Mastersound Duetretai Tube Amplifier


Mastersound Duetretai Tube Amplifier – Parallel Single Ended in Class “A” Integrated Amplifier/


Mastersound Duetretai Tube Amplifier

Output Transformer

Mastersound Duetretai Tube Amplifier – One of the most important components in creating a good tube amplifier is the output transformer.

At MastersounD output transformers are wrapped one at a time by hand on a mechanical winding machine, based on the experience, passion and the research of Mr. Cesare Sanavio.

He then transmitted such knowledge to his son Mr. Luciano Sanavio who succeeded in the great challenge of further innovating it in a surprising way. and introducing an innovative and unique construction technique that makes MastersounD output transformer unique in the world. One of which is the Mastersound Duetretai Tube Amplifier.

This precious tradition is the cornerstone of the outstanding quality of our amplifiers, which offer an exceptional performance thanks to their special output transformers. Great dynamics, power and harmonic richness, are the characteristics that a class A tube amplifier can and must have without the classic limitations imposed by traditional output transformers.

Because of this MastersounD, it keeps its secret very carefully.


Tubes Selection

MastersounD tubes selection is the result of decades of research around the world for the best vacuum tubes manufacturers. This continuous research allows us to always select the best tubes in terms of sound quality. Our tubes are readily available and supplied by reliable companies.

Selected tubes undergo thorough quality control tests to ensure maximum reliability and performance.

After installing them on our amplifiers, the two channel waves are carefully aligned.
This step is essential for the perfect stereophonic listening.

Tubes are then tested for almost 48 hours on the amplifiers before packing them and shipping around the world.



The sensitivity we use every day in the pursuit of sound harmony, cannot in any way betray and harm our environment. We are aware that being a small part and at the same time at the center of the world requires the maximum possible use of recyclable materials.

Natural wood that is finely processed by Italian master craftsmen gives MastersounD amplifiers their Italian style, making them unique and timeless.

The chassis is made of steel, a material that in addition to requiring less energy and heat for its production is truly sustainable, because it can be re-melted and then reused.

But basically, a MastersounD amplifier is destined to go beyond our time and reach future generations. Thus, the Mastersound Duetretai Tube Amplifier was made.

Weight 25000 g
Dimensions 490 × 330 × 240 mm


  • Parallel Single Ended in Class “A”
  • Power: 2 x 33 Watt in tetrode configuration
  • Power: 2 x 16 Watt in triode configuration
  • Tubes: 2 x ECC802 – 4 x KT120
  • Input: 3 Line + Phono MM
  • Output: 1 Line (fixed) + 1 Preamp
  • Load Impedance: 4 – 8 Ohm
  • Bandwidth: 8 hz / 40 khz 0 db
  • Automatic Bias
  • Output Trasformer: MastersounD
  • Supplied with remote control
  • Negative Feedback: 0 dB
  • Dimensions: 49 x 33 x 24 cm
  • Weight: 25 Kg


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