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High Fidelity Audio

Ianus Geminae

Aries Cerat · Power Amplifiers

Ianus Geminae

The dual-chassis single-stage TriodeFet monoblock for uncompromising musical performance.

True reference amplification requires both supreme signal purity and the sheer electrical capacity to drive complex loads without compromise. The Ianus Geminae achieves this by separating the signal processing and power supply into two stacked, heavy-duty chassis per channel. This isolation ensures that the delicate single-stage amplification circuit is shielded from the massive energy demands of the power stage. At the heart of the Geminae lies the TriodeFet, a proprietary technology that allows the amplifier to mirror the transfer curves of a perfect vacuum tube. As a true single-stage design, the input signal is processed through one sole amplification stage before reaching the output, entirely removing the phase shifts and distortions inherent to multi-stage topologies. This minimalist architecture results in an extraordinary level of sonic transparency, allowing the smallest details of a recording to emerge with crystalline clarity. Designed for ultimate versatility, the Geminae features a high-quality Transformer Volume Control (TVC) for selectable gain, alongside adjustable negative feedback and tube bias settings. This sophisticated control suite enables the amplifier to integrate perfectly into any high-end system, providing a tailored listening experience that remains faithful to the original source. Built for longevity, the internal components are rated for a 10,000-hour lifespan, ensuring consistent reference performance for years to come.

Key Features

01

Dual-Chassis Isolation

Separates the sensitive signal-stage circuitry from the high-capacity power supply chassis to eliminate electromagnetic interference.

02

TriodeFet Technology

Provides the tonal characteristics of single-ended tubes with the superior linearity and current drive of high-end solid-state components.

03

Single-Stage Topology

A minimalist, zero-feedback design that removes input and driver stages to ensure the highest possible level of signal purity.

04

Transformer Volume Control

Integrated high-quality TVC system allows for selectable gain levels to ensure perfect impedance matching with any preamplifier.

05

Maintenance-Free Operation

Internal TriodeFet components are rated for 10,000 hours of continuous use, providing long-term reliability without the need for constant maintenance.

Design & Philosophy

Chapter 01

Design & Philosophy

The Geminae was engineered to prove that massive power need not come at the expense of musical intimacy. By developing the TriodeFet active element, Aries Cerat has realised an amplifier that operates as a single stage, avoiding the signal degradation associated with conventional multi-stage designs. It is the result of an exhaustive engineering process aimed at creating a reference-grade monoblock that sounds as organic as the finest vacuum tube amplifiers while maintaining the stability and grip of the most advanced solid-state designs.
Build & Materials

Chapter 02

Build & Materials

Each monoblock weighs 135kg and is constructed to the highest standards of structural and electrical integrity. The amplifier is designed to be sonically invisible, using bespoke magnetics, robust power supply rails, and a sophisticated gain-switching suite that operates entirely in the analogue domain. The construction process focuses on achieving absolute rigidity and isolation, ensuring the delicate signal path is protected from mechanical resonance.
Sonic Signature

Chapter 03

Sonic Signature

Listening to the Geminae reveals a rare combination of holographic intimacy and monumental authority. It possesses the superb midrange fluidity and delicate treble extension characteristic of the best SET designs, yet it exhibits a control over the frequency extremes that brings a physical, visceral presence to the performance. It excels at low-level ambiance and micro-dynamics, ensuring that the listener is connected to the emotional core of the recording, regardless of the complexity of the source material.

Specifications

Power Output130W at 8ohm, 260W at 4ohm
Frequency response10Hz - 60kHz
Gain32dB (28-24-20-16-12db (gain switch using TVC system)
Signal to Noise Ratio100dB (reference 0dB)
ImpedanceStable operation down to 1 ohm
Damping Factor200
Idle Power Consumption380-600W (depending on bias setting)
InputsRCA, TVC, AC Link, XLR
Dimensions (H × W × D)720mm H x 400mm W x 610mm D
Weight165kg per monoblock