Why does Dutch & Dutch consider the room part of the system?

Because what you hear depends on both the audio system and the room in which it plays.

Traditional hi-fi has long focused on choosing and matching components: sources, amplifiers and loudspeakers. How the system will interact with the room often comes later.

Yet the loudspeaker is both the end of the signal chain and the beginning of the acoustic chain. Both sides deserve equal attention. Dutch & Dutch brings them together in the design from the start.