Horn support system, designed to move the horn up and down according to the calculated positioning values. In the case of the double-rectangular and triple-rectangular the maximum value is ±30 cm from a central reference position. In the case of the rectangular arrangement, the value is ± 42 cm. This cell support allows for the positioning of all horns in their optimal location as described in this paper. This is further discussed in the companion study in Paper (II) (Wuensche et al. 2022).