Supra Lorad 1.5 IEC Fr 4m

The Lorad 1.5 IEC Fr is a mains power cable designed by Swedish manufacturer Supra Cables. It uses tinned OFC copper conductors and a semi-conductive carbon/nylon shield. Its 3 x 1.5 mm² cross-section is designed to limit electromagnetic interference transmitted to audio and video equipment. The design is based on LoRad (Low Radiation) technology, developed by Supra Cables after several years of research.

LoRad technology: minimizing electromagnetic radiation

The acronym LoRad stands for “Low Radiation”. Supra devoted more than five years of research and development to the original shielded LoRad cable, since improved. Many years of R&D and over €100,000 of investment were required to design this first CE-approved audiophile power cable.

LoRad protects against alternating fields emitted by the cable, but also against the pickup of ambient airborne noise fields, such as cordless and mobile phones, Wi‑Fi, and radio and TV broadcasts.

• The cable uses two complementary mechanisms to attenuate interference:
  • The outer shield protects against the electric field
  • The wires are twisted with a short pitch, counteracting the alternating magnetic field which, according to the physical law of inductance, always surrounds a wire carrying current

A construction designed for flexibility and durability

The secret of LoRad lies in the yellow/green earth conductor. Standard shielded cables have 4 conductors: blue, brown, yellow/green and an uninsulated wire in contact with the shield. Until now, it had not been possible to pass the safety test for flexible use with this bare drain wire, as it cuts and damages the inside of the cable when it is repeatedly moved and bent.

As usual, Supra did something unexpected. The yellow/green earth conductor has been insulated with a semi-conductive plastic. No drain wire is needed anymore and the cable passed the flexibility test. The cable is electrically shielded because the foil is in contact with the semi-conductive plastic on the earth conductor.

The semi-conductive carbon/nylon shield offers improved properties: better flex resistance, environmental immunity, higher tensile strength and fewer microphonic effects.

The robustness of the cable has been validated by rigorous testing: the highly flexible outer jacket easily passed the CE regulatory bending test of 2 x 30,000 flexes.

Physical characteristics and connectors

The Lorad 1.5 stands out with its characteristic glacier blue color, which has become emblematic of the range. The 1.5 mm² OFC (Oxygen Free Copper) conductors are tinned to improve resistance to oxidation and longevity. The outer diameter is 8 mm.

LoRad MkII is tested and certified by Intertek Sweden, meeting European safety regulation HD21.5 S3. Supra LoRad is the only audio‑grade mains cable in the world with full European safety approval.

Applications beyond home theater

Supra power cables are of such quality that they are also used in military, medical and space applications, where electromagnetic radiation must be eliminated.

Selected customers include the Swedish National Laboratory of Forensic Science (SKL), the Swedish Air Force (JAS project), hospitals and a majority of European air traffic control towers.

The cable is particularly suitable for

• Hi‑fi systems and home theater installations
• Professional recording studios
• Medical and laboratory equipment
• Environments sensitive to interference
• People with electro‑hypersensitivity (EHS)

Installation and safety instructions

To benefit fully from the LoRad effect, the cable must be connected to a properly earthed wall outlet. The use of unsafe grounding points (water pipes, for example) is strictly prohibited and dangerous.

The cable is designed to replace the standard detachable power cords (IEC plug) supplied with most audio and video devices: amplifiers, CD players, Blu‑ray players, projectors, televisions, computers or subwoofers.

Technical specifications

Electrical and mechanical specifications

• Rated voltage / current: 250 V / 10 A
• Conductor cross-section: 3 x 1.5 mm² (AWG 15)
• Available lengths: 1 m, 1.5 m, 2 m, 4 m
  • Other lengths available on request
• Outer sheath: flexible, durable PVC
• Color: glacier blue
  • Other colors available on request

Advanced technologies and materials

• LoRad technology (low radiation)
  • Reduced electromagnetic fields for cleaner power supply
• Tinned OFC copper conductors
  • Optimal current transmission
  • Long service life
• Carbon / nylon semi-conductive shielding
  • Superior protection against RF interference
• Short-pitch twisting
  • Neutralizes magnetic fields to prevent disturbances

Connectors and finish

• 24 K gold-plated connectors
  • Excellent conductivity
  • Oxidation resistance
• Straight Schuko plug (SW-EU) to IEC C13 (SWF-10)
• Shielding with carbon / nylon semi-conductive tape

Safety and installation

• Always plug into a properly grounded wall outlet
• The use of unsafe grounding is strictly prohibited and dangerous
  • Example: water pipes

Recommended applications

• High-quality hi-fi and home cinema systems
• Recording studios and sensitive installations
• Medical devices and laboratories
• Critical environments
  • Air traffic control centers
  • Forensic laboratories