The phrase "a powerful echo" is correct and usable in written English.
It can be used to describe a strong or significant reverberation of sound, or metaphorically to indicate a strong impact or resonance of an idea or sentiment.
Example: "The speech had a powerful echo in the hearts of the audience, inspiring them to take action."
Alternatives: "a resonant echo" or "a profound echo".
The ship was fitted with a powerful echo sounder The ship was powered by four Westinghouse geared steam turbines, each driving one propeller shaft, using steam generated by 12 Yarrow boilers.
The campaign carries a powerful echo of the populist creed espoused by Donald Trump.
As a result, the black Seminoles' claims of discrimination by the tribe have a powerful echo on Capitol Hill.
Instead, in both theme and target audience, Trump offered a powerful echo of Richard Nixon almost 50 years ago.
When the theme developed, other groups of dancers followed her, and the way their rushing across the stage caught the fleeting delight of the music was suddenly a powerful echo of Fokine's "Sylphides" finale.
There is a powerful echo of the ethical questions they raise in the work of Mr. Doblmeier, whose impressive filmography includes the documentary "Thomas Jefferson: A View From the Mountain," which also addressed issues of morality in a flawed world.
As I drifted into unconsciousness this past Wednesday night, I was presented with a question: "So, are you still an island?" This disembodied voice, a quiet but powerful echo, jolted me to full consciousness.
On WhatsApp, the most toxic aspects of fake news multiply: The platform exacerbates pockets of powerful echo chambers in a political environment already deeply polarized and makes tracking the reach and origins of disinformation particularly difficult for researchers, journalists, and, in Brazil's case, the federal police.
The echo with higher power is easy to detect, but the less powerful echo is no stronger than the false alarms.
The SNP's reluctance to raise personal taxes or unfreeze the council tax, which benefits the middle classes disproportionately, is another powerful echo of George Osborne's approach in the rest of the UK.
Money: The most powerful echo!
