ART Pro Audio 311 - 2way Crossover w/ Subwoofer Out User Manual
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The main crossover filters are 4-pole Linkwitz-Riley designs
(24dB/octave). This yields a sharp rolloff to help protect speakers and
the outputs sum to a flat response.
HIGH OUTPUT LEVEL CONTROL
Each channel of the 311
has a High Output Level control. These
controls are used to trim the output levels to the High Output Jacks on
the rear of the unit.
They cover the range of –30dB to +10dB of output gain trim, as
indicated on the front panel. In most cases you would set them to 0dB,
for flattest response from the Crossover. You can use these controls to
compensate for amplifier gain variations or efficiency of your speakers.
PHASE SWITCH
The Phase switch is used to switch the polarity (invert the phase) of
the signal going to the High Outputs. Normally you would leave this
switch in the Norm position. Putting the switch in the Invert position
may be done to help correct audible phase related problems.
SUB OUTPUT LEVEL CONTROL
This control is used to trim the audio output level to the Subwoofer
Output Jack on the rear of the unit. This signal is used to provide extra
bass via a mono subwoofer in your system.
SUBWOOFER FREQUENCY CONTROL
The Subwoofer Frequency control sets the crossover point for signals
going to the Subwoofer Output. For this function, both of the input
channel signals are combined and frequencies below the set frequency
will be sent to the Subwoofer Output. This is in addition to the normal
signals that are sent to each of the channels other outputs.
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