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5
ULTRACOUSTIC ACX450/ACX900/ACX1800
The MIC jack is the balanced XLR microphone input of the
microphone/line channel.
The balanced LINE jack (1/4") of the microphone/line
channel can be used for line-level signals, e.g. from
keyboards, drum computers, etc.
The COMPRESSOR controller is used to adjust the
intensity of the compression (only in ACX1800, see
chapter 4.3).
The compressor is switched on/off with the IN/OUT
switch (only in ACX1800).
With the FX SELECT controller, you can select one of
16 effect programs. For a detailed description of the
available effects, see table 4.1 in chapter 4.2.
With the PARAMETER controller (only in ACX1800) you
can edit certain effect parameters. For details on the
parameters that are adjustable for each effect, see
table 4.1.
The IN/OUT switch (not included in ACX450) allows you
to activate the selected effect. If an effect has been
activated, the LED in the switch is on. Alternatively, you
can switch the selected effect on and off with the foot
switch.
The FX LEVEL controller is used to adjust the level (share)
of the selected effect.
With the MASTER controller, you can adjust the overall
volume of the ACX1800.
The PHASE switch reverses the phase of the mix signal
by 180° (only in ACX1800). Use this switch to eliminate
problems with feedback.