The phrase "a powerful television" is correct and usable in written English.
It can be used when describing a television that has strong features, capabilities, or performance, such as high resolution or advanced technology.
Example: "The new model boasts a powerful television that enhances the viewing experience with stunning clarity and vibrant colors."
Alternatives: "a high-performance television" or "an advanced television".
With his celebrity boldness, he managed to upstage both the rest of the GOP field and a powerful television network by skipping a Fox News Channel debate and doing a televised fundraiser of his own.
A powerful television producer has been photographed on the toilet.
Even the movies' biggest night will feed that trend: the Academy has lined up Seth MacFarlane, a powerful television writer-producer, as the host of the Oscars.
He portrayed himself to Italians as a self-made man who had built up a powerful television empire by breaking the monopoly of Italy's state-owned broadcaster, RAI.
California — Representative John V. Tunney, Democrat, has opened a 7‐point lead over Senator George Murphy in the Field Poll with the help of a powerful television campaign.
But she jumped in, and with a powerful television spot stressing her role in bringing San Francisco together after the murder of Mayor George Moscone, she surged ahead, though the polls differ.
Without more conventional political follow-up, some analysts say, the march could turn out to be a a day of powerful television images that will ultimately fade, and can thus be safely ignored by the legislators and candidates who are its target.
Was there ever a more corruscatingly powerful television drama, more evocative of a time and a place, than Alan Bleasdale's Boys from the Blackstuff?
That would create two corporate entities: an entertainment giant, driven by a movie studio and powerful television networks, and a much smaller publishing unit containing Dow Jones and HarperCollins.
It was a surrealistic scene as the powerful television lights from the numerous camera crews lit up the nighttime scene.
Like Anthony Taylor, the referee, Van Gaal and Newcastle's head coach, John Carver, did not see an incident picked up by powerful television camera lenses.
