Synergistic Research Foundation XL Headphone Cable

Synergistic Research Foundation XL Headphone Cable

Foundation XL Headphone Cable applies the learnings from Synergistic Research's flagship SRX XL cable line to headphone listening, where drivers sit millimeters from your ears and a lower noise floor is immediately audible as micro-dynamics, ambient detail, and spatial cues that lesser cables obscure. It uses 8x doubled 6N pure silver Air Strings for immediacy and presence on vocals, acoustic instruments, and complex passages, SRX XL Matrix Shielding with Graphene, and SRX XL High Voltage Conditioning, the same process developed for the flagship SRX XL cable line. Included Gold and Purple Carbon Tuning Discs let you further refine the cable's voicing. Available 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

• 8x Silver Air Strings, 99.9999% pure monocrystalline silver conductor
• Air sealed / Teflon dielectric
• Silver Braid shield, Quantum Tunneled SRX XL UEF Matrix Shield with Graphene
• SRX XL High Voltage Conditioning treatment
• Included Gold and Purple Carbon Fiber UEF Tuning Discs
• 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:

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

Headphone-side connectors:

• 2-pin Lemo (Focal Utopia)
• 3-pin Lemo
• 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 XL 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 XL 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.