, Akron-based effects maker EarthQuaker Devices rocked guitarists’ world with a little box called the Speaker Cranker. Featuring just one knob, labeled “More,” it could push your speaker to the edge of breakup without dramatically coloring your tone or affecting transparency. The result was thicker, crunchier power chords and singing leads that bloomed with rich harmonics and an almost full-frequency response. The Speaker Cranker is out
