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QED Reference 40 Digital audio coaxial cable


Reference Digital Audio 40 innovative S/PDIF coaxial cable with improved sound quality and shielding.

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• Innovative standard for digital coaxial S/PDIF signals.
• Silver plated conductors and QED Digiloc2™ RCA connectors minimize loss and improve signal micro-timing.
• Triple layer of electromagnetic shielding ensures minimal jitter and improved sound quality.
• 75 Ohm impedance-matched Digiloc2TM RCA connectors offer lower jitter and improved noise rejection.

Reference Digital Audio 40:

Sets a new standard in digital coaxial S/PDIF signals with its advanced technology and carefully crafted design. Using silver-plated conductors, effective high-quality shielding, and impedance-matched cables and connectors, the Reference Digital Audio 40 creates noticeable sonic improvements compared to competing products. The innovative use of QED Digiloc2™ RCA connectors reduces the return loss by up to 1.5dB compared to traditional RCA connectors, which ensures optimal signal transfer and improved micro-timing of the audio signal. With triple layers of electromagnetic shielding and a 75 Ohm coaxial design, the Reference Digital Audio 40 guarantees a low jitter signal transfer and exceptional sound quality that meets the expectations of the most demanding listeners.


• Silver-plated 99.999% oxygen-free copper as central conductor.
• Extruded foamed Polyethylene (PE) dielectric - for sonic purity and low return loss.
• Double 99.999% OFC braid plus Al/Mylar wrap for 100% electromagnetic shielding coverage.
• Twin leaf 24c gold plated QED Digiloc2™ RCA connectors with high purity copper contacts, pin and low eddy current design.
• 75 ohm coaxial design with close-matching locking connectors for reduced return loss.
QED Reference 40 Digital audio coaxial cable | 0,6 meter QE-RF3210: QED Reference 40 Digital audio coaxial cable | 0,6 meter
105,88 EUR 
QED Reference 40 Digital audio coaxial cable | 1 meter QE-RF3212: QED Reference 40 Digital audio coaxial cable | 1 meter
132,72 EUR 
QED Reference 40 Digital audio coaxial cable | 3 meter QE-RF3214: QED Reference 40 Digital audio coaxial cable | 3 meter
194,46 EUR 

Brand description - QED

QEDQED is a British specialist in audio cables that has been designing and developing superior AV cables for nearly five decades. Since the launch of their groundbreaking QED 79-strand cable in 1976, which was the world's first "specialist" speaker cable, QED has been a pioneer in cable technology. This product clearly demonstrated how cables can have a noticeable impact on sound quality. Since then, the company has utilized extensive scientific research and computer-aided design to ensure that their products remain cutting-edge.

This rich heritage and constant pursuit of innovation are at the heart of QED's latest products. All cables deliver superior performance, without compromising their competitive price points. QED offers a wide range of high-quality products, from entry-level to high-end cables.

Manuals and user guides for QED products

Unfortunately, as manufacturers do not make manuals or guides in all languages, we cannot guarantee that a local language manual is included for the item.
- If you are unsure about a manual available in the desired language, just contact us and we will do what we can to help.

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