A "powerful amplifier" refers to a device that increases or boosts the strength or volume of an electrical signal, sound, or data. It makes weak signals stronger, allowing them to be heard, seen, or used more effectively. Full definition
There are dual speakers with powerful amplifiers (BoomSound). (gogi.in)
Linda Ong, founder and CEO of TruthCo., a New York City - based branding analytics consultancy that works with entertainment brands to help them keep their marketing relevant, says people can't get enough of celebrity emoji apps because they're powerful amplifiers of superfandom. (entrepreneur.com)
They too would not be left behind — and it seemed that they had managed to hire the most powerful amplifier. (religion-online.org)