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The Select Series

Search for perfection

Maintaining a healthy environment for your audio or AV system is essential for recreating realistic audio performances. IsoTek’s multi-award-winning Select series of products guarantees to provide your system with vastly improved power, ensuring that you achieve the best possible audio quality whenever you listen.

Ownership of a Select product will maximize your musical enjoyment through innovative proprietary technologies, which have been independently acknowledged to be the finest money can buy and endorsed by numerous audio magazine reviews and awards not only in the UK but also worldwide.

The Select Products

V5 Sigmas

The V5 Sigmas is the bigger brother of our highly respected V5 Aquarius. Offering 4 medium power outlets, rated at 10A and 3 high current 16A, driven by a light version of the Titan’s Direct-Coupled© circuit. It represents an extremely cost effective full system upgrade.

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EVO3 Nova

The EVO3 Nova is a state-of-the-art passive power cleaning system incorporating full DC cancellation. The system offers 12 independently filtered power outlets, eight rated at 10A and four rated at 16A, these designed for high current electronics, for example power amplifiers, active loudspeakers, or subwoofers. These also feature a slightly pared down version of the Titan’s unique Direct-Coupled© circuit. Nova is a full system solution, full system upgrade incorporating 12 independent filter networks, each supporting its own output socket.

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V5 Titan

The new V5 Titan is a progression of IsoTek’s original multi award-winning design. Whilst utilising the unique Direct-Coupled© technology, the circuit has been radically updated with 50% increased PCB copper-loading. V5 Titan is the ultimate high current conditioner in the smallest form factor.

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The Select Awards & Reviews

Award / Review
V5 Sigmas CZ

“V5 Sigmas is a great solution…. it surpasses what we’ve had the opportunity to hear in the power filter segment so far. So great and convincing, in fact, that it was immediately added to the editorial equipment alongside the V5 Titan.”

Daniel Březina – Hi-Fi Voice

Award / Review
V5 Sigmas

“The jump from EVO3 to V5 might be considered ‘evolution’ and not ‘revolution,’ but only on paper. In real-world performance terms, it’s a honking great big step forward in sound….. EVO3 Sigmas made decent systems sound more realistic, and the V5 Sigmas improves upon that realism significantly.”
Alan Sircom – October 2023

Award / Review
hi-fi+ Product of the year


“V5 Titan improves upon that performance in every way. Once you’ve (not) heard it working, it’s hard to go back.”

Hi-Fi+ Magazine

Award / Review
Hi-Fi+ Editor’s Choice 2020 Award for Evo3 Nova

“I used it with a range of digital and analogue audio devices, in part to try and fill up all its sockets to test it under stress. Except it didn’t get stressed. It took everything in its stride.”

Award / Review
EVO3 Nova Video Review at Persuit Perfect System

“I was extremely impressed with the Nova, and it was an integral part of me achieving the best sound I have ever heard from my review system.”

Award / Review
Audio Accessory Excellence Award 2020 for EVO3 Nova

“Perfect effect as a power conditioner – vivid and beautiful sound stands out, and the taste is also natural and clear in the dynamic range.”

Award / Review
EVO3 Nova is Power Product of the year

“We concluded simply that, ’The EVO3 Nova takes on the task for today’s bigger systems.’“

Award / Review
Main Thing – EVO3 Nova in HiFi World

“The EVO3 Nova had a positive effect when it came to the reproduction of music. In my system it was a great benefit … A unit you should consider auditioning if you own a top-end system. OUTSTANDING – amongst the best!”

Award / Review
Hi-Fi+ Equipment Review for Evo3 Nova

“EVO3 Nova also does that great thing that IsoTek devices are so good at; enhancing without changing. The system seems to be taking less effort in making music, and does so with vastly improved transient attack and speed of delivery, and yet somehow does all this without changing the character of the products connected.”

Twelve power conditioners in one box

IsoTek the leading brand of power conditioning solutions for hifi and home cinema systems has launched the next generation of the Select Series.

Award / Review
Experts Choice Awards

“The sound in the upper register becomes ordered and calm, the lower band bass denser. In the middle there is added brightness, but at the same time revealing a lot of new tonal colours. Sound as a whole becomes more pleasant and interesting. EVO3 Sigmas gets our ‘Experts Choice Award’.”

Award / Review
Boost to Your System

“There are very few products that can deliver improvement across the board to a multiple unit system, but this is very definitively one of them. If you are looking for a wholesale boost to your system, the EVO3 Sigmas is it”.

Award / Review
The heart of a high quality system

“I cannot imagine a serious high-end system in the high-end price bracket without an EVO3 Sigmas. The perfect installation for music reproduction should always be built around the Sigmas because it is the heart of a high quality system.”

Award / Review
State of the Art

“IsoTek is producing state-of-the-art power devices. I can emphatically recommend the IsoTek EVO3 Sigmas.”

Award / Review
Amazing Enhancements to the Overall Sound

“I fully believe every Audiophile should understand the importance of Electricity in their audio system. However, mostly, those who have tried have had bad experiences, poor sonic quality and bad performance. These poorly designed AC Filtering devices have had such negative effects that it has caused many to simply give up and not use AC filters at all. The good news is that IsoTek’s EVO3 Titan removes any fears of poor performance. The Titan maintains the original tonality of the connected equipment, but also adds amazing enhancements to the overall sound.“


Award / Review
Nothing short of superb

“There are some upgrades that, once heard, cannot be lived without… I can only congratulate IsoTek on this product. It is nothing short of superb. A very successful upgrade of the GII Titan.”


Award / Review
Improvements in every aspect

“The improvements in every aspect of the (connected) equipment’s performance are so obvious that it is a complete ‘no-brainer’. An essential purchase, Outstanding.”

Enhanced high current power conditioner

IsoTek – the class-leading brand of mains conditioning solutions for enhanced hi-fi and home cinema performance – has unveiled its successor to the multi award-winning GII Titan power conditioner: the “radically updated” EVO3 Titan.

New enhanced EVO3 version of IsoTek’s award-winning Sigmas

IsoTek – the game-changing brand of mains conditioning solutions for enhanced hi-fi and home cinema performance – has unveiled its successor to the award-winning GII Sigmas: the EVO3 Sigmas.

Where to buy

Clean Power for 50+ Countries

IsoTek has appointed distributors across the world to support its products and to give you the customer the best local service by professionals appointed through our distributors network. Please choose your country to find a local IsoTek supplier near you.