Collocations for speaker - noun

brilliant (esp. BrE), good, great
featured (esp. AmE), keynote, main, principal
guest, invited, visiting
public
She's a good public speaker.

commencement (AmE)
the commencement speaker at my graduation

after-dinner (BrE)
conference
motivational (esp. AmE)
He makes his living as a motivational speaker.

feature
Each month's service features a different speaker.

invite

speaker at
a keynote speaker at the Republican convention

fluent
He's a fluent Arabic speaker.

native, non-native
a native speaker of English

Japanese, Russian, etc.
non-English

speaker of
speakers of English

left, right
front, rear
sound effects coming from the rear speakers

stereo
The computer has built-in stereo speakers.

set
a new set of speakers

system
phone (usually speakerphone)
He put me on the speakerphone.