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Foundation XL

Power Cables

Benefitting from learnings upon the development of our flagship SRX XL cable line, our new Foundation XL power cables deliver notably improved performance above the Foundation SX series and continue to be offered at attractive price points. While the line as a whole can be thought of as an evolution from the Foundation SX, the cable has been rethought holistically, applying the same improvements we’ve made to our new flagship SRX XL cable series.

For each cable type, we’ve doubled the 6N pure silver Air Strings to portray music with more immediacy and resolution, improving upon dynamics and transient response in a completely non-fatiguing way. We apply the same SRX XL UEF compound as described above to improve shielding. And finally, the cables are run through the same SRX XL High Voltage Conditioning treatment that we use for our flagship SRX XL cables.

With Foundation XL, you’ll notice an improved dynamics and a more natural timbre, all with a reduction in noise floor to keep details of the music smoother and more realistic than its predecessor.

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Foundation Cable Series Awards

UEF Matrix Shield with Graphene

SRX XL Matrix Shielding

In our journey to design our latest flagship SRX XL series, we developed an entirely new UEF compound to elevate the performance of our previous Matrix Shielding, which further lowers each cable's noise floor while lessening restraints a shield may have on signal transmission. We apply this highest level of SRX XL Matrix Shielding to our new Foundation XL cables for a significant jump in performance over the previous generation Foundation SX. Carbon Fiber UEF Tuning Discs developed for the Foundation SX and Foundation XL series cables further refines and enhances the loom's ability to cancel noise that would otherwise cause high frequencies to sound harsh or fatiguing.

Enhanced Cable Geometries

6N Pure Silver Airstrings, Multiplied

While voicing the Foundation XL, we found that doubling the 99.9995% Pure Silver Airstrings resulted in a cables that are faster and more resolving, adding texture and body while improving dynamics and transient response without adding fatigue.

Quantum Tunneling

SRX XL High Voltage Conditioning

The new SRX XL High Voltage Conditioning is our most advanced process for treating cables with 1,000,000 volts of electricity at specific frequencies and pulse modulations for long durations, creating a canal in the conductor material and contact points at the molecular level that allows electrons to flow more freely. This new process improves upon the SRX High Voltage Conditioning process by employing new extended duration sweeping frequency plots and advancements to our Tesla Coil, resulting in SRX XL cables to sound even more open and accurate than the cables before them. For Foundation XL, we utilize this exact conditioning process, which we found to contribute to the large performance improvement in this series, bringing the voicing of the Foundation XL closer to that of the SRX XL.

Included Carbon Tuning Discs

Tune to Perfection

Included with Foundation XL interconnects, speaker cables, and power cables, Carbon Tuning Discs ($199.95 MSRP) are a spinoff of our new Atmosphere SX Loom where they are placed inside cables at key locations and are instrumental in creating the SX sound. Based on our patented UEF technology, each disc gets treated with a unique UEF compound that interacts with EM fields wherever you place them in your system or on cables to improve sound quality. The conductive carbon fiber material of the disc enhances the interaction between the UEF compound and the surrounding EM fields where it is placed.  The Gold- Carbon Tuning Discs flesh out rich harmonics combined with a clarifying effect in the sound field for a more lifelike and holographic presentation. Purple- Carbon Tuning Discs get treated with a UEF compound that enhances clarity and extension in the soundstage even beyond Gold.

Foundation XL Power Cable Specifications:

Foundation XL 10 AWG High Current
Global MSRP
US $1199.00/5ft. (+$120/ft.)
Foundation XL 12 AWG High Current
Global MSRP
US $999.00/5ft. (+$100/ft.)

4 each 99.9995% Pure Silver Airstrings

3 each 12 awg. SR Copper:  (FOUNDATION 12 AWG AC)

3 each 10 awg. SR Copper:  (FOUNDATION 10AWG HIGH CURRENT AC)

  • Dielectric: (EPDM) Ethylene Propylene and PTFE Airstring Dielectric
  • Connector Input US: 1 each Synergistic Research C07 Pure Copper
  • Connector Input Int’l: 1 each Synergistic Research C07 Pure Copper
  • Connector Output US: Synergistic Research G07 Gold IEC 15 amp
  • Connector Output Int’l: Synergistic Research G07 Gold IEC 15 amp

Build Notes:

  • SRX XL Matrix Shielding: UEF coating with Graphene is applied directly to connectors significantly reducing the noise floor and allowing a purer signal to transfer with less grain providing more warmth and detail
  • Silver Solder: 4%
  • Hand build time: 2 hours
  • SRX XL High Voltage Conditioning Treatment: After the cable is completely assembled all connections and cabling are treated with 1,000,000 volts of electricity at specific frequencies and pulse modulations, creating a canal in the conductor material and contact points at the molecular level that allows electrons to flow more freely. This allows the maximum amount of low level information through the conductors and provides for the highest amount of realism in your music
  • Secondary UEF Blue Treatment originally developed for SR Blue Fuses
  • Handcrafted in our California factory

Voltage and current Rating:

  • US: 20amp/125v
  • (EU/AU/UK): 16amp/250v

A/C Cables also available in these Wall Plugs

Schuko

CEE 7/7 (Type F)

United Kingdom

(Type G)

UK Plug with SR20 fuses
+ additional $150 MSRP

Upgrade SR20 to UEF Purple Fuse ($195.00 MSRP)
+ additional $75

Upgrade SR20 to UEF Master Fuse ($595.00 MSRP)
+ additional $325

Australian

(Type I)

Foundation Cable Series Reviews

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"Jonathan Valin wasn't expecting much- and certainly not this much-from Synergistic Research's immensely pliable, bargain-basement Foundation Series interconnects and cables, which are far slimmer, lighter, and less sophisticated in design than their rich relatives, the superb Galileo SXes. But, trust him, sonically the Foundations come way closer than shouting distance to the Galileos.  Indeed, these two SR lines have a great deal in common-rich vibrant tone color, robust dynamics, spacious staging, lifelike imaging, high resolution.  Oh, the more sophisticated Galileos are less bottom-up in balance, more finely detailed, and harder-hitting than foundation: then again, they ought to be-the cost ten-to-twenty times the dough.  Put plainly, the Foundation Series is the best budget-priced wire Jonathan Valin has hear-and one of his references. (forthcoming)" 

50 Greatest Bargains in High-End Audio
The Absolute Sound, 2020 Buyer's Guide

Synergistic Research is clearly on the cutting edge with their flagship Galileo line and new SRX power cable. The new Foundation Series cables are ample evidence of trickle down technology designed to capture new customers at price points where a lot of audiophiles call home. Dressing my gear with a complete loom from sources to speakers produced a consistency of sound among the different sources and easily revealed the differences when other components were swapped into the rig.

 I was skeptical that the Foundation cables would make such an improvement in my system, yet they have replaced cables that cost far more and taken my music far higher. Combined with a handful of their fabulous Orange Fuses, a $2000 to $3000 investment toward Synergistic Research's Foundation cables has taken my mid-five-figure rig well into six-figure territory. That's real value and an admirable feat!

Rick Becker, Enjoy The Music, January 2020

Full Review >

"They were very detailed and dynamic with stellar bass and beautiful harmonics. I really could find no fault with them and they were very musical. They were just superb cables that got out of the way and allowed the harmonics to pour out. It was hard to pin a character on them as they were very neutral sounding in this combination. A stellar interconnect that deserves an audition."

"the ultimate question is whether the Synergistic Foundation SX cables contribute enough to the musical experience and bring the listener closer to the musical event. I have found them to be so musical that I will be asking Synergistic Research for an extended evaluation so a few friends of mine can see how they compare with their costly cables and use them in future reviews. They are very good musical components and deserve an audition."

Jeff Wheaton, Secrets of Home Theater, October 2023

Full Review >

"The Foundation SX cables may be the entry-level into Sytnergystic Research, but you are certainly not getting an entry-level product. Sound aside you get very well-made (in America) cables that look as good as they perform." "I don’t think that my system is at the top of its performance capability so if I had purchased these to own I wouldn’t have to worry that as soon as I get a better amp or speakers I would need to upgrade the cables. There is nothing worse than buying something than feeling like you need to upgrade immediately, and I think the Foundation SX line from Synergystic Research, offers a good value in the world of Hifi Cables. These cables could work well in systems costing many times what my own system costs. That said SR’s higher lines will offer more performance for those with systems that can take advantage of the benefits. If you are in the market for a new set of cables for your system, you should audition the Foundation Cables in your own system to see if the fit is right for you.

Anton Wyler, Hifi Chicken, May 2024

Full Review >

"Clearly, you are getting a fairer taste of Synergistic technology and build-quality than you might’ve expected in the affordable Foundations.  But it isn’t the relatively sophisticate way they’re made, but how they reproduce recorded music that comes as the true surprise."

Jonathan Valin, The Absolute Sound, April 2020

Though my current set of Crystal cable Ultimate Dream wires from Gabi and Edwin Rijnveld of Crystal Cable and Siltech is undoubtedly the best (the most vividly and accurately colored, powerful, quick, detailed, three-dimensional, just plain lifelike) stuff I’ve had in my system in better than forty-five years of cable-swapping, its incredibly lofty price tag brings into painful focus a problem I’ve had with “gourmet” cables from the get -go.  You see, that “loom” (in the parlance of our time) of Ultimate Dream costs as much as my reference MBL 101 X-tremes, the MBL electronics that drive them, and the MSB DAC, the Walker and Clearaudio turntables, and the United Home Audio reel-to-reel tape deck that feed those electronics put together! You’d not only have to be stupid rich; you’d also have to be clinically insane---or an audiophile, which, I guess, amounts to the same thing-to buy it. (And the funny part is that the Ultimate Dreams don’t even come close to the sticker shock of the most expensive cable and ICs out there.)

Over the years, the exorbitant cost of high-end cable has troubled me that I used to regularly swap out whatever goodie I was currently listening to for old-fashioned zip cords of various twists and gauges, just o make sure that I was hearing what I thought I was hearing---and not falling for the price tag.  Of course, the losses of bandwith, resolution, transient speed and definition, density of the tone color, and lifelike dimensionality, solidity, and presence were always and inevitably the same.  Which is why, after a decade or so, I stopped AB’ing and just accepted the fact that (to a greater or lesser degree) when it comes to wire you get what you like and what you pay for.  My only proviso when it came to cable-swapping was this: If I found something I enjoyed, I stuck with it rather than moving on (as I have so often done with other kinds of components)to the next “best” (and inevitably more expensive” thing.  After all, as my dear departed friend Ray Andrews used to say: “How good does ice cream get?”

Which brings me to the product under review, Synergistic Research’s new budget line of cables and interconnects, the Foundation Series.  At $599 for a one-meter pair of interconnects and $649 for an eight foot pair of speaker cable, the Foundations are indeed reasonably priced.  They are also downright plain-looking. Unlike Synergistic’s expensive offerings, they have no in-line filters, no ground wires with associated outboard active grounding stations, no tuning modules with gold and silver “bullet” attachments.  No fat, hefty, gough like twists of wire, either. In their simple black or white coverings, the Goundation look almost anorexically thin, light, and basic, through their looks belie the relative sophistication of what’s inside their plain-Jane wrappers.

Each Foundation RCA interconnect has four (six for the XLRs) 99.9999% pure monocrystal silver conductors in an air deliectric with a braided-silver, “Quantum-tunneled” shield.  The connectors (silver Teflon SR 20 RCA or Neutrik (NC-3MX-BAG XLR) are coated with graphene to lower noise and are silver-soldered to the conductors by hand.  The speaker cable has foru 99.9999% pure monocrystal silver plus four 99.95% pure “ high-current” copper conductors in an air dielectric with braided-silver, “Quantum-tunneled” shielding.  Once again, the terminations (SR BoFa Banana and SR Silver Spade connectors” are silver-soldered to the conductors by hand.  Both the ICs and the cables are said to be burned-in at the factory for five days, in a two-step process.

Clearly, you are getting a fairer taste of Synergistic technology and build-quality than you might’ve expected in the affordable Foundations.  But it isn’t the relatively sophisticate way they’re made, but how they reproduce recorded music that comes as the true surprise.

It’s been my experience with high-end-audio components that they often (though by no means invariably) sound the way they look.  So something that appears to be markedly thin, light and basic-as the Foundations certainly do-tends to sound thin, light and basic.  Though these Synergistics done completely overturn this paradigm-sonically, they are certainly thinner, lighter, and less complexly and fully detailed than the 65-times-as-expensive Crystal Cables (or than Synergistic’s own 27-times-as-expensive Galileos)-they are nothing like the tissue-paper cutouts that I’ve come to expect from budget wires.  Indeed, and in spite of some clear losses in focus an at the frequency extremes, they sound more like Synergistic’s high-priced offerings (Galileo has been one of my references for almost a decade) than anyone could reasonably expect.

Take, for instance, a recording I’ve been listening to a lot lately-guitarist/vocalist Hans Theessink’s 2011 LP Jadermann Remixed-The Soundtrack, on the Austrian Blue Groove label.  As I said in my Clearaudio Master innovation review (TAS 301), this is a record that will sound more or less great on just about any bonafide high-end system.  The tricky par-and the entire raison d’etre of The Absolute Sound-is the “more or less.”

Theessink’s mainly acoustic blues and gospel numbers are, as I noted in Issue 301, lit up like a musical Christmas tree with marvelous instrucmental ornaments-from the thrilling bottleneck glissandos of slide guitar to the coffeepot burble of the Hammond organ vamps-but the centerpiece is Theessink’s Johnny Cash-like baritone (backed up by the vocals of Terry Evans and Bobby King).  Via my reference Brystal Cable Ultimate Dreams, Theessink’s voice is smooth, dark, and husky with deep throat and chest tones, wonderfully focused (without any sense of edge enhancements or redction of natural size), and shockingly three-dimensional and realistic-as are the accompanying voices, guitars, and other instrucments, which have the speek, color, and transient detail of life.

With everything else remaining the same, the Synergistic Foundations reatian a surprising amount of this same sonic realism on voices and guitars, etc.  However, timbre, through quite plausibly lifelike, is not as rich, dark, and vibrant, and images (both at centerstage and at the sides) are not as well-defined as they are via Ultimate Dream.  It’s as if (as is probably the case) a small blur of noise has crept into the presentation, slightly (and I mean slightly) de-focusing images, softening transients, bleaching timbre, damplening down the high-end air that makes studio ambience so audible with the Ultimates, and introducing a bit (though not a particularly annoying bit) of shoutiness on fortes and gortissimos, particularly at very high volume levels.

Still and all, the noise that is being added by the Foundations does not keep Theessink from sounding like himself.  (Indeed, one could argue that the Foundation is slightly more neutral in midrange balance, albeit less detailed and extended at the frequency extremes, than the much richer, darker, quieter Ultimate.) Nor does the Foundation’s mild de-focusing of images and slight shoutiness on fortes keep Theessink’s voice (and the accompaniment and backup vocals) from sounding “there.”  Yes, vocal and instrumental are a bit outsized, desaturated in color, thinner in substance, and less well-controlled on hard transients, but they haven’t lost their inherent character and with it their tast of realism=as has so often been the case with budget wire in the past.

What is true of the Theessink recording is true across the board.

Now, I have to remind you that the comparison I’ve been making-between Synergistic Foundation and Crystal Cable Ultimate Dream-amounts to a difference in dollars that would allow you to buy the rest of the system I’m currently using, with money left over. Is Crystal Cable’s Ultimate worth that much dough-and is Synergistic’s Goundation that much lower in fidelity?  To those questions, I’d have to answer:”Yes” and “No” If I could afford Ultimate Dream, I would but it, but then I’m crazy.  If I weren’t crazy, I could happily live with the Foundation with give you approximately 35%-40% of what the Ultimate Dreams offer, for sixty-five times less dough!  If that isn’t a bargain, I don’t know what is.  One of the highest-fidelity budge wires I’ve hear, Foundation obviously comes enthusiastically recommended.

Foundation has the added bonus that for more attainably priced systems, it covers its tracks well and could stay in a system for the long haul; in fact, it’s only when you insert them in a monumentally high-end wide bandwidth system do you begin to crave even more detail and extension… which points you further up the Synergistic range. And best of all, it makes systems sound coherent and entertaining and both of those qualities seem to evaporate at Synergistic’s removal. 

Synergistic Research has taken the technologies used in its top cables and trickled down to an affordable level without sacrifice. Foundation is an excellent, er, bedrock in audio that can make a potentially good system into a really great one. 

Alan Sircom, HiFi+,  July 2020

Full Review >

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It becomes clear why the fine-tuning of placement matters almost the moment you put the Black Box in the room. Ignoring the bass for a moment, careful tuning snaps the soundstage into sharp focus, adding significantly to the air around instruments within that stage. We can’t ignore bass for too long as that ‘snapping’ into focus has a significant impact on soundstage solidity. Instruments that were seemingly ‘floating’ around the stage are now so ‘planted’ in 3D space, you’ll feel like watering the musicians. This is helped by a distinct sense of improved midrange clarity and even high-frequency extension.

And it’s now that we get to that bass; the Black Box excels at defining the shape and texture of bass notes, whether they are bowed, plucked, struck or electronically derived. Bass notes don’t just ‘start’ and ‘stop’ with greater precision; the physical ‘thereness’ of bass sounds are so precise you will be more able to recognise the difference between both instruments (like a Fender Jazz and Fender Precision bass) and the different style of otherwise very similar players. And, as ever, it’s outstanding at portraying musical intent; letting the musical presentation of the audio equipment do what it does best.

Alan Sircom - Hifi+ - December 2022

Full Review

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