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KLEI gZero6 SCs by Steve Reeve (Fine Art)

KLEI gZero6 SCs by Steve Reeve (Fine Art)

Fresh on the heels of the KLEI Essence®gZero2 Speaker Cable(SC) Review on this blog, the guys at KLEInnovations (KLEI) sent me a pair of their top-of-the-line Essence®gZero6 Speaker Cables to review.

At first glance, the KLEI Essence®gZero6 SCs look almost identical to the KLEI Essence®gZero2 SCs, but it appears to have a second conductor on the neutral line, as can be seen by the twisted conductor in the photo above. This is an indication that they utilize an enhanced implementation of the KLEI Essence®gZero cable architecture in the neutral line whereas the signal line appears identical.

Having reviewed items in the current KLEI Product Line-up, I’ve come realize that you cannot judge these books by their covers.

The “Looks”Conundrum

I am constantly amused by comments made in audio circles about the looks of cables and connectors. The nice gold or rhodium plating, the in-vogue carbon fibre look etc. After all, cables generally sit behind the components and are seldom seen, unless of course you have the big mono-block amps that need their very own one cubic yard of open space and generally located to the front and between the speakers, since they provide some very pleasing “Eye-Candy” – BUT CABLES? So I ask, aren’t the looks of a cable secondary to how they actually perform? Not that any of the KLEInnovations cables look cheap – they are very nicely made, with a very understated appearance. Anyhow, Back to the Books and their Covers….

So what is “under the covers”?

KLEInnovations (KLEI) take their competitive design advantage very seriously, so what is on their web site is about all you will find out about their construction methods. Basically, they use a combination of very high quality copper and/or silver conductors that are constructed in accordance with KL’s Essence®gZero architecture, which combats the effects of electrical noise that is induced into conductors from adjacent conductors and also all connected components during normal operation.

So What Are The Issues…

When you have two (or more) insulated adjacent (i.e. parallel) conductors, i.e. as in most “conventional” cable designs, the following issues can arise…

  • When an AC voltage is applied to one conductor, electrical “noise” will be induced into the adjacent conductor(s)
  • two adjacent cables will experience reactive/EMF/EF effects due to the cable’s inductance and capacitance which varies with frequency
  • long straight wires are also prone to RF/EMF/EF effects from external sources
  • there is also “ground noise” which is introduced by the actual components attached to the cables.

But the team at KLEI has come up with a very different approach…

  • Their Goal: “The KLEI Essence®gZero architecture dynamically works to maintain a zero voltage Ground state”
  • Their approach: “In accordance with KL’s Signal/Ground Formula, the KLEI Essence®gZero architecture is comprised of hand wound conductors, and implemented in a manner to dynamically enhance electron flow in the Signal conductor, without the use of electronic components.
  • The Result: “This has the effect of protecting the signal conductor from ground induced capacitive and inductive reactance, which facilitates smooth uninterrupted signal flow from one component to another, effectively isolating them and allowing them to perform their task without interference.”

So, if their Design works, then you should have about the purest transmission of a signal from one component to the next – Yes?

So, did their Design work?Yep! there ya go! they’re awesome!… go out and buy them! I’m done!

But for those of you that would like further detail about their performance…

Thanks to the team at KLEInnovations the cable set I received had undergone Factory Burn-in, otherwise I would have been faced with a recommended burn-in period of around 300 hours. As is, KLEI still suggested I allow 3 days before any serious listening. But right from the first track, one improvement was very apparent, the extension to the bottom end was significantly lower with more control and more bass detail (not to be confused with “more bass” as in bloating). This was an extension into much lower frequencies of the bass register, compared to what was, an already outstanding bass performance from the Essence®gZero2 Speaker Cables.

As time went by the openness of these cables made for an extremely open and realistic presentation, especially on tracks that were not “over engineered” i.e. most classical albums, jazz albums and live performances. Even the over extended bass lines often present on R & B albums were still very well controlled and not prone to bloating, as can sometimes be the case. Some tracks that really highlighted their openness include…

  • Norah Jones: Not Too Late – beautifully engineered in it’s simplicity, very few effects are applied to her voice making for a truly individual performance
  • Norah Jones: My Little Room – even better, Just Norah, a guitar and Double bass – all in my living room playing to me.
  • Nellie Furtado: Saturday – again wonderful simplicity in the engineering with Nellie, an acoustic guitar, background vocalist and the natural acoustics of the studio – the fun they were having was superbly conveyed.
  • P!nk: Crystal Ball – just P!ink, a guitar and a harmonizing vocalist – simple, but incredibly pure
  • With this combination of excellent sound engineering and the Essence®gZero6 Speaker Cables – an artist has no where to hide imperfections.

As the burn-in period completed, the dynamics, openness and clarity these cables conveyed, for me, became their “defining signature”.

As my auditions progressed I also became aware that I was listening at a significantly louder level than normal, which for me is unusual, because I normally find loud music very difficult to focus on.

  • It seems these cables allows the amp to fully control the speakers such that the detail and clarity was never overwhelmed by a single instrument, e.g. drums or bass, that can sometimes occur when played at loud volumes.

In this respect, the album I had most fun with was Roxette’s Don’t Bore Us – Get To The Chorus (Greatest Hits). It is possibly the most Dynamic album I have in my collection, with incredibly dynamic drums, piercing guitar riffs, deep synth work and very punchy bass lines. This album alone demonstrated just how good the KLEI Essence®gZero6 SCs are at exerting complete control over my speakers – even when played REALLY LOUD!

Out of curiosity, I reconnected the KLEI Essence®gZero3 ICs, since I felt that their performance might also benefit from the extended abilities of the KLEI Essence®gZero6 SCs.

  • As suspected, they contributed nicely to their performance, elevating them to a more realistic and natural reproduction.
  • But when used in combination with the KLEI Essence®gZero6 ICs, they transport you into the heart of the performance.

Reflecting back on the performance of the KLEI Essence®gZero2 SCs, I recall listening to them for the first time had me wondering whether the cables were colouring the sound, mainly because some of the more “engineered” tracks sounded so different.

  • To verify this was not the case. I turned to classical albums to assess their reproduction accuracy, which reassured me they were completely neutral and well balanced in their delivery.
  • Since the KLEI Essence®gZero6 SCs perform to an even higher level, listening to them for the first time may accentuate this phenomenon, so take time to audition a lot of tracks – they will astound!

So I guess, with more of everything and no downside, KL’s Signal/Ground Formula has proven itself. Not only as a theory, but in a very practical demonstration at a level of performance I had not expected to achieve with my particular system components.


  • If you want a big, bold, controlled presentation that is dynamic, crystal clear, and spacious then the KLEI Essence®gZero6 SCs will not disappoint.
  • They will change the sound of your system in ways you might not anticipate.
  • They will contribute to significant improvements in systems of all price points, elevating the performance of even modestly priced systems to levels that equal systems of a much higher price point.
  • But as the performance level of the system becomes more articulate, detailed and well defined, so will the performance of the KLEI Essence®gZero6 SCs.
  • They will allow the amplifier to take control of your speaker and bring out their best performance.
  • All KLEI Essence®gZero Cables are a family, they augment each others abilities, so it really does not matter which combinations you select – they will perform to an extremely high level.

A Review Qualification

  • One thing that became apparent over the course of the reviews of the KLEI Essence®gZero and KLEI Harmony®Plug product lines from KLEInnovations, was the impact good power cables has on system performance.
  • To get the very best out of your system and these cables you need good power cables
  • If you try the KLEI Essence®gZero cables and feel that they do not perform to the levels I have observed in these reviews I would urge you to try some different power cables.
  • There are several posts on this blog that may assist you


One comment

  1. Realize the Organic Realness in the Musical experience, with KLEI 🙂

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