Not to sound like a complete ignoranus, but what is a stud multiplier?
They are red bricks you can find in certain levels and then purchase, which will, when turned on, multiply your stud total. And they're stackable. So if you find the x2 multiplier, and then find the x4 multiplier, and then turn them both on, you'll then have a x8 multiplier. Once you get them all, you can have a total multiplier of 3800 or something ridiculous like that. You'll get True Jedi within seconds of starting the level, and this also makes it really easy to get the "max out your stud counter" achievement (which is 4,000,000,000).
(And if that was an Ali G reference, nice work.)