Heros MK2 | Thrax Audio

CLASS A HYBRID - tube/fet AMPLIFIER

HEROS MK2S

Heros is a very unusual hybrid amplifier marrying old concepts with the latest technology.

Single differential DC-coupled FET/Tube stage for unparalleled performance.
Low-impedance push-pull transformer for double the efficiency of traditional Class A designs.
Fully differential architecture with input and output transformers for noise isolation.
High-voltage Silicon Carbide diodes and filter choke for a noise-free power supply.
Proprietary DC gain cell based on the 6N6P audiophile tube.
Silver-wire permalloy input transformer and custom toroidal transformers.
Compact 100-watt Class A design with chassis-as-heat-sink for efficient thermal management.
Vibration-free structure for pristine sound quality.

Heros: Redefining Amplifier Excellence

The Heros amplifier is a masterpiece of engineering, designed to deliver a listening experience unlike any other. It combines cutting-edge technology with audiophile-grade components to create a sound that is both powerful and refined. Whether you're a discerning music lover or a professional seeking uncompromising performance, Heros sets a new standard in amplification.

Innovative Design, Unmatched Performance

At the heart of Heros lies a revolutionary single differential DC-coupled FET/Tube stage, functioning as a single "super tube." This unique design, loaded by a low-impedance push-pull transformer, achieves nearly double the efficiency of traditional Solid State Class A amplifiers. The result? A seamless blend of tube warmth and solid-state precision.

The output transformer

Is a key component of Heros' performance. It blocks DC on the output, isolates EMI/RFI, scales down output voltage (reducing residual noise), and cancels power supply noise through its differential operation. This ensures a clean, noise-free signal path, allowing every detail of your music to shine through.

Fully Differential Architecture for Purity

To guarantee a fully differential architecture, Heros splits the phase with an input transformer and recombines it with the push-pull output transformer. This innovative approach isolates the gain cell between the two transformers, making Heros immune to external environmental influences. Your music remains pure, untouched by interference.

Power Supply: Silence and Stability

The power supply is engineered for absolute silence. High-voltage Silicon Carbide diodes and a filter choke work together to eliminate switching noise, ensuring that nothing distracts from your listening experience. The result is an amplifier free of grain, fizziness, or harsh intermodulation—just pure, transparent sound with exceptional tonal density.

Audiophile-Grade Components

Heros is built with the finest components to match its groundbreaking design. The proprietary DC gain cell is based on the revered 6N6P tube, known for its audiophile-grade performance. Complementing this is a silver-wire permalloy input transformer and custom, high-grade toroidal output and power transformers. Every detail is crafted to deliver the ultimate in sound quality.

Efficient Thermal Management

Operating entirely in Class A, Heros generates significant heat, which is efficiently managed by its chassis. Designed to double as a heat sink, the chassis ensures optimal thermal performance while maintaining a compact form factor. Despite its power, Heros remains the most compact 100-watt Class A solid-state amplifier available.

The chassis is more than just a heat sink—it’s a vibration-free platform for the amplifier’s components. This meticulous design ensures that every note is delivered with precision and clarity.

A New Voice for Your Speakers

While Heros shares its chassis design with our Teres hybrid amplifier, the similarities end there. Heros is in a league of its own, capable of driving any speaker with ease and transforming its sound. Whether you’re listening to delicate acoustic passages or powerful orchestral crescendos, Heros gives your speakers a new voice, revealing details and emotions you’ve never heard before.

Experience the Difference

Heros is more than an amplifier—it’s a gateway to a new level of musical enjoyment. Its combination of innovative technology, premium components, and meticulous engineering makes it the ultimate choice for those who demand the best.

Discover the Heros amplifier and experience sound as it was meant to be heard.

Available Finishes

BLACK ANODIZED ALUMINUM

SILVER ANODIZED ALUMINUM

Product History

First introduced in 2012 as the market demanded a no glass tube power amplifier the Heros was designed as a direct alternative to the emblematic Spartacus. Same form factor and aesthetic values. It featured a 5687 input tube driving a cascoded FET follower via capacitive coupling with stacked power supplies.
Essentially an exemplary differential tube amplifier with solid state pentodes.

While working on the move to the Teres size chassis our new DC coupled circuit was developed and implemented taking the 2020 Heros Mk2 to a completely new level. Silver input transformer added the "S" in the name.
The original Heros still holds its ground and should be a tasty grab if it ever reaches the second hand market.