Sbooster Ultra MKII Upgrade for the BOTW MKII Linear Power Supply

Item code: Ultra MKII Upgrade

4.8 6 reviews ✓ Verified
The Sbooster Ultra MKII is designed as an additional upgrade for our BOTW P&P ECO MKI and MKII power supplies. The Sbooster Ultra MKII has to be connected directly to the Sbooster split-current module of the BOTW P&P ECO.
£90.00
£75.00
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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.

£75.00 ex. VAT
Available — built to order, dispatches in 24 hours
Delivery: Royal Mail Tracked 24  ·  DPD Next Day from £8.95  ·  DPD Saturday from £12.95
Order before 4pm (Mon–Fri) for same-day dispatch
Our promise: 30-day returns · Free burn-in · Built in our UK workshop · 24 Months warranty · Expert support on every order

Sbooster Ultra MKII Upgrade for the BOTW MKII Linear Power Supply

 

The Sbooster Ultra MKII is designed as an additional upgrade for our BOTW P&P ECO MKI and MKII power supplies. The Sbooster Ultra MKII has to be connected directly to the Sbooster split-current module of the BOTW P&P ECO.

The Sbooster Ultra is designed for audio equipment that is sensitive to residual noise, such as digital to analog converters, music streamers, USB to SPDIF converters, headphone-, pre- and phono amplifiers. A must have for every audiophile!

The Sbooster Ultra is based on active filter technique. The electronics of the Sbooster Ultra need power to operate. Therefore the BOTW P&P ECO power supply has to be set to a higher DC-output Voltage.

Features:

  • The innovative electronic design filters and optimizes the input power and is fine-tuned within the audible reach.
  • The Ultra MKII circuit uses upgraded input and output buffers with a higher capacity and solid conductive polymer capacitors to lower the output ripple and to expand the bandwidth of the filter circuit.
  • The transient response has improved 40-50% compared to the Ultra MKI by adding new parts and lowering the output impedance to a bare minimum. The output circuit is now equipped with an impedance correction filter to achieve improved performance over a wider bandwidth.
  • “Sbooster Decoy”
  • Star-ground design
  • New designed input and output cables

 

"Sbooster Decoy"

We all love to have our audio devices in the metal enclosures, but… also a lot of noise comes from the radiation of the used electronic components, which cannot escape from the metal enclosure and keeps on bouncing within the enclosure. How can you eliminate this noise? Via Sbooster's innovative “electronic baiting container”! The “Sbooster Decoy” is integrated on the Ultra MKII to lure this unwanted noise out of the metal cage of the audio device.

Star-Ground Design

The Ultra MKII is a star-ground design. Almost every component has its own dedicated ground connection. This makes the electronic design more stable and brings ease in the music.

New Designed Input and Output Cables

The cables on the Ultra MKII have only one purpose: to pass on all the benefits of the BOTW P&P ECO and Ultra MKII design without any form of interference to the audio device. The input and output cables have high quality oxygen-free copper for the conductors and are double shielded. The interchangeable DC-connectors are equipped with custom-made gold-plated connector pins.

 

About Sbooster

Sbooster is an award-winning company founded by Wiebren Draaijer and Karin Hoks. With a passion for optimising audio and video equipment, Sbooster has gained global recognition for its intelligently designed products. Since its establishment in 2010, Sbooster has been receiving excellent reviews worldwide. What started as a small team in the Netherlands has now expanded to a larger workforce in their Sbooster factory located in Bulgaria. This growth allows them to deliver high-end quality products at a fair price. As more and more enthusiasts realise the significance of power in silence, Sbooster remains committed to silently upgrading the music experience.

Sbooster offers a range of cutting-edge products that enhance audio and video systems:

  • Sbooster Power Supply: Sbooster BOTW power supplies are engineered to provide clean and sufficient power to your devices, optimising their performance. They are offered at different voltage options, and customers have successfully used them on equipment such as the Chord Electronics Qutest DAC.
  • AC Upgrade Power Supplies: Upgrade your standard external power supply with Sbooster's "Best of Two Worlds Power & Precision ECO" (BOTW P&P ECO) power supplies for improved sound and vision.
  • Sbooster Ultra MKII: Sbooster Ultras offer advanced filtering and are available as an optional upgrade for select models, taking the performance to the next level.
  • Tweaks: Sbooster's tweaks further refine your audio and video setup, allowing you to achieve the best possible results.

Why choose Sbooster? Many audio and video enthusiasts focus on various system elements, such as screens, speakers, cables, and amplifiers, but often overlook the importance of the power supply. The power supply heavily influences sound and vision quality, and a device can only perform at its best when provided with sufficient and clean power. Insufficient power can result in distorted sound, a flat stereo image, and an overall compromised performance. Sbooster offers a solution to this common issue with their upgrade products.

You can significantly enhance their performance by replacing or upgrading the standard external power supply of your audio and video devices with Sbooster's BOTW P&P ECO power supplies. The result is a noticeable improvement in sound and vision quality, allowing you to immerse yourself in your favourite music and videos. Choose Sbooster at Future Shop to unlock the true potential of your audio and video equipment. Elevate your listening and viewing experience with their innovative power supply solutions.

 

About SBooster

Dutch maker of linear power supply upgrades for audio equipment that runs on 5 to 24V.

SBooster is a Dutch company that makes linear power supplies to replace the standard plug-in adaptor on audio equipment. Its supplies are built for devices that run on 5 to 24V, and are offered in a series of voltage versions. You can match one to a streamer, a DAC or a network switch.

Read more about SBoosterShow less

The BOTW P&P ECO MKII is the main model

BOTW stands for Best of Two Worlds, and P&P for Power and Precision. SBooster says the MKII has a better circuit board and improved magnetic shielding. Supplies are offered at 5-6, 9-10, 12-13, 15-16, 18-19 and 24V, so choose the one that matches your equipment.

The Ultra adds active filtering

The Ultra is an add-on that uses active filtering. SBooster says its supplies give more output current than the standard version and use less energy, with a two-stage mains filter and a custom transformer. These are the maker's claims, so check the specification.

Match the voltage before you buy

A linear supply must match the voltage your equipment needs, and the plug type. Using the wrong voltage can damage a device. Check the voltage and current rating printed on your existing power adaptor, then match it to the SBooster version.

Shop all SBooster →

Specification

  • Output Voltage & Current: 24V - 1.1A
  • Mains Voltage: 240V 50/60Hz as standard (Alternatives available upon request)
  • Transformer: 50VA audio grade toroidal with electrostatic and magnetic shielding
  • Mains filter: High-performance dual stage mains filter with earth line choke
  • Rectifier bridge: Power Schottky barrier rectifiers
  • Bulk capacitors: 5 x Nichicon 4700µF + 1 x 5600µF + 1 Rubycon 330µF Low Impedance High Ripple Current Capacitors
  • Regulator: High-current ultra-fast transient response LDO with an external high precision shunt reference circuit
  • Filter capacitors: Non-inductive polypropylene film capacitors
  • DC power cord: 95cm 16 AWG spiral shielded, additional shielding and quality sleeving, integrated Sbooster Split-current system and interchangeable gold plated DC-plug-connector
  • UK mains cable supplied
  • Size and Weight: 240*130*75mm 1.85Kg
  • Safety approvals: CE/GS/CCC/KC/CTUVUS/FCC/PSB IEC60065 standard
  • Warranty: 24 Months

Package Includes

  • 1x BOTW P&P ECO Linear Power Supply
  • 1x DC tip 0.7 x 2.5 x 9.5mm
  • 1x DC tip 1.3 x 3.5 x 9.5mm
  • 1x DC tip 1.7 x 4.0 x 9.5mm
  • 1x DC tip 1.7 x 4.8 x 9.5mm
  • 1x DC tip 2.1 x 5.5 x 9.5mm
  • 1x DC tip 2.5 x 5.5 x 9.5mm
  • 1x Manual
  • 1x UK Mains cable

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)
0g - 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.

 

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

Sbooster Ultra MKII Upgrade for the BOTW MKII Linear Power Supply

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:

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4.8
6 reviews
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5 (83%)
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1 (17%)
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Allan ✓ Verified Purchase
Worth it. 6 July 2026
Added 6 weeks after the main Sbooster BOTW unit began powering my Weiss 204 DAC mk 2. In my system, which is quite revealing, it made a considerable positive difference to an already impressive upgrade: more dimensionality, better-controlled and textured bass, and an extra layer of overall clarity. For £90.00 it’s great value.

Better to let your main Sbooster burn in first if you want to appreciate the difference the Ultra makes. The more your rig is sorted, the more apparent the benefits.
Andy Stallwood ✓ Verified Purchase
I was surprised 9 March 2026
As a reasonably priced upgrade to my DC power supply I did not have high expectations. Despite this, I was surprised to hear some noticeable improvements.

There is a tightness to the bass that was not noticeable beforehand. This was most satisfying.
Alan R ✓ Verified Purchase
Excellent upgrade, very good value for money 18 February 2026
Having used the "Sbooster BOTW MKII Linear Power Supply - 5-6V Rating" with my Chord Qutest DAC for a couple of years, which gave a substantial improvement to the sound, I thought I'd try the "Sbooster Ultra MKII Upgrade" to see what further improvements were possible.

After an initial running-in period of 100 hours, real benefits were noticeable: tighter bass, clearer midrange, and more detailed treble. This sound improved a bit further over the next few weeks (SBooster say to allow 4 weeks) with a bit more detail & smoothness becoming evident.

For the price, it's a very good value for money & I think I'm now getting the most out of my Chord Qutest DAC in terms of smooth power supply.
Raf ✓ Verified Purchase
Worth £99 2 June 2023
Worth £99. In my system added a little extra bit of detail I haven’t heard previously, a little deeper bass with good control and overall a touch of refinement. Not night and day difference but a nice bonus.

Use it with 12V Lumin u2 mini feeding my Pontus II 12th and UR Unico 90.

My system easily shows the changes in cabling, PSU etc., if yours does too, then most likely, you will keep it.
Scott A ✓ Verified Purchase
Nice upgrade to my Sbooster 24 November 2022
I bought this for my 5v Sbooster MKII to use with a Chord Qutest Dac. It made a nice improvement in clarity and detail and a nice improvement in the low-end transients. Bass notes are quicker with more texture and tone. It also improved the imaging.

It does all the things it claims to do on their website, and I am happy with my purchase. Good Customer Service.
MikeM ✓ Verified Purchase
There's just "more" in the music 26 April 2022
Purchased this with the Sbooster power supply (5V) for use with a Chord Qutest. Highly recommended upgrade.

Frequently Asked Questions

Sbooster power supplies provide clean, stable current to your audio and video devices. By eliminating electrical noise and voltage fluctuations, they improve dynamics, reduce distortion, and create a more natural, engaging performance.
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Sbooster power supplies work with a wide range of equipment including DACs, streamers, phono stages, headphone amplifiers, routers, and even network switches. Popular matches include Chord Electronics’ Qutest DAC and Naim streamers.
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Yes. Many enthusiasts report immediate improvements such as tighter bass, clearer midrange, more open treble, and a wider soundstage. The result is a system that sounds more natural, immersive and emotionally engaging.
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Each BOTW P&P ECO is available in different voltage options. To select the correct model, check your device’s voltage and current requirements. Future Shop’s expert team can guide you to the ideal match for your system.
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The BOTW P&P ECO already includes advanced internal filtering, designed to deliver exceptionally clean power on its own. Many users find the best results when connecting it directly to a high-quality wall socket, avoiding extra layers of conditioning that could restrict dynamics. However, if you’re using a premium mains distribution block optimised for hi-fi systems, pairing it with the Sbooster can still provide excellent performance. The key is to ensure the Sbooster always has access to a stable mains supply with minimal interference.
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Turntables and phono stages are among the most sensitive components in a hi-fi system. Any noise in their power supply chain can easily be amplified, clouding the sound. By replacing the standard adapter with a BOTW P&P ECO, you supply these devices with ultra-clean, stable power. The result is lower background noise, smoother high frequencies, tighter bass, and more natural musical flow. Vinyl playback especially benefits from this upgrade, as the Sbooster allows the subtle details and warmth of analogue recordings to shine through.
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Write Your Own Review

Sbooster Ultra MKII Upgrade for the BOTW MKII Linear Power Supply

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

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