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SuperClamp ULTRA UK version

5 out of 5

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Ultimate SuperClamp performance

The SuperClamp Ultra is a plug-in device designed to improve the sound of your Hi-Fi or Home Cinema by reducing the effects of mains voltage spikes. SuperClamp Ultra is the most sophisticated model in the SuperClamp 'family' of products and offers the best performance.

SuperClamps consist of two components – one a fast, solid state device culled from aerospace applications and the other a varistor to absorb the spike energy. The SuperClamp Ultra circuit contains multiple SuperClamps and also employs a component that reduces spike activity on the earth. The SuperClamp Ultra is mounted in a 'wall-wart' type box and should be connected close to your Hi-Fi or Home Cinema system. The effect of the SuperClamp Ultra can be augmented by additional SuperClamps.

Maintaining their effectiveness

The components in SuperClamp Ultras wear out over time and become less effective: we recommend replacing SuperClamp components every five years. Any product with a SuperClamp can be returned to us for factory replacement of the parts at lower cost than buying a new one. Click here to find out more about SuperClamp renewal.

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.

  • Voltage spike and surge 'clamp' offers effective spike reduction
  • Sophisticated circuit offers best performance of the SuperClamp family of products
  • Dimensions: H:78mm W:50mm D:48mm
What are spikes?
A spike is a very brief over-voltage 'event' ranging from a few tens of volts above the highest legal peak voltage (360V for 230V), up to several thousand volts. They are typically under 1 millisecond in duration, are very common and often (though not always) the energy involved is small. Longer duration events are called surges and have the potential to do more damage, but mercifully these are less common.

Spikes are caused by things such as lightning strikes, power outages, tripped circuit breakers, fluorescent lights, refrigerators and washing machines switching on and off. The quality and severity of spike activity varies during the day, and from day to day. Even with well-designed equipment, spikes or transients – if regular – can and will prematurely stress and wear out critical mains-connected parts and their insulation.

In our opinion, high voltage spikes can also cause audible degradation of Hi-Fi sound by their effect on a Hi-Fi system's power supply and by raising the background noise level in amplification circuits. The spikes saturate the core of the mains transformer, preventing normal transformer operation during the period of each spike and causing distortion to the waveform. Mains spikes reduce the capacity of the power supply by 'strangling' the transformer operation producing subjective effects on an amplifier like softened bass and increased high frequency distortion.
Customer Reviews
Overall product rating 5 / 5
5 / 5

reviewed by Alan Saltmarsh
15 Jan 2020
Yes, I recommend this product.
"Superclamp Ultra"
Well, I was a bit sceptical regarding purchase
, but this has taken away the background hash leaving a quiet background with the music becoming much clearer , better defined bass & much more stable even at low volume. More rhythm , and very enjoyable to listen to . The Yellow powercords are a benefit too !! Ruark R4