The 100W Marshall Plexi 1959SLP all-tube amp head cranks out fabulous lead distortion and tight crunch exactly like the original '67 to '69 amp that it emulates. Inspired by Pete Townshend's unquenchable thirst for VOLUME, the Marshall Plexi 1959SLP guitar amp delivers 100W of power from 4 EL34s and 3 ECC83 tubes in the preamp—the exact configuration of the original. Marshall also equips the Plexi 1959SLP with a bypass series FX loop, 3-band EQ, and presence control.