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RedPlate RP50DUO Operations Guide
LINE OUT – A line level signal jack derived from the speaker output which contains the whole tone of the amplifier.
Speaker Jacks – The MAIN and EXT jacks are wired in parallel. The MAIN jack must be used first because it has a protection device.
ALWAYS HAVE A SPEAKER CONNECTED TO AVOID PERMANENT AMPLIFIER AND OUTPUT TUBE DAMAGE.
Impedance Selector Ω - Set this to the total impedance of all attached speakers.
SEND and RETURN Jacks – The send jack connects to the input of an external effects device and the return jack connects to the
output of an external effects device. The return jack interrupts the signal path so the external effects unit must mix the wet and dry signals.
Presence Control – The presence circuit uses global negative feedback to remove low frequencies which frees up bandwidth for more
midrange and highs. Think of it as a tone control to balance the relationship between highs and lows, especially when the amplifier is
naturally producing increased low end at louder volumes. The control clicks off when rotated to zero for no presence.
Reverb Control - Sets the amount of reverberation effect, takes the reverb out of circuit when rotated to zero (there will be a slight
volume and tone change).
Footswitch Jack - This is a standard 180 degree 5 pin DIN jack for footswitch connection. If a replacement cable is needed, make sure
all 5 wires are supported. The pinout is conveniently located on the rear panel for use with automated switcher conversion boxes.
Fat/ Humbucker / Single coil Switch – Sets the amount of bass gain in the input of the clean preamp stage, useful for matching the
amplifier to the guitar type.
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