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Phantom Power is available to each channel input of the BLUETUBE
DP. The 48 volts is supplied by way of the XLR connector for condenser mics and any other devices requiring continuous power through the XLR input. This power is supplied at a constant level allowing use of both inputs simultaneously. PIN 1 GND PIN 2 +48v PIN 3 +48v
XLR connector wiring for Phantom Power Polarity Reversal Switch. This allows the user to invert the polarity of
the XLR connector by switching pins two and three. The inversion of the pins of the XLR connector may be necessary to alter the audio phase of two like microphones to compensate for phase cancellation. It may be required that the wiring of a cable� XLR connector be switched to s successfully utilize Phantom power.
-20dB Pad. This provides -20 decibels of attenuation with the push of a
button. This is a very useful feature for rapidly reducing the level coming into the BLUETUBE DP and thus preventing the input signal from overmodulating (distorting) the input. This may occur due to high output level from a microphone or line device. Padding the input serves to provide increased �headroom� for the operator.
Gain. This control governs the amount of boost to the signal being
processed by the preamplifier. Dynamic mics and instruments without pre-amps will normally require more gain than condenser mics and instruments that have a built-in preamp (care should be taken with instruments having their own built-in preamp not to overdrive the input of the BLUETUBE DP). If you should require more signal out of the pre-
amp for a hotter recording level or to drive an input of some down stream device harder, cranking up the gain should provide all the
