Mesa/Boogie BIGBLOCK Big Block 750 - Manual (Page 14)

PAGE 10
REAR PANEL CONTROLS:
(Continued)
TUNER: This Rear Panel auxiliary TUNER output is wired in parallel with the Front Panel TUNER output. This provides for Rear
Panel interfacing of rack mount tuners, where it is preferable to have all wiring stay in the rear of a rack
system.
The Footcontroller MUTE switch activates the MUTE feature in both Front and Rear outputs simultaneously.
SLAVE: The SLAVE feature provides a padded signal that is derived from the Speaker Output and captures the entire sound of
the preamp and power section. This is useful for large venue applications, where multiple BIG BLOCK or other slave amplifiers are
strung together for additional power to drive more speaker enclosures.
The SLAVE may also be used as a send signal to feed outboard processing racks in a dry/ wet setup where
processing is done after the
BIG BLOCK 750 and then fed to a Stereo power amplifier for separate control
of the wet sound. This works very well and is similar to what is done in the recording environment where a dry
signal is blended with another channel on the console that is only the processed (wet) version of the same sound.
NOTE: Once a signal has been taken from the SLAVE, you can not feed the signal back into the BIG BLOCK Effects RETURN jack
or INPUT. Doing so will cause a feedback loop resulting in a high pitched squeal, much like a microphone held up to a monitor. You
must go into an external amplifier or device once a signal has been taken from the SLAVE.
NOTE: Always start with the SLAVE LEVEL at 7:00 (off) and increase the level slowly to prevent damage to ears, speakers and the
input stage of external processors.
NOTE: The SLAVE is not optimized for direct interfacing into recording consoles or live mixing boards. For this application it is best to
use the DIRECT OUT.
SPEAKERS: These two sets of outputs are responsible for delivering the mighty power of the BIG BLOCK to your speaker
enclosure(s) of choice. We would like to suggest that if you have not already auditioned one of our many incredible new Bass
Enclosures, that you do so at your earliest convenience. They have been designed to deliver the ultimate tone and maximum power
from your amplifier and we feel confidant that like us, upon hearing them, you will find the competition disappointing.
Two styles of speaker connectors have been provided so that any type of cabinet configuration may be
interfaced with the
BIG BLOCK. NEUTRIK brand “SPEAK-ON” Connectors provide for locking 1/4”
interfacing and all MESA Bass Enclosures will come standard with these additional heavy duty jacks.
In addition the standard 1/4” phone jacks are also supplied for older cabinetry that does not support
these “SPEAK-ON” connectors.
Your BIG BLOCK was designed so that it will deliver its maximum power (750 watts RMS) at an
impedance load of 2 Ohms and it can do so without worry of overheating. However, feel free to use any combination of cabinets with
a combined load above that impedance with no worry of damage to the amplifier. At higher impedance loads (4 or 8 Ohms) overall
power will be diminished, but this works out in your cabinets favor as some cabinets may not be rated to take the full assault of the
awesome power available in the
BIG BLOCK output section.
NOTE: It is possible to use the DIRECT OUT for recording direct to consoles with no load present (no Speaker cabinet connected) on
the SPEAKER OUTPUT without worry of damaging the amplifier.
That covers the features of the BIG BLOCK Rear Panel, and now with the combined understanding of the controls, you should
be able to dial with confidence as you search for your signature sound. We wish you many years of inspiration and musical
fulfillment from your new amplifier. From the entire
MESA Family, CHEERS!
SPEAKER
OUTPUT
SUGGESTED LOAD
2 OHMS MINIMUM
SLAVE
LEVEL OUT
FOOT
SWITCH
TUNER