I want to get a sound similar to Dave Grohl from Foo Fighters or Deryck Whibley from Sum 41. (Yes, they are heavy. http://www.youtube.com/watch?v=ZEbemsHuB-4)

I understand you can't get your voice to sound EXAZCTLY like someone else's, but I love the loud vocals from Sum41 and the growly yelling from Foo Fighters.

I think these sounds are caused by using a really low falsetto (So you can easily get to the high notes without cracking.) and a nasally tone, but I'm not totally sure.

I've already got all of blink_182/Incubus styles, which I will be using a lot, but I like variety.
Low falsetto? What do you mean exactly?

I don't think it's possible to have this type of distorted voice with falsetto. I'm not familiar with sum 41, but I'm pretty sure Dave Grohl doesn't use falsetto at all.
Quote by gateway01
I mean like you use your falsetto voice, but use it as low as you can without using your lower voice. (refer to the youtube link)

I'm pretty sure there's no falsetto. It's just pure head voice.