Ruby Red Booster (RRB)
is a combination of
two boosters and a switchable buffer.
The boosters are based on the BJF Little Red
Trebler and Red Rooster Booster, connected in
that order and with a master volume control.
You can use the pedal as a treble booster, a clean
boost or an overdrive unit or any combination of
the above. Also it can be used with or without the
buffer.
The Treble Booster is a fi ne-tuned booster for just
the right treble frequency with carefully designed
bandwidth and an optimized slope of bass cut.
The booster circuit is designed to overdrive
the amplifi er inputs from nice shimmer to heavy
overdrive, thanks to the massive 40dB of boost.
The booster is tuned so that it produces musical
distortion by itself on higher boost settings.
You can control the total level of the two boosters
with the Master Volume control and also use the
Master Volume to achieve distort-ion from the unit.
The controls are:
• MASTER
– this is a volume control that is
located directly after the booster circuit and
when set to max it is just a resistor to ground.
This control sets the fi nal output and it can be
used to control the output when the pedal is used
for overdrive (Boost turned up).
• TREBLE
– set treble boost from zero to about
15dB. The treble frequency and bandwidth are
carefully tuned with an optimized bass slope.
• BOOST
– the gain of the booster and can be set
from unity to about 40dB of boost. When this
control is cranked the unit will distort within itself.
• BUFFER
– inside the pedal there is a switch for
a high quality buffer. You can set the pedal for true
bypass mode or “buffer on” in bypass mode.
We recommend using a buffer in your signal chain
to help with the treble and gain loss from using
many pedals and/or long cables.
MAD PROFESSOR - RUBY RED BOOSTER - OWNER’S MANUAL
The Mad Professor RRB Buffer is an amplifi er
with a voltage gain of exactly 1x (times).
The RRB buffer output impedance is set a little
lower than the Dc resistance of a standard guitar
pickup to equalize the effect of following load
impedance. Input impedance is set at 500K for a
medium load to standard guitar pickups. This
keeps the tone and guitar volume taper natural.
Settings:
Treble boost:
Set Boost to minimum and Master
to maximum and adjust for desired treble boost
with the Treble knob.
Straight boost:
Set Treble to minimum and
Master to maximum and adjust Boost to desired
effect.
Distortion:
Set Boost to maximum and adjust
output level with Master to unity, then adjust Boost
for desired depth and overdrive. Treble can be
used to enhance distortion effect.
C A U T I O N !
Never operate the unit with its bottom removed
or damage will most likely occur.
Off
On
Pedals are shipped “buffer on”: