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O.D. MASTER:
This control, like the OVERDRIVE, is designed to help you think outside the box. It provides an independent vol-
ume control for the OVERDRIVE 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 OVERDRIVE CIRCUIT is engaged by either pulling the
O.D. MASTER or by connecting the Footswitch and selecting OVERDRIVE. This control gets its
feed from the OVERDRIVE, GAIN and entire Tone Control Array and allows you to either increase or
decrease the playing volume of the OVERDRIVE MODE 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 termi-
nals 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 any way 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.
FrONT PANeL CONTrOLS: (Continued)
O.D.MASTER
AC OFF
OVERDRIVE
O.D.MASTER
AC OFF
OVERDRIVE
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