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Operation
Your Kicker ZX.2 series amplifier has three rotary controls on top and one switch on the end-panel.
Before turning on the system for the first time, turn the three rotary controls on the top of the amplifier
to the full counter-clockwise position.
1. CrossoverSwitch The crossover switch on the end-panel is for setting the internal crossover. In
the OFF position the amplifier passes
a full-range signal to the speakers.
Use the LO position when connected
to a subwoofer. The HI position
should be selected when connected
to speakers, which you do not want
to receive any sub-bass information.
Never change the crossover
"OFF/HI/LO" switch setting with the
audio system on! See Figure 1.
2. InputGainControl The input gain control is not a volume control. It matches the output of the
source unit to the input level of the amplifier. 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 amplifier up until you can
hear audible distortion, then turn it down a little.
3. BassBoostControl The bass boost control is designed to give you increased output 0 - 18dB
at 40 Hz. The setting for this control is subjective. If you turn it up, you must go back and adjust the
input gain control to avoid clipping the amplifier.
4. CrossoverControl The setting for this control is subjective; 80Hz is a good place to start.
5. RemoteBass(Level Control) When the crossover on your ZX.2 series amplifier is set to LO pass,
you have the ability to control the output level of the amplifier remotely. To mount the remote bass level
control, simply screw the metal
bracket to the chosen location. Then
slide the housing onto the bracket
until it snaps into place. Run the
cable from the controller to the
"Remote Bass" jack on the amplifier
chassis.
Slide the housing until it snaps into the metal bracket
TroubleShooting
If your amplifier does not appear to be
working, check the obvious things first
such as blown fuses, poor or incorrect
wiring connections, incorrect setting of
crossover switch and gain controls, etc.
There are two LEDs on the top of your
Kicker ZX series amplifier, one green and one red. When the green LED is lit this indicates the amplifier is turned on
and no trouble exists. If the green LED turns off and the red LED is lit, this indicates that the protection circuitry (SORT)
is engaged.
Green LED off, no output? With a Volt Ohm Meter (VOM) check the following: 1) +12 volt power terminal
(should read +12V to +16V) 2) Remote turn-on terminal (should read +12V to +16V) 3) Check for reversed power
and ground connections 4) Ground terminal, for proper conductivity.
Green LED on, no output? Check the following: 1) RCA connections 2) Test speaker outputs with a "known"
good speaker. 3) Substitute source unit with a "known" good source unit. 4) Check for a signal in the RCA cable
feeding the amplifier with the "AC" test position selected on the VOM meter.
Red LED on, no output? 1) Amplifier is very hot.
the speaker terminals with a VOM meter (see the diagrams in this manual for minimum recommended impedance and
multiple speaker wiring suggestions). Also check for adequate airflow around the amplifier. 2) Amplifier shuts down
4
Figure 5
Crossover Control
Input Gain Control
50 - 200Hz, 12dB/Oct
Low Level: 125mV - 5V, High Level: 250mV - 10 V
Mount the metal bracket
Side View
L
R
L
R
HI-LEVEL
INPUT
OFF HI LO
+ - - +
XOVER
INPUT
OUTPUT
L+
L-
R+
R-
REMOTE BASS
Thermal protection is engaged. Test for proper impedance at
ZX.2AMPLIFIER
only while vehicle is running.
volt operating range. Have the vehicle's charging and electrical system inspected. 3) Amplifier will only play at low
volume levels.
Short circuit protection is engaged. Check for speaker wires shorted to each other or to the vehicle
chassis. Check for damaged speakers, or speaker(s) operating below the minimum recommended impedance.
No output from one channel? 1) Check the balance control on source unit 2) Check the RCA (or speaker input)
and speaker output connections for the channel 3) Swap the RCA (or speaker input) cable from left to right. If the
problem changes sides then you have a bad RCA (or speaker input) cable or source unit problem. 4) Swap the
speaker output wire from left to right. If the problem changes sides then you have a bad speaker cable, passive
L-
crossover network and/or speaker.
Alternator noise-whining sound with engine's RPM? 1) Check for damaged RCA (or speaker input) cable
2) Check the routing of RCA (or speaker input) cable 3) Check the source unit for proper grounding 4) Check the
L+
gain settings and turn them down if they are set too high.
Poor stereo image or reduced bass response?
to right. If there is more bass output when turned to either side, then check your speaker wiring, passive crossover
networks and speaker terminals for proper positive and negative connections. Reverse a speaker connection from
positive to negative on the stereo/subwoofer channel(s); if the bass improves, the speaker was out of phase.
Bass Boost Control
If you have more questions about the installation or operation of your new KICKER product, see the Authorized
0 to +18dB boost @ 40Hz
KICKER Dealer where you made your purchase. For more advice on installation, click on the SUPPORT tab on the
Kicker homepage, www.kicker.com. Choose the TECHNICAL SUPPORT tab, choose the subject you are interested in,
and then download or view the corresponding information. Please E-mail support@kicker.com or call Technical
Services (405) 624-8583 for unanswered or specific questions.
Please Note: Modern high performance speakers have a lower DC Resistance than what used to be available. The Kicker Coaxial and
Component speakers are rated at four ohms (some DC Resistances may be as low as 3 ohms) and work with any amplifier designed to
operate at a four ohm load. If you want to use two Kicker Coaxial or Component speakers on a single channel of your amplifier wire the
speakers in series. This will improve the sound quality, lower the total harmonic distortion and lessen the thermal load at the amplifier. This
may prevent an amplifier from shutting down, due to over-current protection circuitry.
CAUTION: When jump starting the vehicle, be sure that connections made with jumper cables are correct. Improper connections can
result in blown amplifier fuses as well as the failure of other critical systems in the vehicle.
Performance
Model
Figure 6
RMS Power in Watts, all channels driven
Back View
@14.4V, 4Ω Stereo ≤1% THD+N
@14.4V, 2Ω Stereo, ≤1% THD+N
@14.4V, 4Ω Mono, ≤1% THD+N
Length:
Specifications common to all models:
Height:
Width:
Frequency Response, ± 0.5 dB:
Signal-to-Noise Ratio:
Input Sensitivity:
4 Conductor
Phone Cable
Electronic Crossover:
Bass Boost:
Voltage protection circuitry is engaged. Voltage to the amplifier is not within the 9-16
Check system phasing by turning the balance control from left
ZX350.2
ZX450.2
ZX550.2
110 x 2
150 x 2
205 x 2
175 x 2
225 x 2
275 x 2
350 x 1
450 x 1
550 x 1
13 1/2" (342mm)
16 3/4" (425mm)
20" (507mm)
2 1/8" (54mm)
9 5/8" (244mm)
20 Hz - 20 kHz
>95 dB, a-weighted, re: rated power
125 mV - 5 V low level, 250 mV - 10 V high level
Variable HI, LO or OFF (bypass), 50 - 200Hz, 12dB per octave
Variable 0 to +18 dB boost @ 40 Hz
Model ZX350.2
110 x 2 @ 4 ohms, 14.4Vdc, 1% THD, CEA-2006 (Watts)
Signal to Noise Ratio -98 CEA-2006 (ref: 1W, A-weighted)
Model ZX450.2
150 x 2 @ 4 ohms, 14.4Vdc, 1% THD, CEA-2006 (Watts)
Signal to Noise Ratio -95 CEA-2006 (ref: 1W, A-weighted)
Model ZX550.2
205 x 2 @ 4 ohms, 14.4Vdc, 1% THD, CEA-2006 (Watts)
Signal to Noise Ratio -95 CEA-2006 (ref: 1W, A-weighted)
Model ZX850.2
295 x 2 @ 4 ohms, 14.4Vdc, 1% THD, CEA-2006 (Watts)
Signal to Noise Ratio -93 CEA-2006 (ref: 1W, A-weighted)
ZX850.2
295 x 2
425 x 2
850 x 1
23 1/4" (590mm)
5
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