Gibson GA-20 Owner's Manual page 20

overload to the output amplifier and other conditions that can be unsafe or damaging to
the amplifier. If your amplifier continually blows the line fuse, there is a problem that must
be corrected before the amplifier is put back into service. Contact an authorized Gibson
Amplifier Service Center. See above for replacement fuse specification.
To replace the fuse, first remove the power cord.Then use a thin blade prying tool to pop
out the fuser holder. Remove the old fuse and put the new fuse in the holder. Push the holder
in until it snaps into place.
NOTE: Never replace the line fuse with a higher amperage rating. It is not only unsafe, but it
leaves your amplifier unprotected in the event of a tube or component failure and invalidates
your warranty.
SPEAKER
The GA20RVT, GA40RVT & GA42RVT come equipped with 12" Eminence Legend Speakers.
The GA20RVT & GA40RVT come with a single speaker, while the GA42RVT comes with two.
Your GA20RVT or GA40RVT feature asymmetrical speaker placement (set off to one side).