28|  The Piano 
the INTENSITY knob. To return to the original settings, press the SPEED or 
INTENSITY knob.
NOTE: The booster stompbox may produce a very loud signal.
3  If the wah effect is selected, the Auto/Pedal can be used. When the button’s 
LED is off (Auto mode), the wah effect’s filter is set automatically depending 
on the sound and playing dynamics. When on (Pedal mode), you can control 
the filter with an expression pedal connected to the PEDAL 2 connector; if 
no pedal is connected, the wah is set to a fixed frequency.
NOTE: Before using an expression pedal to control the wah, it is advisable to calibrate 
it. See “Calibrating the pedals” on page 41.
PRE FX type SPEED knob INTENSITY knob
Red Comp Sens Level
Treble Boost Drive Level
U-Vibe Speed Depth
Vibrato Type Mix
Tremolo  Speed Depth
VOX Wah Manual Wah Type (V-847, V-848)
NOTE: The Manual Wah control only works when the Auto/Pedal button is in Pedal mode.
Amplifier
With the AMPLIFIER section you can select the model of amp (including 
cabinet). This lets you select from six types of classic amp models, including 
the legendary VOX AC30. Each amp model also includes a cabinet simulator 
that can be edited with the SV-2 Editor.
1  Use the TYPE knob of the AMPLIFIER section to select a different amplifier.
The operating mode of the preamp and power amp, the response of the tone 
controls, and their placement within the circuit will change depending on the 
type of amp you select here, precisely replicating the exact gain and tonal 
character of the original amp. The all-important power amp stage (class A