Owner's manual

VoiceBox 4 I/OP
User Manual
 Attero Tech LLC 2010 Page 7 614-00008-02
Figure 9 - Gain and Phantom Power switches
2.2 – Phantom Power and Gain Switches
The VoiceBox has the ability to provide phantom power
and input gain on each input. Switches are provided for
controlling both these features independently on each
input. G1 to G4 are 4 groups of switches controlling
input gain on inputs 1 to 4 respectively. The remaining
four switches, number 1 through 4 are the four phantom
power switches for inputs 1 to 4 respectively.
The two gain switches per input provide a choice of line
level input (0 dB), +30 dB gain, or 50 dB gain. To use a
line level input, ensure both gain switches for that
channel are in the down position. To set +30 dB of input
gain, move the left hand switch of the gain group to the
up position. To set the input gain to 50 dB, move both
switches in the gain group to the up position.
Phantom power enables the VoiceBox 4 I/OP to provide +12 V DC at very low current over the audio input lines to power an
active microphone. With the switch in the down position, (as they all are in Figure 9), phantom power is not enabled. Move
the switch to the up position to activate it.
Note: The positions of the switches for both gain and phantom power are also shown on the back panel itself for easy
reference.