Quantum Science Audio (QSA) Yellow Entry Level UK Mains Fuse - 3A, 5A & 13 Amp
Connection Guide
UK 3 Pin Mains
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Item code: QSA Yellow UK
Inc. VAT (20%) · Ex. VAT: £166.67 Ex. VAT · Inc. VAT (20%):
Lowest price in the last 30 days:
Request to Price Match
If you've seen a better offer for this product, we will endeavour to match it. The competing offer must be on brand-new boxed items, and in stock from another UK Online Authorised Retailer (excluding marketplaces). Price match quotations are valid for 7 days.
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 12pm (Mon–Fri) for same-day dispatch
Quantum Science Audio (QSA) Yellow Entry Level UK Mains Fuse
Future Shop is very excited to introduce Quantum Science Audio, the undisputed heavyweights in the audiophile fuse space. With more than 22 years of research into what they call 'Bottle Neck Distortion', QSA products can remarkably enhance your enjoyment of your system for such a small component, until recently considered irrelevant by many in the industry. Since all current that enters a power cable or component in your system must pass through the fuse before it proceeds, the fuse's quality or lack thereof can drastically affect your system's performance. QSA fuses aim to reduce the negative effects of what QSA describe as 'bottlenecking', which can help your system perform to its full potential.
Much of this may sound outrageous, but only to those who have not heard it for themselves. Having conducted our own listening tests and based on external feedback, we are convinced that these fuses- all the way through the range- offer an upgrade to a system that can match components many times the price.
The YELLOW fuse is intended to offer a more refined audio performance. It incorporates further advancements in material treatment over the QSA Light-Blue fuse, aiming to provide clearer and more detailed audio reproduction for systems requiring a delicate balance of quality and value.
The next one up in the range is the VIOLET Mid-Level fuse. Positioned in the mid-range category, the VIOLET fuse includes comprehensive Quantum level treatments. It is aimed at audiophiles who are seeking noticeable improvements in sound depth and fidelity over entry-level options.
Each fuse in the QSA lineup is unique, catering to different preferences and audio systems. Ranging from entry-level to high-fidelity enhancements, these fuses are developed with the goal of enhancing the listening experience. However, the impact of these fuses on audio quality can be subjective and may vary based on individual systems and preferences. Users are encouraged to personally evaluate their performance.
|
"I can tell you this: many high-end audio tweaks I've heard sound great, but none have matched the QSA's remarkable performance. I repeat, none." (Read More...) Product Review - Clement Perry, Stereotimes - Most Wanted Components 2020, 2021 & Publisher's Choice 2021, 2022
|
Please note: fuses are directional, so please ensure you install your fuse accordingly. If you are unsure of the correct direction, simply try it both ways. You should hear a difference.
About Quantum Science Audio (QSA)
Quantum Science Audio (QSA) is a company that focuses on designing and manufacturing high-end audio equipment and accessories. QSA is committed to incorporating advanced technologies and scientific principles into its audio products. It aims to push the boundaries of audio reproduction by applying concepts from quantum physics and other scientific disciplines. QSA believe that by harnessing the power of quantum science, they can create audio systems that deliver exceptional performance and fidelity. The company's product lineup typically includes a range of audio accessories. These products are designed with attention to detail and often feature innovative engineering techniques and materials.QSA's focus on incorporating quantum science into their audio solutions sets them apart from more traditional audio manufacturers. They aim to provide audiophiles and music enthusiasts with a unique listening experience beyond conventional audio reproduction.
QSA specialises in manufacturing QSA home audio fuses. QSA Home Audio Fuses are designed to enhance your audio setup by potentially reducing the noise floor in your system. The range consists of 9 different fuses, each offering a unique level of performance enhancement. The entry-level black fuse serves as a starting point, while the gold fuse, positioned at the top end of the range, is claimed to deliver notable improvements to the noise floor. The listening experience is subjective, and individuals are encouraged to audition the fuses themselves to assess the impact on their audio system. QSA fuses aim to minimise bottle-neck distortions, potentially resulting in a quieter background that allows the music to emerge with improved dynamics and liveliness.
QSA products incorporate Quantum Science Audio's proprietary technologies, including Musical Metal Molecule Alignment Technology (MMMAT) and Metal Active Technology (MAT). These technologies aim to promote efficient electron flow and enhanced conductivity within the products.
It is important to note that individual experiences and results may vary when using audio fuses, and personal preferences play a significant role in evaluating their impact on audio systems.
QSA takes pride in its team of audiophile engineers who strive to design top-of-the-line audio products. The company aims to deliver natural sounds, rhythms, and music that resonate with listeners deeply and emotionally. With their groundbreaking science and technology, QSA accessories offer a new generation of audio enhancement, allowing users to experience greater detail and clarity in their audio playback. Quantum Science Audio products are designed to provide audiophiles with a transformative audio experience, uncovering new depths and nuances in their favourite music.
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) |
|---|---|
| 0000g – 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.
For the Next Day Special Delivery service, orders must be received by Future Shop by 4.30pm weekdays. Orders after the 4.30pm deadline cannot be guaranteed for same day dispatch.
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
Enhance Your Experience: Free Cable Burn-In Service with Nordost VIDAR Machine
Please take note of the following details regarding our cable burn-in service:
- Cable Compatibility: We regret to inform you that we cannot burn-in cables with stripped bare ends or BFA plugs. In order for cables to undergo the burn-in process, they should be terminated or have connectors.
- Timing: Cables will be burnt in for the selected period after processing your order. For custom-length cables, the burn-in process will occur after they have been terminated by the manufacturer or our engineers unless specified otherwise in the product description.
- Availability: Future Shop provides our cable burn-in service free of charge, but its availability is at our discretion. While we strive to fulfil all burn-in requests for the specified time periods, please understand that during exceptionally busy periods, we may be unable to meet the demand due to limited connections on the Nordost Vidar cable conditioning machines.
The Nordost VIDAR cable burn-in machine integrates three key functions into one operation:
- Charge Neutralisation: It eliminates charges that accumulate around the cables and their insulation, ensuring a more balanced electrical environment.
- Deep Conditioning: The machine provides a wide band and deep conditioning process that affects the conductor core, resulting in changes to the signal transmission through the metal. This deep conditioning enhances the cable's performance.
- Ultrasonic Surface Conditioning: The VIDAR machine utilizes ultrasonic waves to condition the surface of the conductors, optimizing their contact and overall conductivity.
The VIDAR employs a proprietary combination of composite and complex signals to condition the cables. These signals comprise ultra-low and ultra-high frequencies, extending beyond the range of video frequencies. The signal moves back and forth along the cable, penetrating deep into the core with ultra-low frequencies and traversing the surface with ultra-high frequencies. This transmission method generates beat harmonics between the two complex waveforms, which permeate all layers of the cable. The circuitry of the VIDAR also drives electrons from the conductor into the insulation area, neutralizing electrical charges.
So, what does this all mean for you?
The ultimate outcome of conditioning cables with the Nordost VIDAR is improved sound staging, increased detail, and an overall more musical presentation in your audio system.
Now, you may wonder why cable burn-in is necessary. During cable manufacturing, gasses become trapped as insulation is applied over the conductors. Additionally, new cables often possess high electrical charges, resulting in a brittle and bright sound that lacks the desired detail and depth for music production.
When cables undergo burn-in, the trapped gasses are dissipated, and small impurities in the conductor metals begin to exhibit diode-like behaviour, favouring current flow in a specific direction.
Here are the physical effects of the burn-in process:
- Charge Neutralisation: The burn-in process neutralizes charges in the conductors and insulation, promoting a more balanced electrical environment.
- Wide Bandwidth Frequencies: The conditioning affects how signals pass through the metal, enabling a wider range of frequencies to penetrate all cable layers.
- Signal Transmission: The burn-in process establishes the directionality of the cable, optimizing signal transmission from one end to the other.
When cables are properly burnt in, you can expect the following audible changes in your audio system:
- Fuller and Natural Sound: Your system should be capable of producing a more immersive and realistic performance with a fuller and more natural sound.
- Increased Detail: You may notice enhanced details and nuances in the music, allowing you to perceive subtle elements that were previously hidden.
- Improved Soundstage: The dimensionality of your system's soundstage can be greatly improved, creating a more spacious and immersive listening experience.
At Future Shop, our goal is to maximise your satisfaction. That's why we offer a free burn-in service on all our cables before they arrive at your door, enabling you to sit back and enjoy the benefits of properly conditioned cables in your audio system.
READ MORE ABOUT THE NORDOST VIDAR CABLE TREATMENT
Quantum Science Audio (QSA) Yellow Entry Level UK Mains Fuse
Future Shop is very excited to introduce Quantum Science Audio, the undisputed heavyweights in the audiophile fuse space. With more than 22 years of research into what they call 'Bottle Neck Distortion', QSA products can remarkably enhance your enjoyment of your system for such a small component, until recently considered irrelevant by many in the industry. Since all current that enters a power cable or component in your system must pass through the fuse before it proceeds, the fuse's quality or lack thereof can drastically affect your system's performance. QSA fuses aim to reduce the negative effects of what QSA describe as 'bottlenecking', which can help your system perform to its full potential.
Much of this may sound outrageous, but only to those who have not heard it for themselves. Having conducted our own listening tests and based on external feedback, we are convinced that these fuses- all the way through the range- offer an upgrade to a system that can match components many times the price.
The YELLOW fuse is intended to offer a more refined audio performance. It incorporates further advancements in material treatment over the QSA Light-Blue fuse, aiming to provide clearer and more detailed audio reproduction for systems requiring a delicate balance of quality and value.
The next one up in the range is the VIOLET Mid-Level fuse. Positioned in the mid-range category, the VIOLET fuse includes comprehensive Quantum level treatments. It is aimed at audiophiles who are seeking noticeable improvements in sound depth and fidelity over entry-level options.
Each fuse in the QSA lineup is unique, catering to different preferences and audio systems. Ranging from entry-level to high-fidelity enhancements, these fuses are developed with the goal of enhancing the listening experience. However, the impact of these fuses on audio quality can be subjective and may vary based on individual systems and preferences. Users are encouraged to personally evaluate their performance.
|
"I can tell you this: many high-end audio tweaks I've heard sound great, but none have matched the QSA's remarkable performance. I repeat, none." (Read More...) Product Review - Clement Perry, Stereotimes - Most Wanted Components 2020, 2021 & Publisher's Choice 2021, 2022
|
Please note: fuses are directional, so please ensure you install your fuse accordingly. If you are unsure of the correct direction, simply try it both ways. You should hear a difference.
About Quantum Science Audio (QSA)
Quantum Science Audio (QSA) is a company that focuses on designing and manufacturing high-end audio equipment and accessories. QSA is committed to incorporating advanced technologies and scientific principles into its audio products. It aims to push the boundaries of audio reproduction by applying concepts from quantum physics and other scientific disciplines. QSA believe that by harnessing the power of quantum science, they can create audio systems that deliver exceptional performance and fidelity. The company's product lineup typically includes a range of audio accessories. These products are designed with attention to detail and often feature innovative engineering techniques and materials.QSA's focus on incorporating quantum science into their audio solutions sets them apart from more traditional audio manufacturers. They aim to provide audiophiles and music enthusiasts with a unique listening experience beyond conventional audio reproduction.
QSA specialises in manufacturing QSA home audio fuses. QSA Home Audio Fuses are designed to enhance your audio setup by potentially reducing the noise floor in your system. The range consists of 9 different fuses, each offering a unique level of performance enhancement. The entry-level black fuse serves as a starting point, while the gold fuse, positioned at the top end of the range, is claimed to deliver notable improvements to the noise floor. The listening experience is subjective, and individuals are encouraged to audition the fuses themselves to assess the impact on their audio system. QSA fuses aim to minimise bottle-neck distortions, potentially resulting in a quieter background that allows the music to emerge with improved dynamics and liveliness.
QSA products incorporate Quantum Science Audio's proprietary technologies, including Musical Metal Molecule Alignment Technology (MMMAT) and Metal Active Technology (MAT). These technologies aim to promote efficient electron flow and enhanced conductivity within the products.
It is important to note that individual experiences and results may vary when using audio fuses, and personal preferences play a significant role in evaluating their impact on audio systems.
QSA takes pride in its team of audiophile engineers who strive to design top-of-the-line audio products. The company aims to deliver natural sounds, rhythms, and music that resonate with listeners deeply and emotionally. With their groundbreaking science and technology, QSA accessories offer a new generation of audio enhancement, allowing users to experience greater detail and clarity in their audio playback. Quantum Science Audio products are designed to provide audiophiles with a transformative audio experience, uncovering new depths and nuances in their favourite music.
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) |
|---|---|
| 0000g – 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.
For the Next Day Special Delivery service, orders must be received by Future Shop by 4.30pm weekdays. Orders after the 4.30pm deadline cannot be guaranteed for same day dispatch.
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
Quantum Science Audio (QSA) Yellow Entry Level UK Mains Fuse - 3A, 5A & 13 Amp
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
Customers overwhelmingly praise the QSA Yellow fuse for delivering significant sonic improvements across multiple parameters—enhanced clarity, detail, soundstage width, dynamics, and natural tonal balance. Common benefits cited include reduced digital glare, improved stereo imaging, tighter bass, and more articulate instrumentation with minimal harshness. Users consistently emphasize the importance of extended burn-in periods, ranging from 96 hours to 300 hours, noting sound quality continues evolving throughout this process. Several reviewers highlight fuse directionality as critical for optimal performance. At £200, customers frame the upgrade as comparable to much more expensive component upgrades, with many purchasing multiple units across their systems. Futureshop's customer service, particularly staff advice from Mark and Geoff, receives frequent commendation. The fuse reportedly benefits audio and video systems alike. Two reviewers noted the fuse produces system-dependent results—one found it boosted bass at some midrange expense—and one earlier skeptic found it merely competent rather than transformative. No significant build quality or durability complaints were identified.
It works too well, and yet it still makes you wonder why it's so expensive to make, but the improvements you get more than justify the cost. So another yellow and blue were bought, and luckily the wife will never know, as, unlike an amp or speakers, they are hidden from sight when they are delivered, fitted with cables.
Won't work when bought on their own, as the wife will ask what you changed on the Hifi
In short, wow! What a huge leap after running in the fuse became open, detailed and natural. What astonished me the most was how utterly neutral and analogue it sounds; the voices have a faultless quality. There is also so much more treble energy, as if a veil had been obscuring the sound; despite this, there is not a hint of brightness or harshness.
Dynamics are astonishing, with such a low noise floor, the tiniest details have become much clearer. I'm noticing details I've never heard before. For the price, the yellow fuse is an absolute bargain, 10 out of 10.
My system comprises the Creek 100cd and Stack Audio CS1 anti-vibration feet for the Creek CD. This is fed as a transport to the Chord Mojo 2 DAC, to Audeze LCD2 planar magnetic headphones, and to an Arcam a38 amp and Creek loudspeakers. Most of my listening is done on headphones again.
Thank you to Futureshop for the advice and excellent service.
Now I have to save up for my next yellow fuse. Yes, they are that good
This was to replace the Rega power cord connected to my Rega Aethos amplifier. Both represented a significant upgrade over the Rega cable, with improvements noted by other reviewers. As others have stated, you need to be patient with the further burn-in and the sound will vary throughout the process.
Highly recommended, I shall be trying more on my power leads to my Isotek Aquarius power conditioner.
Top service from Futureshop as always.
I called Mark just for some recommendations. I felt my system wasn't engaging enough, and the sound could be clearer. He recommended the Yellow Entry Fuse at £200. I thought it sounded a lot, but he said that is the minimum I should go for.
I read the reviews and did some research, and ordered one about 3 weeks later, opting for 24 burn-in. My initial thoughts. The vocals are more natural, and the instruments are more obvious. Slight clearer sound.
It wasn't a huge improvement, but it was definitely immediate.
Now I have only had it for a short while, and other reviewers said it takes some time to get fully burnt in, so I'm excited to see it improve further over the following weeks.
Based on the positive experience with QSA and Future Shop. I will be buying further 'Tweaks' in the coming weeks.
Some folk are also commenting on the comparison of Synergistic's Purple fuse.... NO NO NO the QSA is on another level in my humble opinion.
My system is pretty revealing, including German Physiks speakers/Edge amplification/Ayre C5xeMP sacd player/Acoustic Signature TT and Shunyata/Gutwire and Cardas cabling. I am now trying to persuade my Mrs that we need a Violet or even possibly an Orange(but with no juice)fuse to replace another Synergistic fuse, this time a Pink one.
Needless to say, I will be buying more very soon for my other components/systems.
The ‘proof of the pudding’, I am buying more.
An audiophile friend visited me for a listening session, and one standout CD that demonstrates the benefits of the yellow fuse is Goodbye (2019 remaster) by Ulrich Schnauss. This extremely multilayered album now sounds even more distinctive, and instrumentation separation is more apparent.
I think the fuse does need time to burn in, possibly 100hrs or more.
Personally, I prefer the sound of the Yellow fuse to that of my previous Synergistic Research Orange fuse.
I also had this fuse burn in for 96 hours, and, wow, I've been told it needs 200 hours to burn in properly.
Give one a try and move it between components to gauge where it improves the most—it does vary, but I guarantee you will want more.
There is no warming or changing the sound, no shift in highs, mids, or lows, but instead a significant increase in precision, detail, and clarity of sounds.
Amazing. Now, I'm putting another back in the power amp, too.
They make the sound more “natural”, and there is a palpable increase in clarity. As mentioned, I started off with one to assess its benefit, and the effectiveness does vary with different components, so it is worth auditioning across your system.
In summary, I would recommend trying one and auditioning the benefits in different parts of your system and I am sure you will want to buy more fuses.
I also have one Violet, which is even better, but having already invested heavily in power upgrades, the Yellow is a cost sweet spot for me.
Fundamentally, detail, coherence, timbre, and listening pleasure improve. They do need time to bed in and continue to improve.
This yellow fuse, without a doubt (to my ears), improves the soundstage, naturalness, and dynamics. How dramatic the effect is varies with different components. For example, there is a marked improvement with my sources and reasonable improvement with my headphone amp, but a lesser improvement with my power amps, probably because they already have excellent power regulation.
Absolutely worth auditioning because the improvement on the right component is excellent value.
I was massively sceptical about power upgrades but thought it was worth a dabble to see if there would be any incremental gains, so starting with power cables, I found surprising gains. Then fuses came into the frame with even greater scepticism, and I dabbled with cheaper fuses from another company, which justified my scepticism by making my ears clench.
Following some excellent input from Mark at Futureshop, I was persuaded to try this QSA Yellow with 96 hrs burn-in. My ears have certainly been unclenched, and I have been surprised by the improvement.
Most of my plugs are Furutech, so it’s a faff to change fuses around, but I have one plug with a fuse cassette that powers a streamer, and this yellow fuse has removed any hint of digital glare. Plus, the sound is natural and engaging, with increased clarity and soundstage without changing the character of my system. So, I’m convinced that other fuses are on order, and I’m looking forward to auditioning for analogue components in particular.
I recommend trying this fuse, particularly if you’re generally happy with your system because there are real gains to be had.
This feeds my Blue & Black QSA fuses in my system, making the sound and picture exceptionally good.
I used this fuse for my Wireworld Matrix 2 strip and was blown over by how much more quality it gave me.
Even more clarity in the bass, and improved my C1OLED TV picture quality. But the sound on my hifi is so much sharper and clearer. This fuse is unbelievably good.
I've possibly not yet fully broken in the QSA Yellow (nor even the QSA Light Blue), but I can confirm that it sounds better already. The QSA Light Blue was previously in one of the £25 MRCU ready-wired mains cables used for my Acoustic Invader preamplifier. It sounded better there than with my Gustard R26 DAC. Incidentally, I've found the two fuses to work better for me in the "wrong" direction in my MRCU mains plugs.
At first, I simply tried the QSA Yelow alone for my preamp. Next, I simultaneously tried both the QSA Yellow (for my preamp) and the QSA Light Blue (for my DAC) and vice versa. Surprisingly, both combinations sounded worse than with the QSA Yeelow alone. Hence, I have subsequently moved the QSA Light Blue to the mains cable for the integrated amp (an Audiolab 6000A) I use in my second near-field system. It gives a noticeable improvement there, too -- so I haven't wasted my money on it.
I've no real idea why a (singular) QSA fuse makes a difference, but my ears tell me it does. If you're anything like me, you too may have noticed that your (untreated) system sounds 100% at its best *only occasionally* (mood? weather?). Most of the time, it sounds at only around 70-80%.
When I used a QSA Light Blue, it not only improved the sound to around 130% but, in my opinion -- more importantly -- did so *reliably and consistently*.
As for the QSA Yellow, I'd put the improvement (so far) on the same subjective scale at around 150%. I probably won't be spending three times as much as the QSA Yellow on the QSA Violet (£620) -- diminishing returns seem quite possible, and in any case, I'm more than satisfied with what I've got.
What are the perceived sound improvements through the Decware ZF15M open baffle clones used in my primary system?
. Better and more holographic soundstage
. Better dynamics
. More easily discernible instrumental/vocal threads
. Better tonality/timbre
. Increased subtlety and refinement
. Noticeably greater emotional engagement. I've been playing tracks that I'd tended to skip more often. The QSA fuses seem to have breathed new life into them.
I'd summarise by saying that the return on investment for both fuses far exceeds what I've obtained from other system tweaks I've introduced in the past. If, as I am, you are the cautious type, you might consider dipping your toes into the weird and wonderful world of fuses with the £86 QLB as I did -- maybe even with the £50 QSA Black. One could easily spend as much on equipment supports for a smaller effect. I've found I don't have to strain to hear the improvements -- they're obvious from the start and get better as the fuse beds in.
I loaded my most recent into my high-end mains block, which has my Martin Logan Oddessy plugged into it - wow!! Great separation and detail.
My TV has also improved with improved colour and tones.
Thank you, Geoff, thank you, Future Shop!!
I am 242 hours into burn-in of 300 hours. Thanks to Geoff I knew to expect the ebbs of flows of the burn-in process. Both audio and video have improved considerably as I approach the burn-in summit. The picture is sharper and brighter, and the audio is a delight with a wider soundstage and much greater reality.
A great investment which was enhanced by Future Shop’s Geoff!
Thank you yet again Future Shop!
Probably equivalent to a major component upgrade at half the cost.
It feeds an extension block through 24 cores into a valve amplifier, and the uplift after the 96-hour burn-in is quite astounding. It is as clear as a bell, with more definition to every instrument, stronger tuneful bass lines and more powerful drumming.
It sounds faster and better with better rhythm and timing. It makes listening to your music even more pleasurable, and I still have a spare fuse to throw in the mix elsewhere.
An essential upgrade.
Happily, it did, and it’s quite obvious the people who say fuses don’t/can’t work have never heard the QSA yellow. Deeper soundstage and better stereo imagery made everything more life-like and natural.
I advise anyone sceptical about fuses to listen to one from QSA and hear for yourself.
It's a great product, thoroughly recommended.
When I gifted it a black fuse, it only accentuated this evident omission. Feeling red-faced and sheepish, I tuned in to the newfound spaciousness that had been "unearthed" in the music I held dear. But a lingering thought persisted - it warranted a yellow fuse... So, without too much self-talk, I took the plunge.
Once I swapped the black for yellow, it was clear that it was no mistake. The separation was nothing short of glorious, and crucially, it didn't overstretch the soundstage. It was akin to space within space.
For those who may question the wisdom of investing £800 in four fuses, let me assure you that it's a decision that I consider worth every penny. The transformation these little yellow fuses have wrought upon my audio setup is nothing short of astonishing. It's as if I've unveiled hidden layers of my favourite music, exposing nuances I never knew existed. If your setup has a preamp, don't ignore it. Go on, spoil it rotten!
Essentially, it's not just a sonic upgrade but a standing ovation-worthy performance.
After a lengthy phone discussion with the rather brilliant (and knowledgeable) Mark from the Future Shop team, he advised starting off with it on my power amp, which I did.
It's difficult to describe the sound, but here goes: the sound almost instantly changed to appear more "real", more present and less like a recording. Everything is more defined and more articulate in its presentation.
With my mind fairly blown away, I then started swapping the fuse around between my remaining three components - the streamer, DAC and preamp - and found that the next "best" improvement was on the streamer (I have an Ever Solo DMP A6), which opened up the soundstage in the most glorious way. So much so that a week later, I was on the phone again with Mark, ordering my second yellow fuse for said streamer.
As I said, I have no idea why and certainly not how a fuse can have such a profound effect on my system. I just know that it has.
Is £200 a lot for a fuse? Well, yes and no. If you haven't experienced its effect, then (possibly) yes, it could appear absurd. If you have experienced the difference, though, as I have, then I would strongly argue that it's a "small" price to pay.
There was an instant improvement in all aspects of the sound, even though I already had SR Purple fuses feeding my streamer, DAC and Amp. This shows that maybe getting the right fuse at the head of the chain is the place to start.
It also significantly improved the performance of my AV equipment. It’s like I’ve upgraded my OLED tv. If you can afford it…buy it!
Frequently Asked Questions
Enhance Your Experience: Free Cable Burn-In Service with Nordost VIDAR Machine
Please take note of the following details regarding our cable burn-in service:
- Cable Compatibility: We regret to inform you that we cannot burn-in cables with stripped bare ends or BFA plugs. In order for cables to undergo the burn-in process, they should be terminated or have connectors.
- Timing: Cables will be burnt in for the selected period after processing your order. For custom-length cables, the burn-in process will occur after they have been terminated by the manufacturer or our engineers unless specified otherwise in the product description.
- Availability: Future Shop provides our cable burn-in service free of charge, but its availability is at our discretion. While we strive to fulfil all burn-in requests for the specified time periods, please understand that during exceptionally busy periods, we may be unable to meet the demand due to limited connections on the Nordost Vidar cable conditioning machines.
The Nordost VIDAR cable burn-in machine integrates three key functions into one operation:
- Charge Neutralisation: It eliminates charges that accumulate around the cables and their insulation, ensuring a more balanced electrical environment.
- Deep Conditioning: The machine provides a wide band and deep conditioning process that affects the conductor core, resulting in changes to the signal transmission through the metal. This deep conditioning enhances the cable's performance.
- Ultrasonic Surface Conditioning: The VIDAR machine utilizes ultrasonic waves to condition the surface of the conductors, optimizing their contact and overall conductivity.
The VIDAR employs a proprietary combination of composite and complex signals to condition the cables. These signals comprise ultra-low and ultra-high frequencies, extending beyond the range of video frequencies. The signal moves back and forth along the cable, penetrating deep into the core with ultra-low frequencies and traversing the surface with ultra-high frequencies. This transmission method generates beat harmonics between the two complex waveforms, which permeate all layers of the cable. The circuitry of the VIDAR also drives electrons from the conductor into the insulation area, neutralizing electrical charges.
So, what does this all mean for you?
The ultimate outcome of conditioning cables with the Nordost VIDAR is improved sound staging, increased detail, and an overall more musical presentation in your audio system.
Now, you may wonder why cable burn-in is necessary. During cable manufacturing, gasses become trapped as insulation is applied over the conductors. Additionally, new cables often possess high electrical charges, resulting in a brittle and bright sound that lacks the desired detail and depth for music production.
When cables undergo burn-in, the trapped gasses are dissipated, and small impurities in the conductor metals begin to exhibit diode-like behaviour, favouring current flow in a specific direction.
Here are the physical effects of the burn-in process:
- Charge Neutralisation: The burn-in process neutralizes charges in the conductors and insulation, promoting a more balanced electrical environment.
- Wide Bandwidth Frequencies: The conditioning affects how signals pass through the metal, enabling a wider range of frequencies to penetrate all cable layers.
- Signal Transmission: The burn-in process establishes the directionality of the cable, optimizing signal transmission from one end to the other.
When cables are properly burnt in, you can expect the following audible changes in your audio system:
- Fuller and Natural Sound: Your system should be capable of producing a more immersive and realistic performance with a fuller and more natural sound.
- Increased Detail: You may notice enhanced details and nuances in the music, allowing you to perceive subtle elements that were previously hidden.
- Improved Soundstage: The dimensionality of your system's soundstage can be greatly improved, creating a more spacious and immersive listening experience.
At Future Shop, our goal is to maximise your satisfaction. That's why we offer a free burn-in service on all our cables before they arrive at your door, enabling you to sit back and enjoy the benefits of properly conditioned cables in your audio system.
READ MORE ABOUT THE NORDOST VIDAR CABLE TREATMENT
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Quantum Science Audio (QSA) Yellow Entry Level UK Mains Fuse - 3A, 5A & 13 Amp
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