{"product_id":"synergistic-research-foundation-xl-ac-power-cable","title":"Synergistic Research Foundation XL AC Power Cable","description":"\u003ch2\u003eBenefitting 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.\u003c\/h2\u003e\n\u003cp class=\"n6owBd awi2gc\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eIn 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.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"n6owBd awi2gc\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWhile 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.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"n6owBd awi2gc\"\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eThe 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.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"n6owBd awi2gc\"\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eIncluded with Foundation XL interconnects, speaker cables, and power cables, Carbon Tuning Discs 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.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv itemprop=\"description\" class=\"description bottom\"\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cstrong class=\"rQesXe MPyX\"\u003eConductor Complement:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Features \u003cspan class=\"rQesXe MPyX\"\u003e4 x handmade 99.9995% (6N) Pure Silver \"Air Strings\"\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e (doubled from the previous SX generation) combined with 3 x Synergistic Research Copper Matrix alloy conductors\u003cbr\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eAvailable Gauges:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eFoundation XL 12 AWG AC:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Optimized for source components, DACs, and preamplifiers.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eFoundation XL 10 AWG High Current AC:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Tailored for heavy-duty power amplifiers, monoblocks, and power conditioners\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong class=\"rQesXe MPyX\"\u003eDielectric System:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eSealed PTFE Air Dielectric for the pure silver runs paired with Ethylene Propylene Diene Monomer (EPDM) for the copper runs\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong class=\"rQesXe MPyX\"\u003eShielding:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eUpgraded \u003cspan class=\"rQesXe MPyX\"\u003eSRX XL Matrix Shielding\u003c\/span\u003e utilizing an advanced UEF compound infused with Graphene applied directly onto the connector bodies\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong class=\"rQesXe MPyX\"\u003eQuantum Treatment:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Flagship \u003cspan class=\"rQesXe MPyX\"\u003eSRX XL High Voltage Conditioning Treatment\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e (cables are treated with 1,000,000 volts of electricity using extended duration sweeping frequency plots via Tesla Coil).\u003cbr\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong class=\"rQesXe MPyX\"\u003eSecondary Treatment:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Secondary UEF Blue treatment (originally formulated for SR Blue Fuses)\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eCarbon Tuning Discs:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Includes detachable Gold and Purple discs allowing you to physically voice the cable's sound profile for warmth or air.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eHand-Built Quality:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Assembled by hand in the California factory, ensuring strict quality control and exact termination standards.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong class=\"rQesXe MPyX\"\u003eTerminations:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Plugs feature a \u003cspan class=\"rQesXe MPyX\"\u003eSynergistic Research C07 Pure Copper wall plug\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e and a \u003cspan class=\"rQesXe MPyX\"\u003eG07 Gold-plated IEC 15-Amp component plug\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e, put together using a 4% silver solder compound\u003cbr\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eMade in USA\u003c\/strong\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\u003c\/ul\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\u003c\/ul\u003e\n\u003cul class=\"U6u95\"\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch5 class=\"eight columns medium-down--one-whole  omega\"\u003eSpecifications\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eConductor Complement:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 4 x handmade 99.9995% (6N) Pure Silver \"Air Strings\" combined with 3 x Synergistic Research Copper Matrix alloy conductors.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eAvailable Gauges:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 12 AWG Standard (optimized for sources\/preamps) or 10 AWG High Current (optimized for power amps\/conditioners).\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eDielectric System:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Sealed PTFE Air Dielectric for the pure silver conductors and Ethylene Propylene Diene Monomer (EPDM) for the copper conductors.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eShielding:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e SRX XL Matrix Shielding with an advanced UEF compound infused with Graphene applied directly onto the connector bodies.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eSolder Formulation:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 4% Silver Solder content compound.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eQuantum Treatment:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Flagship SRX XL High Voltage Conditioning (1,000,000 volts via Tesla Coil using extended duration sweeping frequency plots).\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eSecondary Treatment:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Secondary UEF Blue treatment formulation.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eWall Connector (Input):\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 1 x Synergistic Research C07 Pure Copper plug (available in US and International Schuko variants).\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eComponent Connector (Output):\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Synergistic Research G07 Gold 15-Amp IEC plug (20-Amp variant available upon request).\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eStandard Length:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 1.5 meters \/ 5 feet (custom lengths available).\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eBuild Time:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 2 hours of precision point-to-point hand assembly.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eManufacturing Location:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Handcrafted in California, USA.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eIncluded Tuning Accessories:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 1 x Gold UEF Carbon Tuning Disc (for liquid warmth) and 1 x Purple UEF Carbon Tuning Disc (for open micro-detail and air).\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eElectrical Ratings:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 20 Amp (HC) \/ \u003c\/span\u003e\u003cspan class=\"iNqyIf\"\u003e16 Amp \/ 250 Volt.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\u003cspan class=\"iNqyIf\"\u003e\u003c\/span\u003e \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch5\u003eAwards \u0026amp; Reviews\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.enjoythemusic.com\/magazine\/equipment\/0120\/Synergistic_Research_Foundation_Cables_Review.htm\" rel=\"noopener\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/www.stevehuffphoto.com\/2026\/05\/19\/my-hifi-cable-reference-synergistic-research-foundation-xl\/\" rel=\"noopener\" target=\"_blank\"\u003eHi-Fi Huff\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/positive-feedback.com\/reviews\/hardware-reviews\/synergistic-research-foundation-xl\/\" rel=\"noopener\" target=\"_blank\"\u003ePositive Feedback\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/tmraudio.com\/blogs\/the-gearhead\/i-thought-i-knew-my-speakers-until-i-installed-the-synergistic-research-foundation-xl-loom?utm_source=klaviyo\u0026amp;utm_medium=email\u0026amp;utm_campaign=Product_Review_FoundationXL_20250514\u0026amp;utm_id=01KQWWF7T3HNCA3PMM4XXP40R4\u0026amp;utm_term=READ+FULL+REVIEW\u0026amp;_kx=WDdEeSosiCMHXtxSvq7Cjngyw9DcWQl49DSaJC_MQu1pCtsswB3cYZc2aowJoH93.WBMz2Y\" target=\"_blank\" rel=\"noopener\"\u003eThe Music Room\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.enjoythemusic.com\/magazine\/equipment\/0120\/Synergistic_Research_Foundation_Cables_Review.htm\" rel=\"noopener\" target=\"_blank\"\u003eEnjoy The Music\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/hometheaterhifi.com\/reviews\/audio-cables\/synergistic-research-cables-foundation-sx-full-set-review\/\" rel=\"noopener\" target=\"_blank\"\u003eSecrets of Home Theater and High Fidelity\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/hifiplus.com\/articles\/synergistic-research-foundation-series-cables\/\" rel=\"noopener\" target=\"_blank\"\u003ehi-fi+\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eAbout\u003c\/h5\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eSynergistic Research is an American high-end audio manufacturer founded in 1992 by Ted Denney in California, recognized for its handcrafted power conditioners, active cables, acoustic treatments, and UEF tuning accessories. The brand rejects the idea of passive connectivity, employing a holistic \"total system approach\" that relies on active electromagnetic biasing, 1,000,000-volt Quantum Tunneling material treatments, and advanced graphene integration to optimize the electrical and acoustic environment. Their premium product ecosystem—ranging from the single-outlet PowerCell ONE and multi-outlet PowerCell SX line to their widely utilized Purple and Master UEF fuses—is engineered to aggressively lower the system noise floor and maximize dynamic range without introducing traditional current-limiting restrictions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Synergistic Research","offers":[{"title":"US NEMA \/ Foundation XL \/ 5 Feet","offer_id":46187857707091,"sku":null,"price":119990.0,"currency_code":"INR","in_stock":false},{"title":"US NEMA \/ Foundation XL \/ 6 Feet","offer_id":46201748684883,"sku":null,"price":131990.0,"currency_code":"INR","in_stock":false},{"title":"US NEMA \/ Foundation XL HC [High Current] \/ 5 Feet","offer_id":46187857739859,"sku":null,"price":143990.0,"currency_code":"INR","in_stock":false},{"title":"US NEMA \/ Foundation XL HC [High Current] \/ 6 Feet","offer_id":46201748717651,"sku":null,"price":157990.0,"currency_code":"INR","in_stock":false},{"title":"EU Schuko \/ Foundation XL \/ 5 Feet","offer_id":46187857772627,"sku":null,"price":119990.0,"currency_code":"INR","in_stock":true},{"title":"EU Schuko \/ Foundation XL \/ 6 Feet","offer_id":46201748750419,"sku":null,"price":131990.0,"currency_code":"INR","in_stock":true},{"title":"EU Schuko \/ Foundation XL HC [High Current] \/ 5 Feet","offer_id":46187857805395,"sku":null,"price":143990.0,"currency_code":"INR","in_stock":true},{"title":"EU Schuko \/ Foundation XL HC [High Current] \/ 6 Feet","offer_id":46201748783187,"sku":null,"price":157990.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1867\/3055\/files\/image_2026-09-08_175420702.png?v=1788870266","url":"https:\/\/theaudio.co\/products\/synergistic-research-foundation-xl-ac-power-cable","provider":"The Audio Co.","version":"1.0","type":"link"}