Steve Lukather

Steve Lukather uses the DiMarzio DP254/DP255 Transition Pickups, which are his signature model. These passive pickups feature a flat EQ, as highlighted in a YouTube video by Larry DiMarzio titled "DiMarzio Transition Guitar Pickups for Steve Lukather."

http://www.stevelukather.com/news-articles/2008/05/michael-molenda-steve-lukather.aspx

“I needed somebody to pressure me into doing something different,” admits Lukather. “So I called Hollywood Rentals, and said, ‘Send me all the weird stuff—the silly little Supros and Magnatones and whatever—and all the vintage AC30s and Marshalls.’ I let the amp determine how I played—because you do play differently when you plug into a different amp—and that, in turn, inspired all the interesting guitar sounds for the album. I used a Radial ToneBone for overdrive here and there, but the basic tone is my Ernie Ball/Music Man Steve Lukather Signature Model direct into an amp. Well, I did plug into an ISP Technologies Vector SL subwoofer to get a mammoth sound out of the tiny amps, but any effects you hear on my guitar were added at the mixdown by Steve.

According Steve Lukather's artist page on EMG's website, he uses this signature SL20 pickup set.