We proudly present Ianus Essentia - the second amplifier in the new Ianus Series

“The Ianus Essentia monoblock amplifier uses TriodeFet technology but has features that make it unique in the already innovative Ianus range. In contrary to the bigger Geminae model, the Essentia is using the TriodeFet active element in a very different topology, as this is a Single Ended design. It is also performing sonically at the highest level, and even though it is the ‘smaller’ model still weighs in at 80 kilos per channel.”


The Design Concept

The Ianus Essentia amplifier is not only Single Ended, it is also a Single Stage! Incredibly there is no driver stage and no input stage! This extremely simple topology we feel is a breakthrough in amplifier design, and is an elusive design goal for many, including our lab. It is only possible to execute now as we are finally able to use an active element that has the needed specifications for the purpose: Extremely high linearity, high voltage gain, high current gain and very high input impedance.

The Essentia, as its name suggests, consists of only one TriodeFet stage, fed directly and used as a simple Single Ended amplifier and uses the “Essence” of the Geminea technology.

Variable gain input feature, using a very high quality Transformer Volume Control (TVC) system

System flexibility

Inputs include our proprietary AC link input, as well (as an option) a Transformer Volume Control (TVC) variable gain input, which is also found on the bigger brother, with 6 level selection. This allows the use of standard gain preamplifiers and high gain (Aries Cerat preamplifiers). Plus a negative feedback level control, with a defeat setting.

Combined with input level setting and negative feedback level setting, we also have a tube bias setting to further tailor the sound. This adds up to a chameleon like character to the Ianus Essentia with a high degree of flexibility in system matching, both sonically and input / output.


Triode or solid state?

The triode-like transfer curves of the TriodeFet means the Ianus Essentia sounds very much like the very best Single Ended tube amplifier. A superb midrange and treble, accurate timbre and the huge soundstage we expect from big bottle tube amplification.

In the case of the Ianus Essentia it is also able to deliver more current, and is essentially maintenance free as the internal tubes used for curve creation are rated at 10,000 hours lifespan. Its unique single stage nature means that it is as sonically transparent as it can get. The amplifier power delivery is 40W (8ohm) full class A.

The Essentia mirrors the strengths of a SOTA Single Ended tube amplifier, with superbly accurate timbre and a huge soundstage

Technical Specifications


Power Output (Class A operation):

40W @ 8ohm 70W @ 4ohm

Stable operation down to 1 ohm

Zero feedback design

Gain Stage:

Single Stage. Single Ended.


26db (26-22-18-14-10-6)db

(gain switch using TVC system)

Signal to Noise Ratio:

100db with reference 0db

Full power bandwidth:

5Hz - 60Khz

(upper range limited with oscillation prevention limiters)

Damping Factor:

User Switchable

Idle power consumption per channel:

100W depending on the bias setting


RCA X1, TVC X 1 , AC link X1, XLR (optional)


Maximum dimensions (excluding plinth):

420mm H x 400mm W x 310mm D

Weight unpacked:

80kg per monoblock