"My rack and MPC2000 take the clock from Rick's MPC2000, whilst my MPC2000 goes through this little 8-channel Mackie, so I can turn off or boost things. I select my source via the rack at the top left, which is made by Funktion One. It's really just a channel selector, and the red button in the middle is a mute."more
It's located in the far left of the photo, next to the 'Ecko Shoe Box' and on top of some other gear, that's unfortunately unidentifiable.
On Genius.com, Eminem talks a bit about the production of his track [Square Dance](https://www.youtube.com/watch?v=t0kjCwOFIXQ). He explains, "I like going on stage to this beat. I don’t even know if people care that much about me producing things. It’s fun for me to make a beat, but it doesn’t give me the same feeling or gratification as rapping. I’m not really tech savvy. I still use an MPC 2000. That’s probably a cardinal sin now in hip hop. Everyone’s onto other things. I just use that because I don’t have time to learn something else. I don’t have the patience." The original link can be found [here](http://genius.com/5136597/Eminem-square-dance/Produced-by-eminem-and-jeff-bass).more