Now witness the firepower of this fully armed and operational battle station.
— Palpatine Darth Sidious (Ian Mcdiarmid)
8 seconds sound clip from the Star Wars: Episode VI - Return of the Jedi movie soundboard.
You can hear this line at 01:41:33.404 in the Blu-ray version of the movie.
Quote context
[...]
- Only the fighters are attacking. I wonder what those Star Destroyers are waiting for.
- We're in attack position, sir.
- I have my orders from the Emperor himself. He has something special planned for them.
- We only need to keep them from escaping.
- As you can see, my young apprentice, your friends have failed.
- Now witness the firepower of this fully armed and operational battle station.
- Fire.
- That blast came from the Death Star. That thing's operational!
[...]