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audio inputs
OPERATION
Automatic Turn-On Selection: The CX series offers two automatic turn-on modes; +12V and DC Offset.
• Remote Turn-On: Run 18 gauge wire from the Remote Turn-On Lead on your source unit to the terminal
labeled REM between the amplifi er’s positive and negative power terminals. This is the preferred automatic
turn-on method.
• DC Offset Turn-On: The DC Offset mode detects a 6V DC offset from the HI-Level speaker outputs when
the source unit has been turned on.
Input Level: The RCA inputs on KICKER CX amplifi ers are capable of receiving either Hi or Low-level signals
from your source unit. If the only output available from your source unit is a Hi-Level signal, simply press in the
Input Level switch on the amplifi er. Refer to the wiring section of this manual for additional instructions.
Crossover Switch: Use the XOVER switch on the end panel of the amplifi er to set the internal crossover to
OFF, HI or LO. When the switch is set to OFF, a full bandwidth signal will be amplifi ed. Set the switch to HI if
you want the amplifi er’s internal crossover to serve as a high-pass fi lter. Set the switch to LO if you want the
amplifi er’s internal crossover to serve as a low-pass fi lter. Never change the crossover “OFF/HI/LO” switch setting
with the audio system on!
Crossover Control: The variable crossover on the front of the CX300.4 allows you to adjust the crossover
frequency from 50–200Hz. The setting for this control is subjective; 80Hz is a good place to start.
Fader Switch: Depress the fader switch if you are running two sets of inputs (front and rear for example) to the
amplifi er. Leave the fader switch OFF if you want to drive all channels from a single stereo input.
Input Gain Control: The input gain control is not a volume control. It matches the output of the source unit to
the input level of the amplifi er. Turn the source unit up to about 3/4 volume (if the source unit goes to 30, turn it
to 25). Next, slowly turn (clockwise) the gain on the amplifi er up until you can hear audible distortion, then turn it
down a little.
Bass Boost Control: The variable bass boost control on the side of the CX300.4 amplifi er is designed to give
you increased output, 0–12dB, at 40Hz. The setting for this control is subjective. If you turn it up, you must
readjust the input gain control to avoid clipping the amplifi er.
2012 CX 4-Channel Amps Rev F.indd 62012 CX 4-Channel Amps Rev F.indd 6 6/22/2012 2:45:34 PM6/22/2012 2:45:34 PM