Which speakers you choose in a studio is primarily a matter of taste. The ear of the mastering engineer will get used to a pair of good speakers over time. In some studios you also use several different speakers. This can certainly be useful as well. Depending on the way of working and the engineer's custom.
Nevertheless, there are some criteria that are a prerequisite for professional mastering.
Einige Mastering-Ingenieure setzen beispielsweise auf hochwertige Hifi-Lautsprecher. Diese klingen aber viel „weicher“, als die linearen Monitore. Kleine Änderungen hört man mit diesen eher schlecht oder überhaupt nicht, weshalb dies nur bedingt zu empfehlen ist.
A high-quality monitor that transmits a high frequency range linearly can be described as a good tool in a mastering studio. However, hi-fi speakers are well suited to review the finished mastering at the end again from the perspective of the normal consumer.