As shown on the Ernie Ball website, John Petrucci uses these strings on his guitars.
Kirk custom the set using the RPS-10 And the RPS-09
According to Premier Guitar's interview, one of the items Brown uses are the Ernie Ball RPS-10 guitar strings.
EB RSP strings are excellent for bending and have a huge tone. I find them to have more mass, bottom end, nice highs on treble strings. Use them on my MM Steve Morse signature guitar.
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