Tone; Reverb; Footswitch Sockets - Gibson “Goldtone” GA-15 Operating Instructions Manual

Setting the VOLUME at about 12 o'clock gives lovely warm clean sounds which can then
be switched to a nice, not too saturated overdriven tone.
For total and instant control over a range of clean and overdriven tones we recommend
turning the VOLUME control all the way up. Without the extra gain stage switched in the
player can then back off the volume on their guitar for clean sounds, turn up fully for
some crunchy, responsive power amp overdrive, and then kick in the extra gain stage for
thick lead tones with lots of sustain.
Tone (All Models)
Unlike other single tone controls on other amplifiers, which act merely as a treble roll off,
this control works in a different way. It is a dual gang potentiometer which controls two
functions simultaneously. In the fully anti-clockwise position the midrange is dominant in
the sound, turning the control clockwise decreases the mids while at the same time
increasing the higher frequencies.
Start with it in the 12 o'clock position and try different settings with or without the
BRIGHT switch to find the settings that you like. Bear in mind that as the VOLUME is
turned up the BRIGHT switch has less effect.
Reverb ("Goldtone" GA-15RV only)
This single control is for adjusting the amount of reverb effect in the sound. The effect is
produced by a three spring reverb tray inside the cabinet.
Reverb ("Goldtone" GA-30RVS only)
This single control is for adjusting the amount of reverb effect in the sound. The effect is
produced by a three spring reverb tray inside the cabinet. However, due to a simple but
extremely effective modification to the signal between the reverb tray and the stereo
power stages, what you actually hear is a huge pseudo-stereo reverb that seems to fill the
whole room. It is even more noticeable when using extension cabinets.
Footswitch Socket ("Goldtone" GA-15RV only)
This socket is for connecting to a latching footswitch and allows the user to turn the
reverb effect on or off during performance.
Footswitch Sockets ("Goldtone" GA-30RVS only)
These sockets are for connection to latching footswitches. The first one is dual function
and operates the extra gain stage (with VOLUME pulled out) and reverb. The second
turns the effects loop on or off if used.
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