Eleven Audio XIAUDIO Formula S Headphone Amplifier with upgrade power supply (FLOOR SAMPLE SALE)

$6,598.00 $4,299.00

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 with Powerman power supply - a fantastic outboard power supply that will do wonders for lowering your noise floor and increasing dynamics! A powerful reference-level solid-state headphone amplifier! This was developed... Read more

Style: with Powerman upgrade outboard power supply

  • with Powerman upgrade outboard power supply
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 with Powerman power supply - a fantastic outboard power supply that will do wonders for lowering your noise floor and increasing dynamics!

A powerful reference-level solid-state headphone amplifier! This was developed to power Abyss headphones, which are, if you ask us, perhaps the best headphones ever made. And thus, if they are good enough for the Abyss's, they are good enough for any high end headphones! With a lot of pep under the hood, they can effectively drive even the most power-hungry cans. Boost their dynamics and lower the sound stage with the outboard power supply upgrade!

A newcomer shows the world the true sound of music. Solid state dual mono amplifiers deliver stunning speed and clarity, with hard hitting bass and drums and beautifully smooth tube-like decay to cymbals and string instruments, on up beyond perception, 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 connoisseur seeks. And it's stout size takes up less real estate on your desktop.

Note from Joe at ABYSS: The Formula S amplifier was specifically designed for the ABYSS AB-1266 Phi CC 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 ABYSS AB-1266 headphone

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

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