New In
Read the Review

Upgrade your purchase with these options:

What's this?
Add to Wishlist
Delivery is charged at cost.
Email a friend
  • Superb value, high-performance audio-grade mains extension

  • Features Russ Andrews UltraSockets™ treated with DCT and DeoxIT®

  • Internally wired with Kimber Kable® TCX™ cable

  • Incorporates Russ Andrews Silencer™ mains filter and SuperClamp™ for mains noise reduction

Why X Blocks™?

Designed and built by us, X-Block™ mains extensions use our superb UltraSockets™, are wired throughout with Kimber Kable® and are fitted with our Silencer™ mains filter and SuperClamp™ surge protection.

Bettered only by our Signature PowerBlock™, X-Blocks are our best value mains extensions and can be used in a vast range of systems; from a small CD/amp, to a high-end system comprising up to eight separate components.

X Blocks are hand built to exacting standards by our highly-skilled manufacturing team and are guaranteed* to provide a lifetime of listening enjoyment.

X Block features

  • 2, 4, 6 or 8 UltraSockets™. X Blocks are fitted with our superb, high-performance power sockets to ensure the very best connection. UltraSockets have a very high build quality and, for good measure, every UltraSocket is Deep Cryogenically Treated and treated with DeoxIT® contact enhancer.

  • Kimber internal wiring. We only use Kimber’s high purity TCX™ copper cable for wiring X Blocks. This ensures full performance is maintained throughout the block with minimum impedance – each socket is optimised so there’s no restriction on where high-power components can be plugged in.

  • Bespoke ABS anti-shatter casework. We use ABS because of its combination of strength, rigidity and acoustic neutrality. It also keeps the pound-to-pleasure ratio high too!

  • Silencer™ filtration. Each X Block is fitted with our highly-rated Silencer mains filter to reduce mains noise interference. It works passively, meaning that it has none of the drawbacks of many other mains filters – drawbacks such as loss of musicality and reduced dynamic range. It’s wide-band too, effective at filtering over a wide frequency range. For the techies amongst you, it is a 'passive differential and common mode inductorless non-resonant harmonic filter'!

  • SuperClamp™ spike and surge protection. SuperClamps not only offer protection for your system, they also bring sonic benefits by addressing minor spikes and surges that appear on the mains on a regular basis. In our opinion, these high voltage spikes can raise the background noise level in amplification circuits which is why it makes good sense to try and reduce them.

    We recommend factory replacement of all SuperClamp components every five years to maintain their effectiveness - click here to read more.

  • 10A IEC socket. X Blocks are fitted with a 10A IEC socket, allowing you to choose the level of mains cable you desire. We recommend a minimum of the Evolution-100 PowerKord™

  • Need more sockets?

    Click here for the X4, here for the X6 and here for the X8.

    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.

    Upgrade Scheme

    Our Upgrade Scheme normally allows you to upgrade from an older extension further down our range, of the same number of sockets, or greater. As the X2 only has two sockets, we will take each order on a case by case basis - if you have an older extension you would like us to consider as an upgrade, contact us on 01539 797300
    For full details of our Upgrade Scheme, click here.


    2 UltraSocket™ outlets, treated with DCT and DeoxIT®

    Wired with Kimber TCX™ cable

    Russ Andrews Silencer™ mains filter

    Russ Andrews SuperClamp™ surge filter

    10A IEC mains socket allows you to connect your choice of mains cable (not supplied)

    Impact and fire resistant ABS casework


    The 2, 4, 6 and 8 way Height and Depth dimensions of the X-BLOCKS are the same, only the length differs. The height includes the feet and sockets.Height: 65mm
    Width: 85mm

    2 way length: 165mm

    4 way length: 285mm

    6 way length: 405mm

    8 way length: 525mm

    Please note that X-Blocks do not include a mains cable - we recommend a minimum of our YellOPower and ideally an Evolution-100 PowerKord or better; click here for details


"By allowing your electronics to give their best, this mains block is worth every penny"

Read more about the What Hi-Fi review here

[allows your system] "to truly perform as it should without sounding held back... recommended without hesitation"

Read more about the What Hi-Fi review here

"will provide an enhanced performance for any hi-fi"

Read more about theaudiophileman.com review here

"worked very effectively, giving a smoother and more relaxed sound"

Read more about the Hi-Fi Choice review here

Customer Reviews
Overall product rating 0 / 5