tion. This input is ideal for rack and patch-bay applications, especially if you use other
signal processors or multi-track recorders before the SansAmp RBI. Note: Whenever
you plug into the front panel’s Input, the rear panel Input 2 is disconnected. Also, you
can set the Input level selector switch to its 0dB position when you plug in extra-hot
signals, such as the output from active bass guitars.
Level Selector Switch
This switch lets you connect the SansAmp RBI to a wide variety of equipment with a
variety of signal levels. It has two positions:
0dB position.
Optimizes the rear panel Input 2 to receive an instrument level sig-
nal. In this position, Input 2’s sensitivity is exactly the same as the front panel’s Input.
-20dB position.
Set the switch in this position when sending a line-level signal
into the SansAmp RBI. When the switch is in this position, the signal coming into the
unit is padded down by 20dB.
EFFECTS LOOP
Send and Return
The Effects Loop allows you to connect external effects with the SansAmp RBI. Connect
the input of your processor to Send; output of your processor to Return. Note: When
nothing is plugged into the Effects Loop, the signal passes through from the SansAmp
RBI to the Output jacks, with both the SansAmp 1/4” and XLR Outputs receiving the
same signal.
Mix 50/50 Switch
The 1/4" Send routes 100% of the SansAmp RBI’s signal through your effects processor
when the 50/50 switch is disengaged. If you engage the 50/50 switch, then 50% of the
SansAmp RBI signal goes through your effects processor, and the other 50% passes
directly to the SansAmp 1/4" and XLR Outputs.
To preserve the signal integrity of the SansAmp RBI, use the Effects Loop with the Mix
50/50 switch engaged. When the SansAmp RBI is in this mode, the effects processor’s
mix control should be set at 100% wet. Your relative wet/dry mixture can then be con-
trolled by increasing or decreasing the effects processor’s output level.
UNIVERSAL OUTPUT SECTION
The output sections of the SansAmp RBI are designed to be compatible with any appli-
cation. The outputs can be used for full range (multi-track recorders, studio monitors,
P.A. systems) or limited range systems, as well as
simultaneously. Note: You can com-
pensate for different frequency responses of speaker enclosures by using the Treble
control.
1/4” SansAmp Output
Carries the signal from the SansAmp RBI, including any effects that are placed in the
Effects Loop.
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1/4” Uneffected Output
Buffered output without processing. Sends a direct bass signal to another channel on
your amp, pre-amp, or effects chain, or it can be utilized as a tuner output.
SansAmp XLR Direct Output
Carries the signal from the SansAmp RBI, including any effects placed in the Effects
Loop. For recording, the SansAmp XLR Output is like having a built-in direct box.
Designed without a transformer, it provides a balanced, low-impedance output of
extremely high quality for recording or interfacing with professional-quality signal
processors. Go direct to the board and get the same sound you hear coming out of the
speakers right onto tape or disc. The SansAmp circuitry not only captures the warm,
rich, natural harmonics and sweet overdrive characteristics inherent to tube amplifiers,
its speaker emulation encompasses all aspects of multiply-miked tube amp rigs.
For live gigs, you can use this output direct into the P.A. system and you won’t need a
microphone in front of your amp. And you won’t have to subject the audience to a
sterile, muddy, or boomy bass tone.
If you experience hum from the
output when there’s no instru-
ment plugged in, you most likely
have a ground loop. Therefore,
Pin 1 (signal ground of the
SansAmp XLR) needs to be lifted
or disconnected. You can easily
make a small ground disconnect
adapter by disassembling one
end of the cable and cutting
Pin 1 (the shield connection) as
shown to the right.
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