The phrase "act as speakers" is correct and usable in written English.
It can be used when referring to individuals or entities that perform the role of speakers in a particular context, such as a presentation or discussion.
Example: "During the conference, several experts will act as speakers to share their insights on the latest research."
Alternatives: "serve as speakers" or "function as speakers".
Katydids rub their front wings together, and membranes within their wing veins act as speakers.
In all communities, speaking (or signing) is learned by children before writing, and, typically, people act as speakers and hearers much more than as writers and readers.
The rain hits the lids while the upturned pans are wired to act as speakers.
These restructured papyrus drapes will act as speakers for the music that will ooze from its pores, a layering of metaphors and creative dimensions that aim to both titillate and lead the audience.
Whenever the lieutenant governor became acting governor, the Senate was to elect one of its members to act as Speaker; that individual then became next in the line of gubernatorial succession.
After the formation of the Fox-North Coalition, Mansfield agreed to act as Speaker of the House of Lords, taking up his post in February 1783.
During the 1990s cardiologists typically acted as speakers at events hosted by industry where they would preach the superiority of calcium channel blockers, angiotensin converting enzyme inhibitors or α blockers over thiazides and β blockers (author's personal experience).
In two cases Labour MPs who acted as speaker resigned their seat: these were treated as Labour seats for the purposes of the analysis.
The "Where's Dad?" screening was sponsored by the Congressional Family Quality of Life Advisory Committee, which Wolf has chaired ever since Newt Gingrich established it, as one of his first acts as Speaker, to help deal with a serious absentee-parent problem among legislators.
Boehner, in one of his last acts as Speaker, negotiated a budget deal with Obama and the Senate to raise the debt ceiling until March, 2017, after a new President is sworn in, and set funding levels for the government for the next two years.
The 1799 constitution created the office of lieutenant governor, who acted as Speaker of the Senate, but was not otherwise considered a member of that body.
