Readers (dutch) chasing audio nirvana for a longer time, will recognize  the name Audio & Techniek. For a long time this was the title of an audio magazine that was quirky and did not seem commercial at all. It may therefore have to stop abruptly. This magazine has also aroused my enthusiasm for audio, DIY and tube amplifiers.

The essence

Audio and technology: 2 things that are inextricably linked. Especially when it comes to reproduction of audio.

I will discuss the various components of my self-build music installation. I will also regularly provide updates with the latest state of affairs.


I use low-power tube amplifiers (2 Watts) based on the AG9016. I use the still easily (and cheaply) available EL95 in combination with the EF86.

Tubes (valves) in combination with modern technics

Music is streamed via the rapsberry pi that plays with a squeezebox server over the HIFIBerry dacplus.

The HIFIBerry digi pro is ready to be built-in.


I regularly experiment with new techniques. In combination with the pipe technology, this can lead to remarkable results.


Experimenting and listening

In the beginning I do not focus on the “looks” and start building on an “open” chassis. This makes it possible to make changes without too

much trouble. After each change, a period of listening follows.

Sometimes I switch back to the previous circuit after a month. Often you only hear the difference and you know whether it is positive or not.

Advantages and disadvantages of low power

Building tube amplifiers with low power has the advantage that all components can remain relatively small. As a result, they are often less expensive than their larger brothers with the same quality. The disadvantage of the low power. There are not so many loudspeakers that can produce enough volume (especially at low levels) with 2 watts. The solution here is also self-building. In my blogs I will regularly write about the various possibilities.

The power supply

You will see that I paid a lot of attention to power supplies. Both of the tube amplifier (s) and of the DAC.


My preference goes to stabilized power supplies with transistor or tube as regulator. Switching power supplies are getting better. Especially when it comes to size and efficiency, these are preferred.



Cables and other expensive equipment

I am convinced that cables and wiring must be of good quality. Plugs / plugs must be clean and sufficiently clamped. I do not use expensive cables or connectors myself. I do not find the “profit” that is made in relation to the costs.

The best “tweak” is free!

You can often get the biggest noise damage by experimenting with the arrangement of the speakers. From experience I can say that this is one of the most important tweaks … and free!

Because your opinion is important to me, reactions are always welcome, keep it positive!