Aries Cerat · Integrated Amplifier

Ianus Aperio

A single-stage, single-ended integrated amplifier featuring proprietary TriodeFet technology.

In the pursuit of absolute signal purity, audio engineering frequently seeks to minimise the number of active stages in a circuit. The Aries Cerat Ianus Aperio achieves the theoretical limit of this philosophy. It is a completely single-stage integrated amplifier, routing the signal from the source to the loudspeaker without the intervention of an input or driver stage. Sitting confidently within the Ianus series, the Aperio shares its foundational TriodeFet architecture with the flagship Essentia monoblocks. However, it deploys this technology in a unique single-ended topology. By utilising an active element that mirrors the transfer curve of a perfect triode but offers the current drive of solid-state components, it delivers 35 watts of pure Class A power without the thermal or mechanical limitations of traditional vacuum tubes. Sonically, the Aperio lives up to its name, which translates as the revealer. Because the circuit is astonishingly simple, it offers an unclouded window into the recording. It presents a densely textured midrange and a vast soundstage, backed by a visceral dynamic authority that firmly controls the loudspeaker. It delivers the supreme musicality of a benchmark single-ended design, completely free from electronic artifice or colouration.

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Key Features

Single-Stage Topology

The Aperio abandons input and driver stages completely. It features only one stage of amplification from the input terminals to the speaker outputs, ensuring unprecedented signal transparency.

TriodeFet Architecture

Proprietary active elements utilise internal vacuum tubes strictly to dictate the transfer curve. This delivers the exact electrical characteristics of a perfect triode alongside immense current gain.

Dual-Chassis Isolation

The massive power transformers and complex choke filters are housed in a dedicated external chassis. This completely isolates the sensitive single-stage circuit from stray magnetic fields and electromagnetic interference.

Transformer Volume Control

Signal attenuation is handled entirely by a multi-tap input transformer. This approach bypasses the dynamic compression and degradation introduced by standard resistive volume potentiometers.

Maintenance-Free Design

Because the internal tubes are used solely for curve creation rather than directly driving a load, they possess a lifespan exceeding 10,000 hours, removing the upkeep associated with traditional SET amplifiers.

Chapter 01

The Single-Stage Breakthrough

The Aperio is a revelation in amplifier simplicity. While the audio industry generally accepts multi-stage circuits as a necessary compromise, the Aperio eliminates input and driver stages completely. By routing the signal through a solitary amplification phase, it eradicates the phase shifts, cumulative distortion, and signal degradation inherent in complex topologies. The result is an elusive design goal finally realised in a commercial product.

Chapter 02

TriodeFet Technology

At the core of the Aperio lies Aries Cerat's proprietary TriodeFet technology. Instead of relying on traditional big-bottle output tubes to drive loudspeakers, the amplifier uses smaller internal vacuum tubes strictly to determine the transfer curve. The resulting active element behaves exactly like an ideal triode but possesses the massive current delivery and linearity of solid-state components. This architecture solves the historical limitations of single-ended designs. It provides the sonic purity of a Class A triode circuit while maintaining absolute control over complex loudspeaker loads, all whilst offering a practically maintenance-free lifespan.

Chapter 03

Sonic Signature

By imposing only a single stage between the source and the loudspeaker, the Aperio becomes astonishingly transparent. It provides a profound level of clarity, allowing the listener to hear the deepest layers of a recording without obstruction. It marries the holographic midrange, rich timbre, and organic flow of elite tube amplification with 35 watts of unshakeable authority. This is an amplifier that commands the room effortlessly. It exerts a physical grip on the lower frequencies while allowing the upper registers to decay naturally, resulting in a presentation that is both viscerally impactful and fundamentally true to the source.

Specifications

TechnologySingle stage, Single Ended, TriodeFet technology

Gain stagesSingle stage amplifier, from input to output posts

Power output35W @ 8 ohms

Tube complement2 x E280F / E282F / E810F / E180F

Volume control26 step TVC volume control technology

Inputs4 x RCA, 1 x XLR (pin 2 used), 1 x Direct (AC link)

Power bandwidthFull power at 5Hz to -3dB

Maximum gain21dB (tube dependent)

Noise floor-90dB ref 1V RMS

Dimensions (H × W × D)Main unit: 420 × 420 × 310 mm / PSU: 140 × 420 × 310 mm

WeightMain unit: 80 kg / PSU: 35 kg

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