Billy Sheehan

"The Pearce Pre-amp is just a supremely great distortion and clean. The clean is always on. The distortion comes on when necessary," Billy Sheehan says, at 4:40 in this Premier Guitar rig rundown.

"I'm using an LH1000 for the low end. Another LH1000 for the pedals," says Billy Sheehan, at 3:30 in this Premier Guitar rig rundown.

"I use the HA5500 for my high end," says Billy Sheehan, at 4:35 in this Premier Guitar rig rundown.

In his own website Billy Sheehan published the photo with his SVT-4 PRO. I Have personally see him using that during a concert of Mr Big in 2011 @ Alcatraz in Milan. One of presets of Line6 Helix Is named "Sheehan SVT-4 PRO"

"There's a definition of tonality I hear in my head with each note that I play and I associate that Sonically with Hartke," Billy Sheehan is quoted saying, on Hartke's website, which says that Sheehan uses AK 410 Cabinets.

In the video titled "Steve Vai 'K'm-Pee-Du-Wee' Full Video" by Everybody-Loves-Gav on YouTube, Billy Sheehan can be seen using a Roland Micro Cube mini guitar amplifier.

For The Winery Dogs' 2015 tour, Sheehan is running his Hartke LH1000s into 3 of these 1X15 cabinets, and also carries 2 spares.

"There's a definition of tonality I hear in my head with each note that I play and I associate that Sonically with Hartke," Billy Sheehan is quoted saying, on Hartke's website, which says that Sheehan uses AK 115 Cabinets.

As stated on Hartke's/Samsontech's Artist pages.

In this video of an early era of Mr Big, we can see Billy Sheehan playing along with his drummer bandmate, through two Ampeg 8x10 cabinets