Unlike its namesake, Fender's '57 Twin mini amp doesn't offer a lot of clean headroom; it starts to overdrive at pretty modest volume levels.
"Turn the drive up a little and your reward is spiky dirt"
The tones are responsive, though, and the 2x2 speaker configuration projects a sonic field with more depth than some single-speaker micro amps.
Turn the drive up a little more, and your reward is spiky dirt, which transitions into gnarly transistor fuzz-type sounds at higher levels.