Article byWieger about speaker kit Duetta I have been “stumbling” onto reports about the Eton chassis, with beautiful flowery descriptions and installed in all. Your specialist für loudspeakers, home hifi, pro audio, car-hifi, electronic parts, capacitors, inductors, resistors, circuit boards and accessories. Actually i had no need for yet another speaker. Our livingroom was well equipted with SB18, SB30 Center and a MDS12 Subwoofer. But our bedroom had old.

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Very few speakers have been as whole-heartedly adopted by the DIY community in the last few years as the Duetta. What makes this even more amazing is that it was, after all, chosen as a reference for a trade journal.

Especially in the online world, there are always people lying in wait to tear the latest acclaimed product to pieces. So there must be something special about this box that makes potential critics fall silent quickly. Especially in the good old days with Heinz Schmitt as the chief editor of a trade journal, things were very different from what people generally imagine. Well, we still had 14 days to take care of it. The result was a tower version of the later Duetta Top, which was rated one of the ten best speakers at the last High-End fair in Frankfurt in A few months later, when we needed a special assembly kit for the issue, our stated goal was to come up with something even better.

So Heinz threw himself into the project and used his computer to develop the most complicated interior structure we had ever built. We had speaker boxes in there that were worthup to five figures in euros, highly acclaimed, beautiful to look at and often praised as a standard for the hi-fi world, each one playing at the highest level, and Duetta was able to keep up.

Of course there were some differences in sound, but they could not be described as being good or better; they simply sounded different. Now more than five years have passed, and the world has not stood still.

My daily exposure to the Duetta drug has allowed me to refine a few small things that only became noticeable after many hours of listening. The chassis measurements were taken inside the Duetta cabinet.

Data from a standard baffle board creates completely inaccurate results in simulation programs if the influence of the simulation program is not taken out and the influence of the baffle is not taken into account. The structure of the cabinet evolved through duetfa steps. The many boards in the interior created stable connections for the walls; these in turn were divided into smaller segments with a lower tendency to oscillate.


Still, dyetta a couple of boards would do the trick; without any perforations, they each simply connected three plates, thereby creating areas of varying sizes and thus varying resonance frequencies in much higher ranges.

The lid was given a crossbar to keep resonances from traveling upward. The back wall was already connected to the sides through the crossover compartment, so only the reflex channel — which after all is not reinforced in the back — still needed stabilization. We provided that in the form of an upright board about 20 cm tall. When I was also unable to convincingly explain the benefits of having a separate crossover, it brought the era of the crossover enclosure to an end.

That reduced the depth of the lower structure by 5 cm and meant winning important points with the significant others of its future owners. Finally, I added another board duefta the back wall to finish off my cabinet modifications.

Finding the best components is a chapter unto itself. Almost every publication claims that the more expensive the components are, the better the sound.

November – Loudspeakermagazine | Loudspeakerbuilding

Does that mean one of them is good and one is bad? In that case, why even offer the bad one? By no means do I want to claim that all capacitors or inductors with the same value sound identical.

However, the differences — as with amplifiers, CD players and cables — tend to be divided more according to taste than quality. Electrolytic and oiled-paper capacitors tend to whitewash the sound somewhat, which is good for some metal tweeters.

Expensive MKPs give the playback a little more detail and airiness, but depending on the box it can also be wton bit annoying. Air coils with thick wire are not necessarily preferable to core djetta. In one, the wire length becomes a limiting factor, and in the other there are the saturation and distortions caused by the iron core. It should be said in advance that I will be discussing errors here that occur at a very high level and that are only apparent after comparing two versions for a long period of time.

I adjusted the speakers to my own personal sense of hearing over the course of many years, and I do not want to claim that we have seen the end of the small modifications.

Sometimes the tones were a little too loud and sounded washed out, which was especially noticeable at lower volumes. The thick transformer core coil was quickly identified as the guilty party. It was replaced by a much cheaper core coil made of special sinter material, which provided an additional 0. My tried and true MKP capacitors were much more neutral, so they had a home in my preferred boxes from then on. I banished the L regulator from the tweeter crossover altogether, since measurements taken in my listening room and on my own equipment showed it to be unnecessary.


I detected a slight nasal playback here, which clearly dudtta it. Since I like to use the Duetta with my modified bargain tube, I put a capacitor in the signal path of the that also decouples it below its installed resonance.

This step smoothes out the impedance below Hz, which the VRE repays with tighter bass tones. An impedance linearization for the transition area between the mid-range speaker etoj the tweeter rounded out my Duetta modifications for the time being.

Duetta Standtop by Matthias – August – Loudspeakermagazine | Loudspeakerbuilding

I can save my words here, since the diagrams speak clearly enough for themselves. The slight sustained decrease between 80 and Hz prevents the usual mid-bass exaggeration found in many boxes, which is caused by environmental influences. With a 4-ohm minimum and nearly 5 ohms throughout above Hz after connected impedance correction, even a small tube amplifier should be perfect here when it comes to creating beautiful sound at home.

A small hook in the angle curve at 6. Describing the sound of my favorite box in my own words is always a etpn task — how are you supposed to avoid hiding its suetta under a bushel yet still sound plausible while singing its praises? Although I like the plasticity of the sound, the whole thing could be a little more harmonic. So I was thinking about building a speaker. Since I have zero experience, I dug through magazines, read reviews, etc. In the end, I combined some work errands with the abovementioned listening appointments.

But what about the music?? While I kept putting in one CD after another at name omitted to pick out all of the effects high range, drive, bass, ambiance, detachment from the speakers, duetga.

With just one piece, the box proved the beauty of its possibilities. The ambiance was at least as good as with the Audio Duett, but without the slightly annoying undertone ok, since this thread is very analytical already.

There was nothing out of place, only beauty. Silky high tones; pleasant, exquisitely fine mid-tones; a deep, dry bass. Dear Udo Wohlgemuth, thank you for the wonderful day I spent with you. My speaker problem has been solved. Udo Wohlgemuth Duettta principle: The Duetta is available as a complete Set exclusively from Intertechnik.

Lautsprecher, Selbstbau, Eton, Duetta, ER4 und Etonkombi spielt auf allerhöchstem High End Niveau

You want to build this kit as well? Teilen Sie diesen Bericht: Customer rating More articles Customer images Questions Home theatre. Please verify that you are human by klicking the box next to this. Back to top Back to the overview.