Eric Peterson

That was the EVH 100-watt going through Marshall Greenbacks. You’re in the studio and you end up trying different cabinets. I ended up using on Dragonlord, the EVH with the two Celestion 30-watts that comes with the cab. I also used my Engl cab that’s got two speakers in it and I think we had that one up too. I combined that with the Engl Savage 120. Blending stuff is cool but I always try and stick with one amp. When you’re in the studio, you might need a little sizzle here and there so we had other amps just pop in if we needed some extra kick instead of applying a Tube Screamer or whatever.

3:18 "And then the EVH mark 3 amp. I used these on the last two records"

It just sounded really thin and weird to me. I didn’t like it. I kinda moved toward Mesa Boogie and the Mark V. I just had this wall of sound. I remember having the Strategy and the Rectifier cabs before they were Rectifier cabs. Actually, they were maybe like two inches thicker.

"Peterson keeps it consistent and affordable on tour by leaving his Marshalls at home and running his guitars into a Line 6 Relay G55 wireless feeding a Kemper Profiler PowerHead that’s driving an EVH 5150III 4x12 loaded with Celestion Vintage 30s. All his effects—including wah—come from the Kemper, which Peterson controls with a Behringer FC1010 MIDI foot controller.," reads this Premier Guitar rig rundown.

According to this Premier Guitar rig rundown, Eric Peterson uses an EVH 515III cabinet.

In the Loudwire video "Thrash Musicians Play Their Favorite Riffs," Eric Peterson is seen using a Vox MINI3 G2 practice amp. However, it resembles the earlier G1 version.

Eric Peterson confirmed the use of Marshall JCM800 2203 amplifiers, stating, "We were using regular JMP 800 Marshalls and then we got JCM 800s with 25-watt speakers with a parametric EQ, which was a three-band EQ with a Tube Screamer. That was the tone we had for The Legacy and The New Order." This information is sourced from an interview on Ultimate Guitar.

"Around The Ritual is when I switched. That was when I switched to the Rectifier and that was for Demonic, Low and The Gathering, which was kinda a rebirth in Testament. From 'Low' all the way up to now, I’m totally happy with the sound. The stuff before is kinda weird but then again The Ritual sounded good. Nigel Green and Tony Platt [both of them worked with AC/DC] mixed it and worked with Mutt Lange and worked with all our old-school heroes like Gary Moore. So those guys had some tricks up their sleeves."

Testament guitar tech Jeff Cummings posted a picture on Instagram of Eric Peterson's guitar rig used on the Thrash of the Titans 2026 tour. A Seymour Duncan Powerstage 700 can be seen in the rig along with a Neural DSP Quad Cortex.