This is the 2387th most frequent Japanese word.
スピーカー
"Speaker" (a device for producing sound or a person who speaks).
In this sentence, 'スピーカー' refers to electronic audio devices used to emit sound.
私は新しいスピーカーを買いました。
I bought new speakers.
In this sentence, 'スピーカー' refers to a person who delivers a speech or presentation.
彼は会議でスピーカーとして話しました。
He spoke as the speaker at the conference.
In this context, 'スピーカー' again refers to audio apparatus, emphasizing its installation in a location.