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CERWIN-VEGA! PROFESSIONAL
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(D) LINK OUTPUT
This is a balanced XLR output that is the sum of the two input channels. This output is not affected by changes to the
Main Volume knob or the custom features. This connection is designed to provide an output which combines both
channels together for connecting to an additional P1800SX.
(E) MAIN VOLUME KNOB & REMOTE VOLUME CONTROL
It is highly recommended to have the volume set to the minimal (MIN) level upon initial system start-up and it can be
adjusted two different ways. On the main volume knob, volume is increased in a clockwise rotation and decreased in a
counter-clockwise rotation. Another method to control the volume is by using the Remote connection (sold separately).
A removable three-terminal jack can be wired over long distances to a remote volume control device with a
corresponding connection.
(F) INDICATORS
Three indicators provide operating condition status on the P1800SX:
1) The POWER indicator (green) will illuminate when power is properly applied to the P1800SX and the main power
switch is ‘ON’.
2) The LIMITER indicator (yellow) will illuminate when the P1800SX automatically reduces the sound output to
prevent damage to the speaker. While the P1800X is producing sound, it is suggested to reduce the volume level
so the LIMITER indicator does not illuminate. Continuing use of the P1800SX while this indicator is illuminated
may result in a protect condition where no sound can be produced. Note, upon initial power up the indicator
will blink. This is normal behavior as it will indicate the firmware version in the unit.
3) The PROTECT indicator (red) will illuminate when the P1800SX automatically places itself into a condition where
sound output is shutoff. This condition may be the result of excessive limiting, an excessive heat condition, or a
low voltage condition. These conditions all can cause significant damage to the product.
(G) CUSTOM FEATURES
POLARITY REVERSE
In situations where the P1800SX is not optimally located, a polarity reverse switch is provided which inverts the phase of
the audio signal by 180 degrees and can improve low frequency performance. In certain situations, the location of the
subwoofer may be out of phase with the full-range speakers. By reversing the polarity of the subwoofer, the phase will
match the full-range with the benefit of not having to relocate the subwoofer.
VEGA BASS BOOST SWITCH
Engaging the VEGA BASS BOOST switch to ‘ON’ adds low frequency gain to the signal and dynamically adjusts the low-
frequency response based on the subwoofer volume level.
HPF THRU & LPF SUB
When turned on, the HPF THRU & LPF SUB switch engages two filters simultaneously:
1) A low pass filter will attenuate frequencies above 80Hz for the P1800X subwoofer.
2) A high pass filter will attenuate frequencies below 80Hz on the THRU 1 & 2 outputs. This is recommended when
using the subwoofer in combination with other speakers such as the P1500X.
FRONT LIMITER LIGHT
Setting the FRONT LIMITER LIGHT switch to ‘ON’ will enable the limiter indicator light on the front of the P1800SX. This
allows the user to see when the limiter is engaged in situations where it needs to be visible such as during a sound
check.