The compressed to death but clear loudness! Then I found out a famous mastering engineer blew out a few bulbs in his mastering house wile mastering 2001 to perfection. I knew I couldn't achieve that with plugins I downloaded for free.
Then used to try to get the vocals to match his till I found out he used a Avalon Amp and Sony C800 (8,000 microphone). I knew I couldn't achieve that with a 200 dollar mic and preamp.
My guess would be Shock G cause it sounds like they went for a funkadelic type vibe with his voice.