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QED Reference Optical Quartz
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QED Reference Optical Quartz

Reference Optical Quartz is the first of its kind, consisting of 210 separate boro-silicate glass fibres. The cable allows you to experience stunning sound when connecting DAC's, TV’s, CD players and Blu-Ray players to amplifiers or receivers. Reference Optical Qu ... more
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EAN: 5036694037249

Man. Part No.: REFERENCE OPTICAL QUARTZ

QED Reference Optical Quartz

QED Reference Optical Quartz


QED'S SUPERIOR TOSLINK OPTICAL DIGITAL AUDIO INTERCONNECT CABLE MADE WITH REAL GLASS

Reference Optical Quartz is the first of its kind, consisting of 210 separate boro-silicate glass fibres. The cable allows you to experience stunning sound when connecting DAC's, TV’s, CD players and Blu-Ray players to amplifiers or receivers because it has a much higher bandwidth and only 1/10th of the attenuation of traditional acrylic fibres. Reference Optical Quartz vastly exceeds the demands for high definition multi-channel digital audio with a bandwidth of over 150MHz which is totally unaffected by bending the cable.


GLASSCORE TECHNOLOGY

QED's new Glasscore™ technology employs multiple fibre bundles of ultra-fine boro-silicate glass optical fibres (GOF) of no more than 50um each to make up the 1mm diameter necessary to conform to the Toslink standard connectors. Because the fibres are so small the different paths taken by the light rays are similar in length virtually eliminating the timing error and introducing less distortion and jitter. This has the effect of increasing bandwidth and the accuracy of the data transmission.


STEPPED REFRACTIVE INDEX

The quartz fibres are coated with a cladding of low Refractive Index to guide the light signal.


OVER 150MHZ BANDWIDTH

This vastly exceeds the demands for high definition multi-channel HD digital audio. In contrast to conventional acrylic glass optical cables quartz glass cables can deliver signals up to and including 24/192 with very low jitter .

Reference Optical Quartz can provide a much higher bandwidth than a single acrylic glass fibre with 1/10th of the attenuation.


ULTRA LOW JITTER / ULTRA LOW LOSS

QED have calculated that jitter (or distortions caused by timing differences between the different light paths in conventional optical cables) could typically reach up to 145ps. In Reference Optical Quartz, timing errors are virtually eliminated, introducing less distortion, jitter and ultra low loss < 0.03 dB/m.

 

CABLES MATTER

Digital Optical Audio cables are now used widely to connect audio source equipment such as TV’s, CD players and Blu-Ray players to amplifiers or receivers. There are many advantages to using the optical output from your source equipment. The optical output provides complete electrical isolation between equipment eliminating ground loops and noise induced by large external voltages or currents. With fast digital signalling using twisted pair copper cables, problems such as near end crosstalk can cause distortion of the signal; these problems are eliminated by using the digital optical connection option.


Because of the very short distances and relatively slow data signalling speeds of the Toslink system it is possible to use very inexpensive plastic optical fibres (POF) made of an acrylic glass material known as PMMA (Polymethyl-methacrylate). These are usually 1mm in diameter to fit the Toslink connector and of course their extra width only exacerbates the time smearing or jitter caused by the multi-modes within the fibre. Calculations have shown that a typical 1m cable with a PMMA fibre of refractive index 1.5 and a critical angle of 76 degrees has the potential to introduce jitter of up to 145ps into the SPDIF signal. These plastic optical fibres (POF) account for virtually all commercially available Digital Optical Audio cables available today.

The alternative to this situation adopted by QED in our new Glasscore™ technology cable is to employ multiple fibre bundles of ultra-fine boro-silicate glass optical fibres (GOF) of no more than 50um each (thinner than a human hair see below) to make up the 1mm diameter necessary to conform to the Toslink standard connectors. In the new QED Reference Optical Quartz cable there are 210 such fibres each of which guide the light along a much tighter path making the different modes much more uniform than in the larger diameter single fibres.

Because the range of angles of incidence at which the light is accepted at the aperture of the cable is smaller and the critical angle of internal reflection in the glass is larger than in POF fibres the range of different paths taken by the light is reduced. In this way short data pulses are no longer artificially elongated or smeared by the physical process of travelling along the cable.


GLASSCORE

Each fibre is thinner than a human hair. 210 fibres of 50um each are required to make up the 1mm diameter necessary to conform to the Toslink standard connectors.

 

PMMA OPTICAL FIBRES

A typical optical fibre is made of an acrylic glass material known as PMMA (Polymethyl-methacrylate). This acrylic core allows the light to take many different length paths through it. Timing differences are introduced – accounting for typically up to 145ps of Jitter.

Signal losses also occur when light is incident above the Critical Angle and is not reflected back (Yellow).

 

REFERENCE OPTICAL QUARTZ

Reference Optical Quartz has in excess of 210 Glasscore™ fibres each thinner than a human hair. This ensures ultra low jitter because the smaller numerical aperture reduces the range of angles of acceptance leading to straighter signal paths.

 


SPECIFICATIONS

- Unique boro-silicate glass construction

- Highly flexible 210 x 50 micron optical fibre bundle
>150MHz Bandwidth

- Ultra low jitter

- Stepped refractive index

- Ultra low loss < 0.03 dB/m

- QED Lifetime Guarantee

Additional Information

Promotion No
Manufacturer's Part No. REFERENCE OPTICAL QUARTZ
EAN 5036694037249
Length N/A
Amplifier Award No
Connections No
Audio Interconnect Digital
Profile Normal
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 Reference Optical Quartz

Availability: Usually dispatched

Availability: In stock

£79.00 inc vat

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Up to 90 Day Returns!

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:

Returns

Exchange
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.

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

Refund
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.

To complete your order please call us on 0800 634 4484
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