Overview: Kicker KX Series amplifiers combine a small
footprint and sleek design with ample power to drive your car's speakers and
subwoofers. The KXA400.1 includes an innovative wireless remote that lets you
control much more than the amp's volume. 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 KXA400.1 is a mono block amplifier designed
to power the subwoofers in your vehicle. The
amplifier provides the following power output:
- 200 watts x 1 RMS at 4Ω (≤1% THD+N, 14.4V)
- 400 watts x 1 RMS at 2Ω (≤1% THD+N, 14.4V)
Note: The amplifier is 1Ω stable with the power rating
equivalent to 2Ω operation, +/- 10%.
Gain Matching: The Kicker KXA400.1 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. A
self-illuminating gain control knob indicates when the amplifier is clipping,
allowing you to properly set the gain. Kicker recommends setting the gain using
test tones for
best results. In addition, you can use the Clip Indicator feature on the
included KXARC remote to identify when the amp is clipping.
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. The controls include:
- Gain Control: This rotary Gain Control lets 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.
- 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
amplifier power. You can set the subsonic filter between 10Hz and 80Hz to
match your speaker's low-frequency capability. The filter has a 24dB/octave
- Low-pass Crossover: The amp has a rotary control for
setting the low-pass crossover between 40Hz and 160Hz. The crossover has a
- KickEQ Bass Boost: The KickEQ Parametric Bass Boost
features three rotary controls for level, center frequency, and bandwidth.
The boost level is variable between 0dB and 18dB, and you can set the center
frequency between 20Hz and 80Hz. The bandwidth of the bass boost is variable
from levels 1 to 5, with the higher bandwidth setting resulting in a sharper
cut at the frequencies above and below the selected center frequency.
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.
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 KXA400.1 has set screw terminals for power,
ground, and turn-on lead (REM). The power and ground terminals will accept up to
4 gauge wire (8-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. Two pairs of RCA jacks are
provided -- one pair for the input signal and another pair for the output
signal. 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. The RCA
outputs can be used to feed the audio signal to another amplifier, if desired.
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 an 8-gauge amplifier wiring kit and a 60A
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.