Overview: Kicker KX Series amplifiers combine a small
footprint and sleek design with ample power to drive your car's speakers and
subwoofers. New technology onboard lets you easily
set the gain and maximize the output. KX amplifiers feature FIT2 (Fail-Safe
Integration Technology) circuitry to let you connect the amp to virtually any
Power Output: The KXA800.5 is a 5-channel amplifier designed
to power up to two pairs of speakers and one or more subwoofers in your vehicle.
The full range speakers are driven by Amp 1 and Amp 2, and the subwoofer is
driven by the Sub Channel Amp. The
amplifier provides the following power output:
- Amp 1 and Amp 2:
- 50 watts x 4 RMS at 4Ω stereo (≤1% THD+N, 14.4V)
- 100 watts x 4 RMS at 2Ω stereo (≤1% THD+N, 14.4V)
- 200 watts x 2 RMS at 4Ω bridged mono (≤1% THD+N, 14.4V)
- Sub Channel:
- 200 watts x 1 RMS at 4Ω mono (≤1.5% THD+N, 14.4V)
- 400 watts x 1 RMS at 2Ω mono (≤1.5% THD+N, 14.4V)
- +/- 10% (of 2Ω operation) x 1 RMS at 1Ω mono (≤1% THD+N, 14.4V)
Gain Matching: The Kicker KXA800.5 makes it easy to set the
input gain through a procedure called Gain Matching. The goal is to match the
output of the source unit to the input level of the amplifier. The amp features
self-illuminating gain control knobs for the front, rear, and sub channels that indicate when the amplifier is clipping,
allowing you to properly set the gain. Kicker recommends setting the gain using
test tones for
SHOCwave: The SHOCwave (Sub Harmonic Octave Creation)
feature can restore low frequencies that are lost due to compression in digital
music files or in older recordings. Using the KXARC remote, you can adjust the
SHOC level until the low frequencies are satisfactory. For the effect to work
properly, the subwoofer channel must be operating with a full-range signal.
KXARC: The amplifier includes the KXARC wireless remote
control that connects via Bluetooth. Not only can you adjust the amplifier gain,
you can also set the phase (0° or 180°), control the SHOCwave feature, and
monitor the amplifier's output for clipping. The remote features a rotary dial
with a push button action to activate the indicated selection. The KXARC is
powered by a CR2450 cell battery, and can control up to four amplifiers
Controls: The controls for the amplifier are located on the
side of the amplifier behind a protective drop-down door. A 4mm Allen wrench is
provided for gaining access to the controls. There are separate controls for Amp
1 (front channels), Amp 2 (rear channels), and the Sub channel. The controls include:
- Gain Control: The rotary Gain Controls let you match the output of the source unit to the amplifier. When
setting the Gain, you should turn the source unit up to about 3/4 of the
maximum volume, adjust the gain until the LED on the Gain Control
illuminates (or audible distortion can be heard), and then
back the gain down slightly.
- Crossovers: The amp has rotary controls for
setting the crossovers for Amp 1, Amp 2, and Sub channel. The crossovers have a
- Amp 1: The Amp 1 crossover can be set to high-pass,
low-pass, or full-range (off) operations. The cutoff frequency can be set
between 10Hz and 500Hz or between 100Hz and 5000Hz with the 1x/10x range
switch set to 10x.
- Amp 2: The Amp 2 crossover can be set to high-pass,
low-pass, band-pass, or full-range (off) operations. The high-pass cutoff
frequency can be set between 10Hz and 500Hz or between 100Hz and 5000Hz. The
low-pass cutoff frequency can be set between 40Hz and 500Hz or between 400Hz
and 5000Hz with the 10x range switch setting.
- Sub Channel: The Sub channel offers a 40-500Hz Low-Pass
filter, and a 10-80Hz Subsonic filter. The Subsonic filter provides a cutoff
point for lower frequencies that could potentially damage your speakers.
These low frequencies may cause over-excursion in the drivers and waste
- KickEQ Bass Boost: The KickEQ Bass Boost
features a rotary control to set the level between 0dB and 18dB at a center
frequency of 40Hz. Separate KickEQ controls are provided for Amp 1, Amp
2, and the Sub channel.
- Fader/Sub Input: You can feed an audio signal to the amplifier
with three sets of inputs (front, rear, and sub), two stereo inputs (front
and rear), or a single stereo input. The
Fader button should be set to On for two sets of inputs, and Off to drive
all channels with a single input. The Sub Input button should be set to Amp2
if the sub channel is being fed the signal from the rear channels, or Sub if
there is a dedicated sub channel input.
- Radio Detect: If you are sending a high-level input
signal to the amplifier, but the amp cannot detect it, the Radio Detect
feature adds a load resistor to the inputs to tell the source unit that
speakers are present. Radio Detect should not be used when using low-level
Auto Turn-on: The amplifier has three Auto Turn-on modes: +12V,
and DC Offset. The preferred auto turn-on method is to run an 18-gauge wire from
the remote turn-on lead of the source unit to the Remote (REM) terminal on the
amp. When a +12V signal is detected on the wire, the amplifier will turn on. If
your source unit lacks a remote turn-on lead (a factory head unit, for example),
you can choose to turn on the amplifier via the signal sense or DC Offset method.
When the incoming audio signal from the source unit is detected, the amplifier
automatically powers up. When a 3V DC
offset is detected on the source unit's speaker outputs, the amplifier
automatically turns on. You can select the Auto Turn-on method via a 3-way
Radio Detect: This Kicker amplifier is equipped with a Radio
Detect function that works with some factory radio systems. If you have
connected Hi-level inputs to the amplifier, but the source unit cannot detect an
audio system present, or will not play audio out of one or more speakers, you
may need to engage the Radio Detect feature. Pressing in the Radio Detect button
activates a load resistor at the amplifier's inputs to help the head unit detect
that there are speakers present. The Radio Detect feature should not be used if
you are using low-level inputs because the input signal level is greatly
Connections: The KXA800.5 has set screw terminals for power,
ground, and turn-on lead (REM). The power and ground terminals will accept up to
4-gauge wire (4-gauge is recommended), and the turn-on lead will accept up to 8
gauge (18-gauge recommended). The set screws can be loosened/tightened with the
supplied 3mm Allen wrench. The speaker outputs are set-screw terminals as well,
and capable of accepting up to 8-gauge speaker wire. Three pairs of RCA jacks are
provided -- one pair each for the front (Amp 1), rear (Amp 2), and Sub input signals. The RCA inputs will receive either high or low level signals from your
source unit. If you are using a high level signal, you can connect the source
unit's speaker wires to optional Kicker
speaker-to-RCA adapters, or splice the speaker wires to a male RCA plug.
External Fuse: The amplifier does not include a built-in
fuse, therefore an external fuse should be placed on the power wire, within 18"
of the battery. It is recommended that a 4-gauge amplifier wiring kit and a 100A
external fuse be used when installing the amplifier.
Note: Kicker will extend the standard warranty by an
additional year (for a total of three years) when a qualifying
Kicker Installation Kit is purchased with the amplifier.
Certified Power: Each amplifier is tested when it comes off
of the assembly line. Tests are run for Total Harmonic Distortion,
Signal-to-Noise Ratio, Protection Circuit, and Total Power Output. A Certified
Power certificate with model and serial number is included with each amp with
the measured power output figure, and a pass/fail grade for the other tests.