Mesa/Boogie BIGBLOCK Big Block 750 - Manual (Page 11)

FRONT PANEL CONTROLS:
(Continued)
O.D. MASTER: This control, like the OVERDRIVE, is designed to help you think outside the box. It provides an independent
volume control for the OVERDIVE mode, allowing you to preset the level of the overdriven sound and footswitch to it for specific parts.
The O.D. MASTER is only active when the Footswitch is connected to the Rear Panel
FOOTSWITCH jack. This control gets its feed from the OVERDIVE, GAIN and entire Tone Con-
trol Array and allows you to either increase or decrease the playing volume relative to the Clean
(normal) mode.
This is especially important because overdriven sounds are more compressed than clean sounds
and as greater amounts of overdrive are added, it will compress the signal more, making the
relative volume to the normal mode seem lower.
NOTE: The OVERDRIVE LED will illuminate when the OVERDRIVE mode is activated with the Footswitch indicating that both the
OVERDRIVE and O.D. MASTER are in the signal path and active.
POWER SWITCH: This switch delivers the A.C. power to the BIG BLOCK 750. Make sure the unit is grounded (all three
terminals of the A.C. power cord must be connected whenever possible to avoid injury to the user as well as to the amplifier). Also,
make sure that the proper voltage requirements are present at the A.C. wall socket receptacle.
NOTE: As a reminder, never alter the A.C. power cord in anyway for possible damage to the
amplifier may occur not to mention the possibility of a fire outbreak.
Now that we have reviewed the features and controls on the Front Panel, let’s take a spin
around back and review the interfacing connections.
PAGE 7
REST AREA
O.D.MASTER
AC OFF
OVERDRIVE
O.D.MASTER
AC OFF
OVERDRIVE