Speaker Mute; Pin 1 Lift / Ground - Mesa/Boogie Buster! Bass 200 Owner's Manual

EFFECTS LOOP: SEND & RETURN (Continued)
wish to use from your processor. The FX BLEND let's you sweep between approximately 10% of the wet signal and 100% of the wet
signal mixed with the dry signal. The best results are usually found with a parallel loop of this kind by setting your effect processors'
output mix control to full wet or effect only (many processors have a separate jack that is only the wet signal or only the dry signal...use
the wet jack in this case.) Then slowly bring up the FX BLEND on BUSTER to the desired blend of effect. You will most likely find that
you don't need a very high setting of the FX BLEND to get plenty of effect.
This scheme works very well because when the FX BLEND is low, you are listening mostly to the rich all tube tone you chose
BUSTER for - and not to the unfriendly gang of op-amps that many processors use for impedance matching and gain in their output
section. Basically, the less of the loops' wet signal you dial in...the more pure your tone will be. This is the advantage of having an
effects loop in parallel with the signal as opposed to one in series with the signal; where the entire tone of your amplifier passes
through the processor.
NOTE: You will notice that there is still some effect ( wet signal ) detectable at the low end of the FX BLEND control ( 10% ). This was
necessary to avoid oscillations that might otherwise occur should a processor with a very small impedance difference between its
Input and Output be interfaced to BUSTERS' loop.
It is also a good practice to keep the processors Input and Output Level Controls ( preferably both ) as close to "unity gain" as possible.
Oscillation between the SEND and RETURN stages in BUSTER could occur which would produce a loud howling sound if this
practice is ignored.

SPEAKER MUTE:

This switch is designed to be used in conjunction with the DIRECT OUTPUT to mute the speaker when going
direct to a console for recording situations. It defeats the signal to the driver stage, thereby protecting the output transfor mer from
damage when there is no load connected to the speaker outputs. Even with this safeguard it is still a wise idea to keep the speakers,
SPEAKER MUTE
EFFECTS
SPKR ON
SEND RETURN
10% 100%
GROUND
FX
BLEND

PIN 1 LIFT / GROUND:

1 of the male 3 pin XLR output. The upper position of the two position mini toggle lifts the ground for PIN 1 - the lower position
connects pin 1 to chassis ground. When you are interfacing to a console for either live or recording, it may be necessary to lift this
SPEAKER MUTE
EFFECTS
SPKR ON
SEND RETURN
10% 100%
GROUND
FX
BLEND
or a load of some kind ( such as a load resistor ) connected at all times to avoid acciden-
tal damage to your amplifiers' output transformer. If after transporting BUSTER you
find that you have no sound upon power-up, check this switch...it may have been bumped
in transit and could be mistakingly set to the MUTE position.
LIFT
DIRECT OUT
PIN 1
This switch is also part of BUSTERS' balanced DIRECT OUT circuit. It lifts ( floats ) the ground for pin
chassis ground to avoid unwanted buzz or hum.
LIFT
DIRECT OUT
PIN 1
Use the FX BLEND control to blend in the desired amount of the effect you
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