Need help?Do you have a question about the Gibson GA-20 and is the answer not in the manual?
Explains safety symbols (lightning bolt, exclamation point) and general warnings.
Lists essential safety instructions for operation and maintenance.
Details Input 1, Input 2, and Mix Input functions for tone shaping and control.
Describes the spring reverb unit and its effect on amplifier channels.
Explains the Tremolo effect and its Speed and Depth control adjustments.
Covers On/Off switch and Play/Standby mode for tube warm-up and idle operation.
Details footswitch input and the Pentode/Triode mode selector for power output.
Specifies the four speaker output jacks and their impedance ratings for extension cabinets.
Lists specific fuse types and ratings for GA-20, GA-40, and GA-42 models by voltage.
Notes that the amplifier ships with a country-appropriate power cord.
Guidance on power cord inspection, socket usage, and avoiding moisture.
Explains how the amplifier is configured for local line voltage upon purchase.
Step-by-step guide to safely change the amplifier's line voltage setting via the fuse compartment.
Explains the purpose of Standby mode for warming up tubes and preserving life.
Instructions for using the power switch and the 'On/Off' indicator light.
Procedure for plugging the guitar into the amplifier's front panel inputs.
Procedure and caution for switching from Standby to Play mode to avoid speaker damage.
Details Class A power ratings for GA20RVT (15W) and GA40/42RVT (30W).
Lists available inputs and the specific tubes/valves used in GA20RVT and GA40/42RVT models.
Explains the role of the line fuse in protecting the amplifier from irregularities.
Step-by-step guide on how to safely replace a blown fuse in the amplifier.
Information on speaker type, quantity, and asymmetrical placement for each model.
Explains the use of the IEC socket for connecting various international power cables.
Guidance on general maintenance and when to contact authorized service centers.
Explains safety symbols (lightning bolt, exclamation point) and general warnings.
Lists essential safety instructions for operation and maintenance.
Details Input 1, Input 2, and Mix Input functions for tone shaping and control.
Describes the spring reverb unit and its effect on amplifier channels.
Explains the Tremolo effect and its Speed and Depth control adjustments.
Covers On/Off switch and Play/Standby mode for tube warm-up and idle operation.
Details footswitch input and the Pentode/Triode mode selector for power output.
Specifies the four speaker output jacks and their impedance ratings for extension cabinets.
Lists specific fuse types and ratings for GA-20, GA-40, and GA-42 models by voltage.
Notes that the amplifier ships with a country-appropriate power cord.
Guidance on power cord inspection, socket usage, and avoiding moisture.
Explains how the amplifier is configured for local line voltage upon purchase.
Step-by-step guide to safely change the amplifier's line voltage setting via the fuse compartment.
Explains the purpose of Standby mode for warming up tubes and preserving life.
Instructions for using the power switch and the 'On/Off' indicator light.
Procedure for plugging the guitar into the amplifier's front panel inputs.
Procedure and caution for switching from Standby to Play mode to avoid speaker damage.
Details Class A power ratings for GA20RVT (15W) and GA40/42RVT (30W).
Lists available inputs and the specific tubes/valves used in GA20RVT and GA40/42RVT models.
Explains the role of the line fuse in protecting the amplifier from irregularities.
Step-by-step guide on how to safely replace a blown fuse in the amplifier.
Information on speaker type, quantity, and asymmetrical placement for each model.
Explains the use of the IEC socket for connecting various international power cables.
Guidance on general maintenance and when to contact authorized service centers.
General| Type | Guitar Amplifier |
|---|---|
| Controls | Volume, Tone |
| Inputs | 2 |
| Model | GA-20 |
| Category | Musical Instrument Amplifier |
| Configuration | Combo |
| Tubes | 2x 6V6, 1x 5Y3, 2x 12AX7 |
| Speaker | 12-inch |
To Next Page
