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A correction: the installation above is not Reinhard’s but by Klaus Speth. Klaus and Reinhard experiment with audio together and Reinhard has his own Goto setup. Here is more information about Klaus’ system with Reinhard’s comments:

Midbass horns: are there are two 20 cycle bass horns which normally have 6,50 m in length and 3,20 in mouth diametre (we had that for testing purposes and we thought, well, that's it, the space is there and the depth to be able to listen to, but to our surprise it was not !  they didn't perform that well, astonishingly neither with natural nor electronical time alignment), so Klaus cut them down to 4 m to get rid of the time delay. They are not - as one might presume only from the mouth diametre - 40 or 50 cycle horns, they are true 20 cycle, but cut off. These horns run from 30 - 70 cycles, each with double Goto SG38WN membrane bass - not Goto compression driver.

Uperbass horns: are 70 cycle horns, see photo, which are about 2 m in depth and which run from 70 - 200 cycles, each fed with one SG146LD bass compression driver… Yes, it is eleven leaves, not twelve. Right, because of the nature of the produced waves. Klaus didn't want to have any reflections and so on by horn amplification. For exactly the same reason the listening room - which is some 130 square meters with about 14 m in depth - is not rectangular, there is nothing parallel, the walls in depth go out for one meter in the run... so no standing waves and disturbing reflections and so on... Klaus started with 8 leaves, then 10 and then 11 - which to my feel is the best...

Midrange: Goto SG505DX with S150 horn

Tweeter: Goto SG370DX with S600 horn

SuperTweeter: Goto SG160

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