The ornamental design for an electricbass, as shown and described.
FIG. 1 is a perspective view of the front, top and left side of an electric bass showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a left side elevation view thereof; and,
FIG. 6 is a right side elevation view thereof.
The broken line showing the electric bass is included for the purpose of illustrating portions of the electric bass and forms no part of the claimed design.