“It’s taken a long time to find a sound that cut, and not be overly aggressive. I tried a dozen different things, and up until this year when I started using this [PRS] head, it was just a constant battle.

For me the first thing is comfort - not having to second-guess your sound, your tone, your instrument. And when you find an amp that you feel great about, when you know you can bring it down and have the really subtle tones, and then crank it up and don’t have to worry about the amp sagging on you, it frees you up to actually play and not think about the equipment.

With this, it’s been a rock. It feels great, it sounds great, and it’s consistent from night to night. We tried this out in rehearsal in New York City early this year, and it was just Volume and Tone - pretty simple. It immediately fit in really well… it’s been such a blessing to not fight the tone war all night. I can get down to just really playing.”

At 0:24 of this "Rig Rundown", with Premier Guitar, Brian Farmer, Warren Haynes' guitar tech says "Well, depending on what songs we use, is depending on what amps we're gonna use... This is a Super Dallas, it's actually a reverse engineered Paul Reed Smith Head based on the Marshall Plexi that belonged to Eric Johnson."

According to the Premier Guitar's 2009 interview done with Grissom, one of the items that was listed under his gear is the PRS Dallas guitar amp head.