main thing I can say here is that this purchase has no downside, as I see it. It is a great cable and having spoken to the MD of the company, I do not doubt their passion and knowledge! You won't get better ...Try in your system.
I have been really impressed. I was tempted to get their dearest cable Arran, but I think that is unnecessary as this is superb. The bass is superb and just right. Not too tight, not too controlled or bloated ... just right. The detail is superb and separated. Silver will give you far more ... but you will then immediately wince and wish you had just gone with the Atlas cable that was more natural and not trying to create something unnatural!
This is a great cable to listen to and appreciate music!
No faults ... I can't find any!
(1) Lowered the noise floor dramatically. The music background became incredibly silent and ‘dark’, revealing increased detail, subtlety and nuance. Dynamics improved. Music notes leapt out of the silent background and are presented in a remarkably vivid, three-dimensional manner. The music sounded more realistic and alive.
(2) Reduced distortion. There was far less distortion and fuzziness around notes, which I had unconsciously taken for granted. It appears that my amplifier and speakers were capable of sounding a LOT better. The room now sounds like it has been acoustically treated.
(3) Improved soundstage imaging. My Rogers LS3/5a speakers ‘vanished’ to a much greater degree with the Atlas Mavros interconnects. Individual instruments and voices sprang to life in their place, with surprising realism. The soundstage expanded outwards. Music sounded less compressed and less forced.
(4) Improved frequency range. Bass notes were stronger, deeper, firmer and more tuneful. High frequencies were smoother with far more detail. Timing and ambience are greatly enhanced. My speakers now sound ‘bigger’, more solid and a lot more expensive.
I had previously auditioned several decent cables from local stores (Eg. Vermouth, Nordost & Transparent). However, none of those clearly beat the Cardas Hexlink cables (with RF-filtering cable jackets added). The Atlas Mavros Grun cables most certainly did. They are in another league altogether.
Out of interest, I tried the Atlas Mavros interconnect cables with the earthing ‘Grun’ lead unplugged (from the amp), and they still sounded extremely good. However, they sounded even better with the Grun wire plugged into the amp (in a spare RCA input). The Grun earthing lead definitely helps, although it is clearly not the only reason the cables sound as good as they do.
In recent years, I've auditioned several different amplifiers (Accuphase, Jadis, Norma), and speakers (Harbeth, Spendor, Audio Solutions) but despite being vastly more expensive, none offered any substantial improvement. So, I kept my old equipment, humble as it is. Changing over to Atlas cables has provided a much greater improvement, at a fraction of the cost. Now I'm discovering just how good my audio system can actually sound.
Very highly recommended.
Frequently Asked Questions
Free Premium Cable Burn-In Service: Experience the Power of Nordost VIDAR 2 Machine
We are thrilled to unveil our upgraded cable burn-in service, now featuring the cutting-edge VIDAR 2 burn-in machine. At Future Shop, we strive to provide the best possible experience for our customers, and this enhanced service is designed to unlock the true potential of your high-end cables. Read on to discover the exceptional benefits and advancements offered by the VIDAR 2 machine.
Please note: We are unable to burn-in cables with stripped bare ends or BFA plugs. Cable burn-in occurs after your order has been processed for the selected time period. For custom-length cables, burn-in takes place after termination by the manufacturer or our skilled engineers.
The Nordost VIDAR cable burn-in machine seamlessly combines three vital functions into a single operation:
- Neutralising charges around cables and insulation: The VIDAR 2 effectively dissipates any built-up charges, creating an optimal environment for signal transmission.
- Deep conditioning into the conductor core: With its wide band and profound conditioning capabilities, the machine induces significant changes in signal passage through the metal, resulting in enhanced performance.
- Ultrasonic surface conditioning of conductors: The VIDAR 2 employs ultrasonic technology to refine the conductor surface, further refining the signal quality.
In addition to all the advantages of its predecessor, the VIDAR 2 introduces remarkable improvements, including:
- Complex burn-in signal with wider bandwidth and richer content
- Enhanced directionality for cables
- FOUR burn-in zones - including a new digital zone for USB, Ethernet, and Coaxial (BNC) cables.
Using a proprietary blend of composite and complex signals, the VIDAR 2 ensures comprehensive cable conditioning. The signal consists of ultra-low and ultra-high frequencies, surpassing video frequency ranges. The signal effectively penetrates the core at ultra-low frequencies by oscillating throughout the cable while swiftly traversing the surface at ultra-high frequencies. This transmission methodology counters harmonics and heterodynes between the two complex waveforms, improving signal performance throughout all cable layers.
Furthermore, the circuitry design boasts a unique feature that drives electrons above the conductor into the dielectric or insulation area. This process neutralizes any electrical charges that may impact the signal integrity. With the Nordost VIDAR, we go beyond merely sending ping-pong signals along the cable; we also ensure a balanced signal flow from the centre core to the outer shield in interconnect cables.
What does all this mean for you?
Conditioning your cables with the Nordost VIDAR yields remarkable benefits, including enhanced sound staging, heightened detail reproduction, and a more captivating and musical presentation.
We offer our cable burn-in service as a complimentary offering at the discretion of Future Shop. While we strive to accommodate all burn-in requests for the specified time periods, please understand that during exceptionally busy periods, we may be unable to fulfill all demands due to the limited connections available on the Nordost VIDAR cable conditioning machines.
READ MORE ABOUT THE NORDOST VIDAR 2 BURN-IN TREATMENT
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Write Your Own Review
Atlas Mavros Grun Ultra 2 RCA to 2 RCA Audio Cable Pair
We are interested in your opinion of this product. let us and other customers know how you feel by filling in the comment field below. Your review will appear in this section within 3 working days.
Please do:
- - Write 50-300 words for the product
- - Comment on the products value and effectiveness
- - Tell us if you like the product, but most importantly explain why you like or dislike it
- - Mention related products and how this one rates by comparison
