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Overview

Synergistic Research Foundation XL USB Cable


The Synergistic Research Foundation XL USB cable brings technologies developed for the flagship SRX XL series to high-performance digital audio systems. Designed to connect music servers, streaming transports and computers to compatible USB DACs, Foundation XL combines solid-copper conductors, advanced graphene-based shielding and Synergistic Research's proprietary high-voltage conditioning.

Building on the Foundation SX series, Foundation XL incorporates SRX XL UEF Matrix Shielding and the same extended high-voltage conditioning process used in the company's reference cables. According to Synergistic Research, these improvements are intended to lower the perceived noise floor, improve dynamics and deliver more natural instrumental timbre.

Handcrafted in California, Foundation XL USB features four 23 AWG solid-copper conductors, solid polyethylene insulation and dual silver Mylar/braided shielding. Its construction is designed for demanding digital audio applications where careful signal transmission and electrical noise management are priorities.

 

Key Features

  • Four 23 AWG solid-copper conductors: Copper Matrix construction designed for USB digital audio transmission.

  • SRX XL Matrix Shielding: Graphene-enhanced UEF compound applied directly to the connectors for additional noise management.

  • Dual-layer shielding: Silver Mylar and braided shielding incorporating Synergistic Research's Quantum Tunneled Ground Plane technology.

  • SRX XL High Voltage Conditioning: The same proprietary conditioning process used for the flagship SRX XL cable series.

  • UEF Blue Treatment: Additional factory treatment originally developed for Synergistic Research's SR Blue Fuses.

  • Directional evaluation: Conductors are evaluated for signal direction before assembly.

  • Five-day factory burn-in: Two-stage conditioning process completed before shipment.

  • Handcrafted in California: Individually assembled at Synergistic Research's manufacturing facility.

     

Technical Specifications

Specification

Details

Manufacturer

Synergistic Research

Series

Foundation XL

Cable type

Audiophile USB digital cable

Conductors

4 Copper Matrix conductors

Conductor material

Solid copper

Conductor gauge

23 AWG

Dielectric

Solid polyethylene

Shielding

Dual silver Mylar and braided shield

Ground plane

Quantum Tunneled Ground Plane Technology

Additional shielding

SRX XL UEF Matrix Shielding with graphene

Connector treatment

Graphene-enhanced UEF compound

Conditioning

SRX XL High Voltage Conditioning

Secondary treatment

UEF Blue

Factory burn-in

Five-day, two-stage process

Available lengths

1m, 2m, 3m and 5m

Manufacturing

Handcrafted in California, USA

SRX XL Graphene Matrix Shielding

Foundation XL USB incorporates the advanced shielding technology developed for Synergistic Research's flagship SRX XL cables. Its proprietary UEF compound contains graphene and is applied directly to the cable's connectors, complementing the dual silver Mylar and braided shielding.

The manufacturer developed this approach to manage electromagnetic interference while minimizing the influence of shielding on signal transmission. Combined with the cable's Copper Matrix conductors and solid polyethylene dielectric, the construction is intended to provide a carefully controlled electrical environment for USB audio connections.

Advanced High Voltage Conditioning

Every Foundation XL USB cable undergoes Synergistic Research's SRX XL High Voltage Conditioning process. This proprietary treatment uses high-voltage pulses, specific frequencies and extended-duration frequency sweeps.

Following assembly, the cable also receives a secondary UEF Blue treatment and a five-day, two-stage factory burn-in.

Synergistic Research attributes improvements in perceived clarity, dynamics and tonal realism to these technologies. Audible differences may vary depending on the connected components and overall system configuration.

 

High-Resolution Digital Audio Integration

Foundation XL USB is intended for high-performance digital playback systems using a compatible USB audio connection. It can connect music servers, dedicated streaming transports and computer-based audio sources to USB-equipped digital-to-analog converters.

For systems incorporating other Foundation XL products, the USB cable complements the series' analog interconnects, speaker cables, Ethernet cables and power cables, providing a consistent cable range throughout the audio system.

Experience Synergistic Research at The Grid HiFi

The Grid HiFi in Houston, Texas, specializes in high-performance two-channel audio, reference digital playback and premium audio cables. Our team can help integrate Synergistic Research Foundation XL USB into a complete streaming system, pairing it with compatible music servers, digital-to-analog converters and high-end audio electronics.

Whether you're upgrading an existing digital source or building a complete Foundation XL cable system, The Grid provides personalized equipment selection and system integration.

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We're at 6362 Alder Drive, Houston, Texas. The showroom lets you hear and compare reference-level systems in person before making any decisions. If you're considering a larger purchase or installation, it's well worth the visit.

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Yes. Special financing is available through the BrandSource Credit Card for qualifying purchases, allowing you to spread payments over time with no annual fee. Promotional rebate savings are also available periodically. See the financing page for full details.

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Yes — installation is central to what we do. We design and install whole-home audio and video, home theaters, media rooms, outdoor audio, lighting and motorised shades, and full smart home automation.

Do you provide support after installation?

Yes. We provide ongoing service and support to ensure systems continue performing as intended — not just on installation day, but over the long term.