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The PowerBlock with UK SuperSockets

5 out of 5

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We're sorry, but as of March 2020 this product has been discontinued. The good news is, we’ve updated, upgraded and have a new version called the Signature PowerBlock . Click here for to buy and more information

The PowerBlock is our no-compromise Hi-Fi and Home Cinema extension. It has eight sockets... in our opinion offers real improvements in sound and picture quality... will last a lifetime... and is a real talking point.

The standard PowerBlock features our well-regarded, high-performance SuperSockets. SuperSockets™ are the best performing standard sockets we have found, specially treated with DeoxIT™ contact enhancer to maintain their performance and keep them free of oxidation (we use a special jig to get at the internal contacts).

SuperSockets™ offer a good tight fit around plug pins for effecient contact and reduced impedance.


You can choose the type of wiring your block's sockets are connected internally with. As standard, the block is wired with Kimber’s TCX cable. TCX is a heavy gauge copper cable, of the same quality as the individual wires woven together in our PowerKords™ but capable of handling higher currents.

Choose copper/silver and four of the block's eight sockets are wired with Kimber's pure silver cabling for lower impedance and better bass performance. The other four sockets are wired with Kimber's TCX cabling.

Choose Silver and all eight sockets on the block (and the 16A outlet at the end of the block) are wired with silver.

Spike protection

PowerBlocks™ are fitted with our MegaClamp™ spike protection. We believe that spike activity on the mains supply can degrade the sound quality from your equipment (they can raise the background noise level in amplification circuits); remove them and in our opinion the sound is cleaner and clearer.

Our MegaClamp™ components were developed for use in the communications industry; we’ve found that they are the most effective way of absorbing spikes affecting your Hi-Fi or Home Cinema.

Additional grounding

Each block is fitted with grounding terminal, to allow you to add an additional ground to your Hi-Fi system.

Grounding the metal casework on your system, by running an earth cable to an earth terminal such as fitted to the PowerBlock can bring real sonic benefits. Use in addition with an RF Router for even better results

Connecting to the mains supply

PowerBlocks™ are fitted with a 16A IEC socket which allows you to choose the grade and length of cable you need to connect it to the wall socket. We recommend you opt for either the PowerKord-300™ or PowerKord-500™ for this application.

When choosing your mains cable, make sure you select the version with the 16A (HC) IEC connector. Click here to view PowerKords™.

Adding an extra block

PowerBlocks™ have a second 16A IEC outlet, effectively a 9th outlet at the other end of the case to allow you to daisy chain a second block to extend the number of sockets or to attach a mains filter. Contact us if you need a cable to do this.

Money Back Guarantee
Don't forget! We are so confident in the performance of this product that it is covered by our 60 Day Home Trial with Money Back Guarantee. Buy the product and if you're not completely satisfied, you can return it within 2 months for a refund. For full details click here.


  • Made from impact and fire resistant UL-90-V0 ABS

  • Eight high quality, inverted sockets

  • Internally wired with KIMBER KABLE

  • Earth terminal for attachment to RF Router

  • Internal MegaClamp™ for equipment protection from lightning and high voltage mains spikes

  • High current 16A IEC input socket to connect your choice of PowerKord™

  • L:327mm H:133mm W:135mm

  • And for your peace of mind...

    PowerBlocks are made in UL-90-V0 ABS (a type of thermoplastic) which has been chosen specially for its sonic qualities (we’ve found that plastic extensions sound much better than metal extensions); durability; and the ability to resist shocks and high impacts. Additionally, the material is fire resistant and can be recycled.

    Customer Reviews
    Overall product rating 5 / 5
    5 / 5

    reviewed by M. Floyd
    17 May 2018
    Yes, I recommend this product.
    "Great Product Backed By A Brilliant Warranty"
    I purchased my Ultra Purifierblock back in 2003 and for 15 years it served me faithfully until it recently developed a fault. I contacted Russ Andrews to enquire about a repair and they couldn't have been more helpful. I returned it and had a replacement unit in my hands within a week (and that included a bank holiday weekend!). Their products might be at the more premium end of the market but rest assured that the 25 year warranty is not just there for window dressing. Buy with confidence.
    5 / 5

    reviewed by Cameron
    17 May 2017
    Yes, I recommend this product.
    "Great Upgrade"
    I bought one of these to upgrade a silver plated audiophile mains block by another manufacturer, which was itself a worthwhile upgrade. The powerblock is in another league though with greater and more realistic dynamics, soundstaging, clarity and detail all being revealed but importantly a tremendous sense of enhanced musicality. There are some tremendous timing nuances (eg drum rolls or bass lines) that just make the music sound so much more real. I have a number of Russ Andrews products in my system now, and this musicality is what keeps me coming back: its all about the enjoyment of music after all and these products really enhance the experience. This is not hi fi - it is music - can't give a product (or range of products) a higher recommendation than that.