Deze volledig in eigen beheer ontwikkelde producten uit Sofia, Bulgarije stralen kwaliteit uit met een ongekende muzikaliteit. Deze apparatuur richt zich naar klanten voor die enkel het beste goed genoeg is.

THRAX Audio haalt zijn inspiratie bij de grootmeesters van de Japanse huizenversterkers. Door innovatie en hun streven naar eenvoud en muzikale magie met technologische spitstechnologie brengen deze pareltjes u dichter bij de muziek.

Op afspraak kan u met deze juweeltjes kennis maken…. een onvergetelijke gebeurtenis.

It is all out there, you just have to put it together

Thrax Philosphy


Thrax Heros




Heros is a very unusual hybrid transformer loaded amplifier marrying old concepts with latest technology.
The numerous benefits from using an output transformer are usually ignored mostly due to cost reasons. Yet when done correctly the result speaks for itself.

Based on a push pull output stage but modified with our design concepts and experience it features a tube input stage providing the necessary voltage amplification. Followed by transformer loaded cascoded JFET/MOSFET output stage instead of the usual tube taking care of current gain much better.

Almost double the efficiency of a normal Solid State Class A design, no DC on output and many other benefits are taken advantage of in our implementation.

A fully differential architecture using an input phase splitting transformer and summing back at the push pull output transformer. This solution completely floats the inside of the amplifier isolating it from any external influences.

The design being fully differential is immune to power supply noise.

The power supply for the output stage uses a new breed of rectifier diodes made of a new material called Silicon Carbide. They have no reverse current and switching loses.

When properly applied the rectifier produces no EMI/RFI in the chassis. The result is an amplifier free of grain and fizziness, giving new meaning to transparency and tone.

We use the well-known 5687WA audiophile tube and the highest grade audio transformers. Operating all devices in class ‘A’ produces a fair amount of heat, so the whole chassis is a heat sink. It is the most compact 100-watt class A solid state amplifier available

The chassis is designed to cope with the heat produced by the components and provide a vibration free structure to house the components. All the electronics are enclosed in separate compartments to stop interference between components.

Blending this with stylish aesthetics produced a beautiful sculpture – To be known as Heros.



  • Tube amplifier architecture with simplest signal path
  • Transformer coupled input and output
  • JFET/MOSFET cascode output devices
  • Silicon Carbide diodes in power supply
  • Microprocessor control
  • Selectable gain
  • Selectable speaker impedance
  • Audiophile 5687wa tube used
  • Fully balanced differential operation
  • Both RCA and XLR inputs
  • Compact chassis built like a tank
  • 100W Class A power output
Meer info
  • Officiële webpagina klik hier
  • Prijs: vanaf € 25.200
  • Heeft u interesse in een THRAX versterker? U bent na afspraak welkom in onze showroom om de producten te komen beluisteren


Thrax Teres




Teres is based on classic tube amplifier topology.
Single ended tube input stage loaded with a phase splitting transformer controlling 2 separate single ended amplifiers out of phase for output.
Tube clarity and tone with might and power.
Unusual but true…

The C3g tube handles all the voltage gain needed. It uses a new generation or our choke rectified shunt regulated power supply providing a stable noise free operating point.

The output stages power JFET cascodes form a bridge that when unbalanced by the input signal via the 2 transformer windings restores balance by adjusting their current conduction trough the load. The 2 output stages actually enclose the load in their control loops and try to correct each-others errors reducing the distortion to negligible amounts. Leaving only the “character” of the input stage.

To reduce the amount of heat generated the amplifier is biased so only the first few watts are in true class A. Music has a crest factor of 10 on average. This means that most of the time we listen with 1/10th of the peak levels. For most users this translates to under 5W. Peaks could reach over 100watts during playback, but only for few milliseconds. For those peaks the amplifier switches to class B using only one leg of the output stage capable to deliver up to 250W/8ohm and 350w/4ohm.
Not sharing a common reference point apart from the load itself makes the second leg correct for any error produced by the first one. Result is an amplifier capable of extreme power wile delivering exquisite smoothness and low level resolution.

The driver stage is isolated by the interstage transformer and is not influenced in any way by the output stage maintaining tone colour and resolution at all powers levels and loads.

Having the output stages floating around the load prompted for the use of a unique biasing technique powered by solar cells. This was the quietest galvanic isolated power we could come up with. Using opto-electrical conversion we control the bias by adjusting light intensity in the control circuit.

Teres is an example of modern technology solving age-old problems allowing us to go a step beyond.

The physical appearance of Teres is typical Thrax understated elegance. Exquisite finishing ads to the presentation of a solid block of metal like a bigger brother of Heros.




  • Audiophile super long life C3g input tube
  • Silicon carbide rectifiers
  • Shunt regulated power supply
  • Solar cell bias of output stage
  • Battery bias of input stage
  • Microprocessor controlled operation
  • NO feedback
  • Special grade screened power transformer
  • JFET/MOSFET cascode output devices
Meer info
  • Officiële webpagina klik hier
  • Prijs: vanaf € 25.200
  • Heeft u interesse in een THRAX versterker? U bent na afspraak welkom in onze showroom om de producten te komen beluisteren