Skip to content

Your Cart (0)

View cart

Your cart is empty

Continue shopping

Synergistic Research Foundation XL USB Cable

See more from Synergistic Research
Original price $890.00 (22% Off Est. Retail)
Original price From $695.00
Original price $890.00 (22% Off Est. Retail)
Current price $695.00
From $695.00
Current price $695.00

FREE shipping to contiguous US

FREE store pickup at TMR Erie, CO.

Earn 695 TMR Rewards points for this purchase.
Not a member? Join today >

Length: 1M
Terminations: USB A - USB B
FREE
Shipping

FREE
Shipping

Financing
Available

Financing
Available

Trade Up
& Save

Trade Up
& Save

Full
Warranty

Full
Warranty

60-Day
Returns

60-Day
Returns

Lifetime Tech 
Support

Lifetime Tech
Support

Free Shipping & Safe Delivery Guaranteed

All new products ship free within the contiguous United States.

Every order is backed by our TMR Safe Pack & Ship Guarantee. We carefully double-box every shipment to protect the manufacturer's packaging, and larger items are professionally packed and palletized when required for safe, upright delivery.

Every shipment is fully insured, with signature confirmation required on orders over $750.

In the rare event of loss or damage, we fully protect your purchase and handle the resolution for you.

We DO NOT offer international shipping.

60-Day Risk-Free Returns

We want you to feel confident investing in new HiFi. That’s why all new products come with 60-day risk-free returns, giving you time to listen, evaluate, and make sure it’s the right fit for your system.

See our full return policy.

Full Manufacturer Warranty

Every new product is backed by its full manufacturer warranty, giving you long-term peace of mind and direct support from the brand—on top of TMR’s expert guidance and customer care.

About Synergistic Research Foundation XL USB Cable

Synergistic Research Foundation XL USB Cable Key Features: 

  • Doubled 6N Pure Silver AirStrings – Delivers faster, more resolving performance with enhanced texture, dynamics, and smooth, fatigue-free listening.
  • SRX XL UEF Matrix Shielding with Graphene – Reduces noise floor while preserving transparency, allowing musical details to emerge with clarity and realism.
  • SRX XL High Voltage Conditioning – Frees electron flow at the molecular level, improving tonal accuracy, dimensionality, and overall musical openness.
  • Carbon Fiber UEF Tuning Discs – Enable system-specific tuning for optimized harmonic texture, soundstage depth, and lifelike reproduction.
  • Re-engineered USB Cable Geometry – Applies advanced SRX XL technologies to USB signals, providing a substantial upgrade over the Foundation SX series.

Product Description: 

Building on insights from the flagship SRX XL cable line, the new Foundation XL USB cables deliver a clear performance upgrade over the Foundation SX series while remaining affordably priced. Though an evolution of Foundation SX, the Foundation XL USB has been re-engineered from the ground up, incorporating the same advancements developed for SRX XL.

Shielding benefits from the SRX XL UEF compound, and every cable undergoes the same SRX XL High Voltage Conditioning process used on the flagship series.

The result is improved dynamics, a more natural timbre, and a lowered noise floor, allowing musical details to emerge with greater smoothness and realism than the previous generation.

UEF Matrix Shield with Graphene SRX XL Matrix Shielding

In creating the flagship SRX XL series, Synergistic Research developed a new UEF compound that advances its Matrix Shielding technology, reducing the noise floor even further while minimizing the signal constraints typically associated with shielding. This state-of-the-art SRX XL Matrix Shielding is now applied to the Foundation XL line, delivering a substantial performance upgrade over the previous Foundation SX. To further refine musicality, Carbon Fiber UEF Tuning Discs—engineered specifically for both Foundation SX and Foundation XL—enhance noise cancellation, preventing high frequencies from sounding harsh or fatiguing.

Enhanced Cable Geometries—6N Pure Silver Airstrings, Multiplied

While voicing the Foundation XL, Synergistic Research discovered that doubling the 99.9995% pure silver Air Strings produced cables that are quicker and more resolving, with greater texture and body. This refinement enhances dynamics and transient response while preserving a smooth, fatigue-free presentation.

Quantum Tunneling—SRX XL High Voltage Conditioning

The SRX XL High Voltage Conditioning process represents Synergistic Research’s most advanced treatment, applying 1,000,000 volts of electricity at carefully chosen frequencies and pulse modulations over extended durations. This creates pathways within the conductor material and contact points at the molecular level, enabling freer electron flow. Building on the original SRX process, the XL version introduces longer duration sweeping frequency plots and enhancements to the Tesla Coil, resulting in an even more open and accurate sound. Foundation XL cables benefit from this same conditioning method, a key factor in their substantial performance gains and voicing that approaches the flagship SRX XL series.

Included Carbon Tuning Discs—Tune to Perfection

Foundation XL interconnects, speaker cables, and power cables include Carbon Tuning Discs derived from the Atmosphere SX loom where they help define the series’ signature sound. Each disc incorporates patented UEF technology and is treated with a specialized UEF compound that interacts with EM fields to elevate performance. Constructed from conductive carbon fiber, the discs intensify this interaction, further improving system transparency and refinement. Gold Carbon Tuning Discs enrich harmonic texture while adding holographic realism, while Purple Carbon Tuning Discs extend clarity and soundstage openness even further for heightened detail and dimensionality.

Specifications: 

Conductors

4 each Copper Matrix

Conductor Material

23 gauge solid copper

Dielectric

Solid Polyethylene

Shielding

Dual Silver Mylar / Braid - Quantum Tunneled Ground Plane Technology

Signal Direction

Listened for signal direction before build

SRX XL Matrix Shielding

UEF coating with Graphene applied to connectors for lower noise floor and purer signal

SRX XL Quantum Tunneling

Cable treated with 1,000,000 volts at specific frequencies to improve electron flow and low-level information transfer

Secondary UEF Treatment

Blue Treatment originally developed for SR Blue Fuses

Hand Build Time

1 hour

Burn-in

5 day, 2-step process

Manufacturing

Hand crafted in California factory

Explore More Synergistic Research

×

Please wait...

Make An Offer

Descriptive image text
Descriptive image text