I claim the ornamental design for a beer keg shaped guitar amplifier, as shown and described.
FIG. 1 is a ¾ front view thereof the beer keg shaped guitar amplifier.
FIG. 2 is a front view thereof the beer keg shaped guitar amplifier.
FIG. 3 is a rear view thereof the beer keg shaped guitar amplifier.
FIG. 4 is a left side view thereof the beer keg shaped guitar amplifier.
FIG. 5 is a right side view thereof the beer keg shaped guitar amplifier.
FIG. 6 is a top view thereof the beer keg shaped guitar amplifier; and,
FIG. 7 is a bottom view thereof the beer keg shaped guitar amplifier.
My guitar amplifier design is characterized by a beer keg shaped enclosure with a loudspeaker mounted on top. The guitar amplifier shows an input jack, output jack and switch to change tones.