Communitys JP6, Kemper, Mesa Mark 4 = Progressive! By ernieball.com - July 21, 2017 Share on Facebook Tweet on Twitter JP6, Kemper, Mesa Mark 4 = Progressive! Hey guys, check out my new vid, my 2004 JP6 still rocking! Kemper profiling amplifier, Mesa Boogie Mark 4 metal test Nick K profiles – YouTube read more Source: http://forums.ernieball.com Tags: amplifier, Ernie Ball, Ernie Ball Guitars RELATED ARTICLES Axis Super Sport Locking Tuners Replacement Volume Pedal Problems Musicman Axis whammy bar not fitting in double locking system. Stingray Pots (1991 2EQ) .. and Hello! Been a while… resurrecting '97 EX New guy into MM guitars! What should i know? Help :Sterling stringray ray 34 I have a question about the paint condition of this guitar.