The ceiling speakers produce a good sound that are eingbaut in a plasterboard ceiling. Installation with springs is easily the speakers sit tight in the ceiling, just a pity that there is not yet another speaker colors (Matching the bulbs). Feel, however, that the "highs" not really "get out" even though I have tried different Einstellmodis. Therefore only 4 stars from me. But is a subjective feeling, that may be due to my ears. But serve their purpose, namely, the "sound" in the bathroom, to the satisfaction of all bathroom users !! And with growing enthusiasm.
