YOU SAID:

the majority of a speaker is a heavy metal drum

INTO JAPANESE

スピーカーの大半は重い金属ドラムです。

BACK INTO ENGLISH

Most of the speakers are heavy metal drums.

INTO JAPANESE

スピーカーのほとんどは、重金属のドラムです。

BACK INTO ENGLISH

Most of the speakers is a heavy metal drum.

INTO JAPANESE

スピーカーのほとんどは、重金属のドラムです。

BACK INTO ENGLISH

Most of the speakers is a heavy metal drum.