Hi Jason;
PLEASE UNDERSTAND THAT THE
ANIMAL I'VE PICTURED HERE
IS A GUITAR AMP (By Vox)! ! !
However ...
If you look at the lower left
you'll see a selector switch
with (4) positions from which
to choose.
This allows one to 'crank the
most tubage gain', and yet
manage the output volume by
way of the master volume knob.
[ master volume knob not pictured here ]