Rocktron VooDu Valve Online User Manual page 23

The SPEAKER SIMULATOR function is included in all presets and provides a
realistic approximation of a miked speaker cabinet for applications involving connecting
the Voodu Valve directly to a mixing board, recording system or other full range system.
When a preset is recalled which has the Speaker Simulator on for either the left
channel or both channels, the front panel SPKR SIM LED will light.
Note: The parameters provided in this function are operational only when the SPKR
SIM parameter under the Global function is stored UNLOCK, LOCK L or LOCK B.
The PARAMETER SELECT control will allow you to access these SPEAKER SIMULATOR
SPKR SIM I/O The SPEAKER SIMULATOR parameter allows you to select whether
the Speaker Simulator is on for BOTH outputs, on for only the LEFT
output or OFF.
SPKR TYPE The SPEAKER TYPE parameter determines the type of speaker to be
simulated. 15",12",10", 8" and full range speakers are available.
MIC PLACEMENT The MIC PLACEMENT parameter simulates a microphone placed
anywhere from the center of the speaker cone out to the edge of the
cone. Positive parameter values simulate moving the microphone
toward the center of the speaker, while negative values move it to the
edge.
REACTANCE The REACTANCE parameter simulates the characteristics of the the
interaction between a tube amplifier and a guitar speaker cabinet. The
higher the parameter value selected, the more these characteristics will
be apparent. Negative values of reactance can be used to simulate an
open-back cabinet.
parameters: