Eric Johnson's guitar strings: the Ah Via Musicom tone, sourced

Eric Johnson is an Austin, Texas guitarist known for a violin-like, singing lead tone built from a genuinely unusual combination: multiple amps running at once, each doing one job, and an obsessive, well-documented attention to gear detail. Born August 17, 1954, in the city where Stevie Ray Vaughan later built his career, he started on guitar at 11 and worked through Austin's local scene, including the fusion group Electromagnets and years as a session player for artists like Christopher Cross, before his 1990 major-label album Ah Via Musicom went platinum.

Per Wikipedia's sourced biography, that album's "Cliffs of Dover" won the 1992 Grammy Award for Best Rock Instrumental Performance and remains his best-known composition, out of eight Grammy nominations across his career. The same source documents his three G3 tour appearances: the original 1996 run with Joe Satriani and Steve Vai, a separate 2006 Latin America leg with Satriani and John Petrucci (that year's Satriani/Vai dates, in Australia, didn't include Johnson), and a full 2024 reunion of the original 1996 trio. He continues to release new studio and acoustic albums.

Johnson's reputation for tone obsession is not a myth invented by guitar magazines, it shows up directly in his amp count. Rather than one amp trying to cover clean, crunch, and lead, he assigns each job to a different amp built for that specific job: Fender Twins for headroom, a Two-Rock for midrange crunch, and a vintage Marshall plexi for the lead tone he is most known for. That approach demands a switching system to match, which is why his pedalboards are dominated by custom-built amp switchers as much as by effects.

The string gauge choice on his old GHS signature sets followed the same logic in miniature. Rather than a single set across every guitar, he matched gauge to scale length: heavier strings on shorter-scale guitars keep tension in a comfortable range, lighter strings on longer-scale guitars do the same. It is a small detail most players never think about, but it is the same instinct that drives the four-amp rig: match the tool to the specific job, not the other way around. Our own E standard tuning guide covers the tension math behind that swap in more detail.

Before the D'Addario switch, Johnson played GHS Nickel Rockers in two signature gauges for many years. GHS's current online artist roster no longer lists him, but the sets below remain available for sale and are worth knowing if you're chasing his pre-2016, Ah Via Musicom-era tone specifically.

For a contrasting blues-rock rig built around a single plain gauge instead, see Buddy Guy's Ernie Ball Power Slinky setup.