The last Mesa with just six knobs was the seminal Mark I, introduced way back in 1972. Since then the Californian company has proudly packed its amps with features to give we guitarists ever more flexibility. Alas, many of us are simple creatures and frequently bemoan 'over-complication': can't we just plug in and go? Welcome the Electra Dyne, then, a Boogie-shaped gauntlet for even the most the pot and switch-phobic.