Eleven XI Audio Formula S Abyss Headphone Amplifier with Powerman Power Supply
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Product Highlights
"The Eleven XI Audio Formula S is a high-purity, solid-state Class A headphone amplifier engineered for demanding planar magnetic headphones like the Abyss AB-1266 and HIFIMAN Susvara. Housed in a black-anodized aluminum chassis, this dual-mono, pure-analog design features JPS Labs internal wiring and offers 4-pin XLR balanced, dual 3-pin XLR, and 6.35mm outputs. The optional Powerman external power supply replaces the internal source via a dedicated umbilical cable, utilizing a large toroidal transformer and discrete regulation to ensure a blacker background and enhanced micro-detail. This pairing is widely regarded as an "endgame" setup that maximizes transparency and soundstage depth.
Reviews emphasize a refined signature with tube-like harmonic richness and exceptional bass speed. The Powerman upgrade further lowers the noise floor while adding dynamic authority and weight to the performance. This system provides a resolving, neutral presentation for the most discerning listeners."
| Brand | Eleven XI Audio |
|---|---|
| Type | Headphone Amplifiers |
| MSRP | $6,598.00 |
| Serial # | 531709 |
| Cosmetic Rating | |
| Functional Notes | |
| Age | 5 years |
| Owners | 1 |
| Service History | None |
