Topakustik Classic 28/4 M or T
Centre-to-centre distance = 21.3 or 32 mm
These grooves are the ideal solution for standard absorption requirements. As with all centre-to-centre distances, the wide grooving also comes with 2 mm, 3 mm and 4 mm grooves.
The advantages of this type at a glance:
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very good sound absorption
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wide frequency range
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good for ceiling assembly
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subtle groove of 3 mm