Description

TRAFOMATIC EOS DUAL MONO POWER AMPLIFIER

Trafomatic EOS DUAL MONO POWER AMPLIFIER CLASS AB

EOS KT120 TUBE 100 WATTS

The Trafomatic EOS Dual Mono Power Amplifier is engineered for listeners who want commanding power without sacrificing the musical character that only tubes can deliver. Producing 100 watts per channel in a carefully implemented Class AB push-pull design, the EOS is capable of driving a wide range of loudspeakers — including models with lower sensitivity — while maintaining refinement and tonal balance.

At the heart of the EOS are four Tung-Sol KT120 output tubes, chosen for their ability to deliver strong current, impressive headroom, and a full-bodied sonic presentation. This amplifier is designed strictly as a power amplifier, meaning it requires a dedicated preamplifier. That approach allows greater system flexibility and opens the door to building a highly personalized high-end audio setup.

One of the defining aspects of the EOS is its true dual mono construction. Each channel operates independently with separated filtering, helping preserve stereo separation and improve soundstage accuracy. The external power supply unit further enhances performance by isolating the transformer and filtering stages from the main amplification circuit. This results in lower noise, improved stability, and a cleaner background.

Trafomatic has carefully tuned the negative feedback implementation to achieve a natural, engaging sound signature. With approximately -8dB of feedback and the use of cathode feedback, the EOS maintains clarity and control while preserving harmonic richness. The amplifier delivers well-defined bass, excellent dynamic response, and a midrange that feels open and expressive. High frequencies extend smoothly without harshness, allowing long listening sessions without fatigue. Internally, the EOS uses a substantial 800VA toroidal transformer housed in its own enclosure, along with a C-L-C filtering topology separated per channel. Output transformers are built on a Double-C core configuration, supporting wide bandwidth and stable performance across the frequency range. High-quality capacitors are used throughout the signal path to maintain speed and precision.

Visually, the EOS reflects Trafomatic’s modern design philosophy. The amplifier combines clean industrial lines with an acrylic front tube protection panel, allowing the glow of the tubes to become part of the listening atmosphere while offering practical protection. Together with the separate power supply unit, it presents a bold yet elegant presence in any serious listening room. The EOS is an excellent foundation for those seeking a powerful yet musically engaging tube power amplifier capable of anchoring a reference-level system.

Highlights

• 100 watts per channel tube power amplifier

• True dual mono construction

• Class AB push-pull topology

• KT120 Tung-Sol output tubes

• Separate external power supply unit

• 800VA toroidal transformer

• Double-C core output transformers

• RCA and XLR inputs

• 4Ω and 8Ω speaker outputs

• Switchable 115V / 230V operation

Features

High-Power KT120 Output Stage
Four KT120 Tung-Sol tubes provide strong current delivery and excellent headroom, allowing the amplifier to control demanding speakers with authority while maintaining tonal richness.

True Dual Mono Architecture
Each channel operates independently with separated filtering, improving channel separation, imaging precision, and overall stereo stability.

External Power Supply Design
A dedicated power supply unit with an 800VA toroidal transformer reduces internal interference and enhances noise performance.

Optimized Negative Feedback
Carefully tuned feedback implementation balances clarity and musicality, preserving natural harmonic texture while maintaining control.

Double-C Core Output Transformers
Custom-designed transformers contribute to wide bandwidth performance and low distortion across the frequency spectrum.

Cathode Feedback Implementation
Chosen for its musical character, this topology supports coherence and smooth tonal presentation.

Flexible Connectivity
Both RCA and XLR inputs allow easy integration into a wide range of high-end systems.

Modern Industrial Styling
Clean lines and an acrylic tube protection panel combine aesthetic refinement with functional design.

Specifications

Output Power: 2 x 100W
Class of Operation: Push-Pull, Class AB
Tube Complement:

• 4 x KT120 Tung-Sol

• 2 x ECC99

• 2 x 5687

Inputs: RCA and XLR
Speaker Outputs: 4Ω and 8Ω
Input Sensitivity: 1 Vrms
Input Impedance: 100 kΩ

Total Harmonic Distortion (THD):

• 0.03% at 1W / 1kHz

• 2% at 100W / 1kHz

Frequency Response: 10Hz (-1dB) – 100kHz (-1dB)
Signal-to-Noise Ratio: 82dB

Power Consumption: 500VA
Input Voltage: 230V / 50Hz – 115V / 60Hz (switchable)

Amplifier Dimensions: 450 x 350 x 230 mm
Power Supply Dimensions: 150 x 300 x 200 mm

Weight:

• Amplifier: 25 kg

• Power Supply: 11 kg

Source: https://www.trafomaticaudio.com/products/eos-power-amp/?portfolioCats=12

Reviews: https://www.trafomaticaudio.com/wp-content/uploads/2018/08/monoandstereo.com-Trafomatic-Audio-EOS-power-amplifier-review-and-test.pdf