Features KX.4 Series Amplifier Owner’s Manual Four Channel Models: 2 KX350.4 / KX650.4 / KX850.4 Attention: Congratulations! Please record your purchase information in the area below. We recommend attaching the original sales receipt to this manual for future reference. If you require service on this speaker during the warranty period, you will need to provide this information and a copy of the original sales receipt to Kicker for validation of warranty repairs.
Low Impedance Operation Class A/B stable into 2 ohm stereo or 4 ohm mono loads. Remote Bass Level Control Dash or center console mountable for remote fine-tuning of bass output. SORT Protection Circuitry (Short circuit, Over-voltage, Reverse polarity, Thermal) Protects amplifier from accidents and undesirable operation. EndKaps Cast aluminum, custom, removable covers to protect and hide all your wiring connections to the amplifier. Can be prepped and painted any custom color you choose.
Installation Mounting When selecting a location to mount your Kicker amplifier be sure it is structurally sound and that there are no items behind the area that could be damaged by the screws. Check for brake lines, fuel lines, gas tanks, or wiring harnesses etc. All amplifiers generate heat under normal operation. Be sure to choose a location that allows adequate ventilation for the amplifier. Also consider that the air temperature inside an automobiles trunk can reach upwards of 140 degrees fahrenheit.
Signal can be input into the amplifier using either the low level RCA input connections or the high level (speaker level) connections. Using the low level RCA connections is the preferred method. Use the high level inputs only if your head unit does not have low level RCA type outputs. All four channels will work with only one set of RCA cables, but there will be no fade capability.
Installation RCA Dummy Plugs When using both sets of High Level inputs, RCA dummy plugs must be inserted into the AMP 2 inputs in order for the fader to work properly. If the amplifier is being used in any other configuration do not use the RCA dummy plugs! If you do not have dummy plugs available, simply using raw RCA ends or cutting the ends off of existing cables will be sufficient. See the Amplifier Technical manual for more information.
The following diagrams show the most common configurations for your system. GROUND GROUND REMOTE TURN-ON RR+ LL+ 18" BATTERY 18" RR+ LL+ + - ++ BRIDGED OPERATION (MONO) KX.4 amplifiers are capable of operating into a minimum impedance of 4 ohms in Bridged operation. RR+ LL+ - + + - SIGNAL IN AMP 1 FUSE SIGNAL IN AMP 1 FUSE BATTERY + SIGNAL IN AMP 2 or less +12V SIGNAL IN AMP 2 or less +12V + - RR+ LL+ REMOTE TURN-ON STEREO FOUR CHANNEL OPERATION KX.
Navigation Operation On your Kicker amplifier there are six rotary controls on top and two switches on the end panel. These controls ensure the reliability and performance of the amplifier, so they need to be set correctly. CROSSOVER SWITCHES NEVER CHANGE THE CROSSOVER SWITCH SETTING WITH THE SYSTEM ON! The switches located on the end panel next to the RCA jacks are for setting the internal crossover. In the OFF position the amplifier passes a full range signal to the speakers.
operation Remote Bass Level When using AMP 2 as a subwoofer amplifier you have the ability to control the level of the subs from the driver’s seat. To mount the controller 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 appropriate jack on the amplifier chassis.
Specification Performance MODEL KX350.4 KX650.4 KX850.4 @ 14.4V, 4Ω Stereo, < 1% THD+N @ 2Ω Stereo, < 1% THD+N @ 4Ω Mono, < 1% THD+N 4 x 60 4 x 90 2 x 175 4 x 120 4 x 170 2 x 325 4 x 175 4 x 215 2x 425 @ 12.5V, 4Ω Stereo, 0.085% THD+N @ 2Ω Stereo, 0.5% THD+N @ 4Ω Mono, 0.5% THD+N 4 x 35 4 x 70 2 x 130 4 x 70 4 x 135 2 x 250 4 x 90 4 x 180 2 x 325 22 1/2” (57.15cm) 25 3/4” (65.40cm) RMS Power in Watts, All Channels Driven Length with EndKaps: 16” (40.
If your amplifier does not appear to be working, check obvious things first such as blown fuses, poor or incorrect wiring connections, crossover and gain controls set incorrectly, etc. There are two LEDs on the end panel of your Kicker KX 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.
Trouble Shooting Help Alternator noise (whining sound that varies with engine RPM): Check for damaged RCA cable. Check routing of RCA cable. Check source unit for good ground. Check gain setting, turn down if set too high. Poor stereo image or reduced bass response: Check system phasing by turning the balance control from left to right. If there is more bass output when turned to either side then check your speaker wiring for proper positive and negative connections.
Kicker warrants this product to be free from defects in material and workmanship under normal use for a period of THREE (3) MONTHS from date of original purchase with receipt. When purchased from a Authorized KICKER Dealer it is warranted for TWO (2) YEARS from date of original purchase with receipt.
Notes Notes 14 KX Amplifiers
Notes Pizza Delivery # KX Amplifiers 15