In a Twitter conversation between [Oliver Heldens](http://equipboard.com/pros/oliver-heldens) and Deadmau5, Deadmau5 states he's using the Eventide H4000. The conversation follows: **Heldens:** "I wish I'd could make my mix sound like yours. At the sound checks when they play ur stuff I'm like damnn" **Deadmau5:** "@OliverHeldens just get a neve MBP and you're all set." **Heldens:** "@deadmau5 ok will check it out! And what reverbs do u use? I feel ur reverbs have to do a lot with it as well?" **Deadmau5:** "@OliverHeldens still using the eventide H4000."more
This is a picture of the rack John used for the 2002 World Tourbulence tour. Among the various units there's an Eventide DSP7000 Ultra Harmonizer (second from top to bottom). Confirmation of this being John's rack can be found in [this diagram from *Guitar Geek*](http://www.guitargeek.com/john-petrucci-dream-theater-guitar-rig-and-gear-setup-2002/) and [at :15s in this video](http://youtu.be/4yUUCRJGdko).more
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