I also finished the sound bar for the Sonus 60 (almost the same as the Sonus 40, but a little lower).
I can say it was worth it, I'm very happy!




If anyone wants to build their own soundbar and has any questions, I'll be happy to share the details!

Yes, of course.
It is necessary to set the t.amp crossover on each output: High pass at 315Hz, slope LK-24, exclude Bypass.
The volume must be adjusted (for each output), according to your taste.
In general, I recommend keeping the Sonus outputs +6 on each individual output, and maxing out the ext output, and then lowering the levels from the T.amp mixer; this is because the t.amp generates some background noise when set to 0dB, so it is best to enter the T.amp with the loudest possible signal, and then turn down the level from the t.amp mixer so as to lower the the noise level.
However, this way the external volume will not follow the volume of the internal speakers if you change the internal volume frequently.
In the latter case, it is better to set the outputs of the Sonus to +6, and align the internal output with the external one from the pot (there is a function in the "progr. function" window of the Sonus), and adjust the level with the t.amp mixer (probably at levels above 0dB).
This way the inside and outside levels will always remain balanced when turning the master volume up or down.

This is a soundbar designed "in addition" to internal amplification; it is absolutely not suitable for use without internal amplification.
Frequencies below 300 Hz are well reproduced by the four midrange and subwoofer already present in the Sonus. Furthermore, the low frequencies are omnidirectional, so the ear hardly locates them in the environment; that's why they blend well with the sound bar speakers (which are higher up. There are no time alignment issues either, the sound bar being equidistant from the other internal speakers at the listening point).
The effect is an increase in definition, and a horizontal and vertical broadening of the sound stage is created, which is what is needed to create the illusion of being in a church.
Naturally it is essential to find the right balance: if too loud, the illusion is lost because the sounds become too directional upwards, if too weak, the illusion is not created.
Every ear (and every room) is different, so it's best to adjust the levels to suit your taste.
However, you can also adjust the dsp crossover around 100Hz to have a greater frequency extension, but in my case the low frequencies "dirty" the sound and prevented the right illusion from being created.

It is beautiful! The finish is perfect!
Remember that the 3FE25 has a fs at 110Hz so it is essential to put a high pass filter, otherwise the distortions will be quite important. But if you have the t.racks you can conveniently set the crossover frequency via software. Also remember to use balanced cables (TRS) from the organ to the tracks.
Also give the speakers time to break in (at least 10 or 15 hours of use), because they are limited when new.

Let me know your impressions!

In my two organs (and in my environment) they have made a tangible positive difference!

Hi Andreas,
a greater number of channels undoubtedly helps to further reduce the intermodulation distortion (already very low in the Sonus/Ouverture amplification). Of course, in a solution with 12 loudspeakers it is necessary to evaluate the cost/benefit ratio. I don't have a single answer, because the 4-channel soundbar was the result of some experiments and attempts. In the end I liked the result, but I really have no idea if a sound bar with 12 channels can really add more..
Please note that the sound bar is intended to be used in addition to internal amplification. This is an important element because the emission of these loudspeakers starts at over 100 Hz, and therefore must take advantage of the mid woofers and the subwoofer present in the organ to work well.
Balance is still guaranteed with 4 speakers, but I think that with 12 channels it will be necessary to think of different solutions, with the probable addition of at least one subwoofer, but it's just an idea..