Um no, there are thousands. This is taken directly from the Executor's page on Star Wars wiki:
Over 5,000 turbolaser batteries and ion cannons
2,000 turbolaser batteries
2,000 heavy turbolaser batteries
250 heavy ion cannons
500 point-defense laser cannons
You can claim they aren't as amazing as I am saying, but people with far more time on their hands than I do have done the math regarding the energy it would take to accomplish what they showed in the movies and novels. Even if one turbolaser had 1/100th of the firepower of the spiral beam that killed SG, he will still get blasted to death in a moments notice. He literally stands no chance.
KK42 wrote:When you come up with evidence for this, I will believe you. But as of yet, I have not found said evidence.
My evidence is what RZK posted earlier. One blast of EMP waves took out just the lasers of Moguera. It would takes SG literally forever to accomplish the same thing against the thousands of turrets scattered across the hull of the Executor.
My other evidence is in the armaments of the Star Wars ships. Every capital ship in both trilogies have ion cannons mounted on them. Every. Single. One. If EMP attacks of any kind were so effective, we would have seen capital ships being disabled like the one in TESB all the time. Only the most powerful of ion cannons are capable of shutting down even a regular star destroyer temporarily. The Executors shields are even more powerful.