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QED Signature Audio 40

QED Signature Audio 40

Signature Audio 40 is an entirely new design concept from QED laboratories. The cordage is designed primarily for low capacitance as this has been identified by QED as a significant factor leading to a high fidelity experience and makes for a tight sound retai ... more

EAN: 5036694037348

Man. Part No.: Signature Audio 40

QED Signature Audio 40

QED Signature Audio 40

Signature Audio 40 is an entirely new design concept from QED laboratories. The cordage is designed primarily for low capacitance as this has been identified by QED as a significant factor leading to a high fidelity experience and makes for a tight sound retaining the rhythm of the original piece. Add our Complementary Conductor Technology for high frequency detail and our Analoc Technology to maximise signal integrity and the result is what we feel to be the most innovative interconnect ever made by QED. Please see our 'cables matter' section below for more in-depth information on this ground breaking design.

There’s no denying QED’s leading role in the British cable market over the past 40 years – a whole nation of audiophiles grew up with QED 79-strand speaker cable in the eighties, likely between a NAD amp and a pair of KEF Codas! To commemorate its anniversary, it has a new range of interconnects. Between you and me dear reader, word is that they were developed after HFC’s epic 12-way interconnect Group Test that ran in issue 362 back in 2012; QED took a good listen to the winners and came back with this.


The Signature 40 is a beautifully packaged product, and immaculately turned out with its translucent sheathing showing the braided electromagnetic shielding around it. QED’s beautiful Rhodium-plated Analoc plugs look like jewellery, and are said to provide a high-purity copper connection without the use of bulky brass plug bodies.


They’re soldered to silver-plated 99.999% oxygen-free copper conductors in a Teflon dielectric, in an asymmetric twisted pair configuration and a Zn/ Mn ferrite jacket is used. Finally the whole cable is cryogenically treated.




Here’s a genuinely impressive sounding audio interconnect. Although not completely translucent, the new Signature is open and detailed like few others at the price, with a light, spry sort of sound that captures the energy of the music in its full glory. Tonally, it’s very close to neutral, but comes across as just a little ‘well lit’ in absolute terms, pepping up otherwise lacklustre recordings or systems by a fraction.



This innovation utilises two conductors of different diameters to carry the same audio signal. This has the effect of providing an alternative path for high frequency audio components which might otherwise become time smeared in a single audio pathway.


This material with its low dielectric constant has been used to cut down on the amount of audio signal energy lost due to cable capacitance.


It is understood that cryogenic treatment results in the elimination of dislocations and fractures in the material’s micro-structure. Trumpets and other brass instruments have been found to produce a better tone after Deep Cryogenic Treatment (below −190 °C, −310 °F) and it also extends their working life. Our extensive listening tests have shown that the cryogenically treated cable is preferred over the same cable without the treatment.


It has strong and taut bass,happily lacking in overhang or smear, and a crisp and incisive midband that lets the elements in the mix hang in their respective positions in space with ease. It doesn’t crowd out things, offering a nice spacious soundstage where there’s room for the music to breathe. Treble is sweet and airy, too. Overall then, this new cable is an excellent performer at the price, right across the board.


The new QED Analoc™ plug is a low eddy current design featuring small high purity copper

conductors in place of the usual large volume brass body found in ordinary high quality plugs. This cuts down or eliminates the tendency for the changing magnetic field in the conductor to induce eddy currents which can affect the micro timing of the audio signal. Rhodium plating has the advantage for use as a plating material due to its superior hardness.



- Silver Plated 99.999% Oxygen Free Copper(SPOFC) conductors with Teflon™ dielectric
Asymmetrical twisted pair geometry

- SPOFC shield giving 100% electromagnetic screening

- Zn/Mn ferrite Jacket

- Rhodium plated QED ‘Analoc™’ RCA plugs
Cryogenically Treated

- Capacitance: 63pF/m

- Inductance: 0.37uH/m

- Loop resistance: 0.072 Ω/m

- Dissipation Factor: 0.0011

- QED Lifetime Guarantee

Additional Information

Promotion No
Manufacturer's Part No. Signature Audio 40
EAN 5036694037348
Length N/A
Amplifier Award No
Connections Analog
Audio Interconnect Analogue
Profile No
Video Features No
Features No
Bi Wire No

Finance options* to help you afford the product you want!

If your order value is £389.00 or over you will be given the option to buy on finance when you reach the checkout. We have two finance options available:

Buy Now Pay 6 Months Later
Buy Now Pay 12 Months Later


Please Note: A minimum 10% deposit is payable up front on credit or debit card on all finance orders.

How to Apply

Applying for finance is simple. All you need to do is call us on 0800 634 4484 during opening hours and we will be able to process your order.

Who is the finance agreement with?

The finance agreement is with Hitachi Consumer Credit, one of the largest money lenders in the UK.

*Finance is available to UK applicants 18 years of age or older and subject to status. Finance is not available for business customers. Prices are correct at time of going to press and are subject to change during the term of this offer without notice. Terms and conditions are available on request. Finance agreements are available on orders between  £389 and £10,000 (including VAT and shipping). Please ensure you are able to keep up repayments of any finance package taken.

Now Group UK Ltd trading as Exceptional AV operates under a Consumer Credit Licence, No. 560813.
This licence is issued by The Director General of Fair Trading at the Office of Fair Trading in accordance with the Consumer Credit Act 1974.

QED Signature Audio 40

Availability: Usually dispatched

Availability: In stock

£189.00 inc vat


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Returns are easy and flexible. We will accept returned goods up to 90 days from purchase with the following restrictions as summarised below. For more details please read our Terms & Conditions of Sale, a link is shown at the bottom of the home page.

Changing your Mind
It's OK to change your mind but please be aware that all goods must be returned in as new, unused and re-saleable condition. This means that all packaging must be intact, all accessories are complete in their original wrappers and any free items are also returned with the goods. Essentially the product must be returned in the same condition as you would expect to receive a new unit in. In all cases the cost of returning the goods will be the customer's responsibility. All faulty items must be returned complete and will be repaired under the manufacturer's warranty.


How we Handle Returns
Depending on how long you have had the goods there are different options availble to you. In the case of faulty items, if the item fails due to a manufacturing fault between 1 and 28 days from delivery we will exchange it for a brand new one of the same model. Any items which are found faulty after 28 days from delivery will be repaired under the manufacturers warranty. For returns where you have changed your mind, please find our policy below:


This is were you return your item and we will exchange it for another item of equal or higher value. If the item you wish to change to is of higher value you only pay the difference. If the item is of a lower value we will issue you with a credit note for the difference which you can spend with us at a later date.

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This is where you return your item and we issue you with a credit note which you can use against another purchase with us.

This is where you return your item and we issue a refund back to the same method you paid with. e.g. the same credit card. This is not available after 14 days, only exchange or credit note is available after 14 days.

25% Restocking Fee
If your item is returned to us between 29 and 90 days from delivery we will charge a restocking fee of 25% of the price you paid for the item initially. This will be deducted from the value of the exchange or credit note which is issued to you. This is because  technology in the AV marketplace moves fast, and as a result the value of items decrease very quickly.

Please note we do not accept returns after 90 days, except for repairs under warranty.

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