Synergistic Research Foundation SX Headphone Cable

Synergistic Research Foundation SX Headphone Cable

Foundation SX Headphone Cable is hand-made with 4x Air String geometries of 99.9999% pure silver conductors in an air dielectric for high resolution without harshness or listening fatigue. It uses a UEF Matrix Shield with a UEF Compound first developed for Synergistic Research's flagship SRX cable loom for a dramatically lower noise floor, and is treated with the Long Duration High Voltage Conditioning Process engineered for SRX cables. Included Gold and Purple Carbon Tuning Discs let you voice the cable to your headphone rig. Available in Black or White, with a wide range of source and headphone-side connector options. As an authorized Synergistic Research dealer in Toronto, Canada, Vinyl Sound can help you match this cable to your specific headphone.

Key Features

• 4x Silver Air Strings, 99.9999% pure monocrystalline silver conductor
• Air (sealed) dielectric
• Silver Braid shield, Quantum Tunneled, UEF Matrix Shield with Graphene
• SRX-derived Long Duration High Voltage Conditioning treatment
• Included Gold and Purple Carbon Fiber UEF Tuning Discs
• Available in Black or White
• Source connectors: 4-pin XLR or 3.5mm (with included 6.35mm/1/4" adapter); dual 3-pin XLR available (+$100)
• Wide range of headphone-side connector options — see below

Connector Options

Source connectors:

• Neutrik 4-pin XLR
• 3.5mm (includes 6.35mm/1/4" adapter)
• Dual 3-pin XLR (+$100)

Headphone-side connectors:

• 2-pin Lemo
• 3-pin Lemo (Focal Utopia)
• MMCX (Pioneer SR-Master1; Shure SRH1540, SRH1840)
• Sennheiser Push-Pull (HD820, HD800S, HD800)
• Sennheiser 2-pin (HD650, HD600, HDXX)
• Mr. Speakers 4-pin Hirose (Aeon, Ether 2, Ether 2 Closed, Flow, Flow Closed)
• 4-pin Mini XLR (Audeze LCD4, 3, 2, X, XC; Meze Empyrean; ZMF Atticus, ZMF Eikon)
• 3-pin Mini XLR
• 2.5mm Mono (Hifiman older styles)
• 3.5mm Mono
• 3.5mm Stereo (Hifiman Ananda, Susvara, HE1000, HE400i, HE500, HE6, HE650)
• 8-contact
• SMC
• TRRS (2.5mm and 3.5mm)

Additional connections may be available upon request — always confirm your headphone's connector with Vinyl Sound before ordering.

Technical Specifications

Frequently Asked Questions

Will this cable fit my headphones?
Foundation SX Headphone Cable supports most popular headphone connectors, including Focal, Sennheiser, Audeze, Hifiman, Shure, Meze, and ZMF. Confirm your exact connector with Vinyl Sound before ordering, as some models use non-standard terminations.

Can I use balanced source connections?
Yes. Foundation SX Headphone Cable is available with a 4-pin XLR or dual 3-pin XLR source connector for balanced headphone amps, or 3.5mm single-ended with an included 6.35mm adapter.