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OPERATION
AUTO
TURN ON
INPUT
LEVEL
BASS
BOOST
X-OVER
FREQ
L
R
GAIN
+12V DC AUDIO
OFFSET
LO
HI
XOVER
HI LOOFF
120
200
50
11
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INPUT
Automatic Turn-On Selection: The DX series offers three different automatic turn-on modes that can be
selected on the end panel; +12V, DC Offset, and Audio. Using either the DC Offset or Audio mode causes the
REM terminal to have +12V out for turning on additional amplifi ers.
• Remote Turn-On: Set the switch to +12V to use the remote turn-on lead from your source unit. 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: If Remote Turn-On is not an option, the next best setting is DC Offset. The DC Offset
mode detects a 6V DC offset from the HI-Level speaker outputs when the source unit has been turned on.
• Signal Sense Turn-On: The Audio setting is the fi nal alternative for Automatic turn-on. This is a Signal Sense
turn-on method that detects the incoming audio signal from your source unit and automatically turns on the
amp. This turn-on method will not work properly if the input gain control is not set appropriately.
Input Level: The RCA inputs on KICKER DX 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 DX300.2 allows you to adjust the crossover
frequency from 50–200Hz. The setting for this control is subjective; 80Hz is a good place to start.
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 DX300.2 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. The DX125.2 uses a switch to select between 0dB
and +9dB of bass boost at 40Hz.
2011 DX Stereo Amps RevD.indd 52011 DX Stereo Amps RevD.indd 5 11/3/2010 12:29:30 PM11/3/2010 12:29:30 PM