Unless he's faking it using some sort of harmonizer, there are no effects per se. What's going on is double tracking and harmonies. There's an octave lower and another harmony based on major and minor thirds(relative minor of the main vox).

Agreed with the harmonies. It starts out with a band pass filter, but I don't think that is what you are after. The pitch is very tight, so either a very good vocalist or auto tune. (Especially noticeable in the whole step drops on Li-ve and minor third on Ca-re)

Thanks for the quick reply. I can hear the layers now (Helps knowing what to listen for. I guess the doubling or something sounded like an effect to me.

Thanks again.