Polarity Switch; Ground Lift Switch - Peavey Dark Matter DM 115 Sub Operating Manual

REAR PANEL TOP
TOP – OPERATING CONTROLS, INPUTS & OUTPUTS
INPUT (4)
The line-level input is of the medium impedance balanced type. The jack is a combo female XLR and 1/4" TRS
connector.
LED (5)
Illuminates GREEN when the power switch is on and power is present
It turns RED when the power amp engages the DDT
but not a constant illumination, or distortion will be excessive.
There is also an LED visible on the front baffle of the Sub that illuminates BLUE when power is applied, and
turns RED when the power amp engages the DDT "soft limiting" circuitry.
LEVEL (6)
Controls the gain or output level of the input signal. It is used to directly set the system output level for a given
input signal.
Normal usage is with the knob set to half-way, this is then equivalent in gain to a typical power amp input.

POLARITY SWITCH (7)

Provides either 0 degrees or 180 degrees sub woofer polarity
This switch is used on conjunction with the Crossover Frequency Control (9) to provide for the best match
between the Subwoofer output and the satellite speaker output in the crossover region.

GROUND LIFT SWITCH (8)

Provided for lifting cable shield from chassis ground, to break potential ground loops and reduce hum.
5
6
7
4
8
™ "soft limiting" circuitry. Occasional flashing is acceptable,
9
11-12
13
10