"He uses four amps: the pictured Fender Deluxe 2x12 (set brighter) and Fender Deville 4x10 (set darker) combine for his main guitar sound, with an Ampeg combo behind them to enhance his low-end. " - on photo of his amps, Deluxe is visible at the left side.
From her official Instagram post (after a live concert), it is written that Amy uses a Fender Hot Rod Deluxe amplifier. .
Note: Amy's stage name had been accidentally mispelled from 'Shark' to 'Stark'.