Eleven Audio 'Formula S' High Purity Headphone Amplifier- ABYSS Edition
Eleven Audio 'Formula S' High Purity Headphone Amplifier- ABYSS Edition
Eleven Audio 'Formula S' High Purity Headphone Amplifier- ABYSS Edition
Eleven Audio 'Formula S' High Purity Headphone Amplifier- ABYSS Edition

Eleven Audio 'Formula S' High Purity Headphone Amplifier- ABYSS Edition

Dual mono amplifier modules within the black anodized aluminum chassis of this Eleven Audio headphone amp delivers stunning speed and clarity, with hard hitting bass and drums and beautifully smooth tube-like decay to cymbals and string instruments. The Formula S amp is tuned for the highest resolution music and headphones. Impeccable balance, smooth and clear to the source, excellent bass definition, simply put the dedicated headphone amp every conneseur seeks. And it's stout size takes up less real estate on your desktop. This ABYSS Edition was tuned specifically for the ABYSS AB1266 headphone, and includes internal wiring by JPS Labs.

Note from Joe@ABYSS:The Formula S amplifier was specifically designed for the AB1266 and comes as a highly recommended mate to appreciate the headphones resolution and musical abilities. Given it's power and gain the Formula S will work it's magic on any full size high-performance headphone.

The sonic signature of this amp can be best described as having a highly refined, detailed yet full sound with plenty of harmonic richness approaching that of a high performance tube amp without the heat. As amplifiers go, in my 30+ years in audio it's sonic signature is what everyone seeks as they spend too many years on the merry-go-round.


    • Full Class A output for smooth powerful sound
    • High quality design and components throughout
    • All aluminum construction with durable beaded finish and permanent laser markings
    • Provides three of the most popular output connections for high performance headphones, 1/4" (6.3 mm), 4 pin XLR, and dual 3 pin XLR
    • High quality ALPS volume control goes from 'zero to Eleven'
    • Fully regulated power supplies
    • Output protection and turn-on/turn-off delay keeps your high end headphone investment safe.
    • Single set of inputs wired direct to the volume control with JPS Labs Alumiloy® wire, no switches or extra circuit paths. Choose XLR or RCA inputs.
    • Designed with the ABYSS AB-1266 planar headphone for high resolution playback and ultimate bass control with the most demanding headphones
    • 115/230 VAC AC input selector with standard grounded IEC AC cord socket (Standard IEC C13 AC cable not included, JPS Labs PAC Lite recommended,JPS Labs Kaptovator Lite AC best)
    • Circular connector for connection to Powerman external power supply upgrade.


  • Input Z: 10 Kohms
  • Output: 6W @ 16 ohms
  • Input Sensitivity: 1000 mV
  • Gain: Selectable 10 dB (Low) / 16 dB (High)
  • THD: 0.0006% @ 300 mW, distortion character compensated for high-end music playback
  • Noise floor: -110 dBV
  • Dimensions: 24 cm x 29.3 cm x 13 cm (9.5"W x 11.5"D x 5.1"H)
  • Weight: 4.8 kg (10.5 lbs) (amp only)
  • 100-115VAC/230 VAC, 50/60 Hz, CE certified

HIGHLY RECOMMENDED for our AB1266 headphone

Recommended cables JPS Labs Superconductor V or best Superconductor 4 interconnects, JPS Labs PAC Lite or best Kaptovator Lite AC power.

    Regular price$3,899.00
    Shipping included in price.
    Input Connectors
    • Free worldwide shipping
    • In stock, ready to ship
    • Inventory on the way