Marine Amplifier: The Kicker KXM400.4 marine amplifier's special
weather-resistant features allow it to withstand the harsh marine environment and
give you dependable performance. The internal circuit board has been sprayed with
a moisture-deterring, protective conformal coating for water and dirt resistance.
The power, speaker, and input connections are gasket-sealed, as is the cover
hiding the control settings, creating a water-resistant barrier to key components.
Stainless steel mounting hardware prevents rust stains, and the UV-treated chassis
finish battles harsh sunlight.
Class D Amplifier Design: The full-range Class D amplifier uses
digital switching to amplify audio signals, resulting in high efficiency and less
heat. The Class D design also allows a small footprint for increased cargo space.
CEA-2006 Compliant: CEA-2006 is a system of testing and
measurement methods for mobile audio amplifiers. This voluntary standard
advocates a uniform method for measuring an amplifier's RMS power output
and signal-to-noise ratio. The criteria for measuring power uses a DC input
voltage of 14.4 volts and the RMS power output is measured into a 4Ω
load, with 1% or less Total Harmonic Distortion plus noise (THD+N), and over
a frequency range of 20 Hz to 20 kHz (for full range amplifiers). Signal-to-Noise
ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt
into 4Ω. CEA-2006 allows consumers to compare amplifiers on an equal basis.
Using CEA-2006 criteria, the Kicker KXM400.4 is rated at 50 Watts RMS x 4 channels
with a 75 dBA signal to noise ratio.
Specifications: The manual also lists these non CEA-2006
- 2Ω: 100 watts x 4 channels (no
more than 1% THD+N, 14.4 volts)
- Bridged: 200 watts x 2 channels (into
4Ω with no more than 1% THD, 14.4 volts)
- Signal to Noise Ratio: 95 dB (at rated
Kicker Livin' Loud Certified Power: The amplifier comes with
a certificate that indicates the total maximum RMS power output of the particular
amplifier, along with the model number, serial number, and whether the amplifier
passed the total harmonic distortion, signal-to-noise ratio, and protection
Protection Circuitry: The KXM400.4 has protection circuitry
that will turn the amp off in the event of overheating, over voltage (power
input), under voltage (power input), and short circuit (speaker output). If the
Protection LED on the front side of the amp illuminates red, the protection
circuit has engaged and the amp will not play until the problem is resolved.
Gain: To accommodate the varying range of signal levels coming
from today's factory and aftermarket radios, the Kicker KXM400.4 features adjustable
gain controls (low level: 125mV-5V, high level: 250mV-10V). The front and rear
sections of the amplifier (labeled Amp 1 and Amp 2) have independent rotary gain
controls, labeled from 0 to 11.
Input Level Switch: Set the input level switch to Lo when
using preamp level input signals and Hi when using speaker level input signals.
Crossover: The front and rear sections of the amplifier
have independent crossover circuits:
- Amp 1:
- Mode: three position switch;
Off (crossover bypassed), HP (high-pass), or LP
- Range: two position switch;
sets the frequency adjustment range for the crossover
point dial; 1x (10-500 Hz) or 10x (100-5,000 Hz)
- Frequency: continuously variable
from 10 to 500 Hz (with Range switch in the 1x position)
or 100-5,000 Hz (with Range switch in the 10x position)
- Amp 2:
- Mode: four position switch; Off (crossover
bypassed), HP (high-pass), LP (low-pass), or BP (band-pass, both
high-pass and low-pass circuits engaged)
- Range: two position switch; sets the frequency
adjustment range for the low-pass crossover point dial; 1x or 10x
- High-Pass Frequency: continuously
variable from 10 to 500 Hz
- Low-Pass Frequency: continuously
variable from 40 to 500 Hz (with Range switch in the 1x position) or
400-5,000 Hz (with Range switch in the 10x position)
KickEQ: The amplifier's KickEQ bass boost circuits are
continuously variable from 0 to +18 dB and centered at 40 Hz. The front and
rear amps have separate bass boost controls.
Auto Turn-On: The Auto Turn-On switch offers three options:
- +12 V: The amp turns on when +12 volts
is applied to the remote terminal.
- DC Offset: The amp turns on when a
6 volt offset is detected on the signal inputs (from a
- Audio: The amp turns on when an incoming
audio signal is detected
Fader: When your source unit has discrete front and rear
outputs, set the fader switch to on. Turn the fader switch off to send a single
stereo input to both the front and rear amps.
Power Connections: The power and ground connections are
set-screw terminals that will accommodate up to 4-gauge wire. The remote turn-on
set-screw terminal will accept up to 8-gauge wire. The included Allen-wrench is
required to loosen/tighten the terminals.
Note: The Amplifier is not equipped with
an internal fuse. An external 60-amp fuse (not included)
must be installed on the power wire. If the system has
only this amp and a wiring kit is used that includes a
fuse with a value other than 60-amps, the original should
be replaced with a 60-amp fuse.
Speaker Outputs: The Kicker KXM400.4 is equipped with four
pair of set-screw speaker output terminals. The terminals will accommodate up to
8-gauge wire and are loosened/tightened with the included Allen-wrench.
Dual Sensitivity Inputs: The KXM series amplifiers have dual
input sensitivity differential RCA inputs, which will accept either speaker-level
(high) or preamp (low) signals from your source unit. A high-level signal can be
run from the head unit's speaker outputs to the stereo RCA inputs of the amplifier
using Speaker Wire to RCA adapters
sold separately). The Input Level Switch on the amp should be set to high when
using a speaker-level input, and low when using a line-level input.
Line Level Output: The amplifier has a pair of RCA line level
outputs for feeding another amplifier. This is the same signal that is present at
the amp's inputs. Either input method (speaker-level or RCA) will provide a low-level
output signal to the RCA outputs. The amplifier's crossovers have no effect on the
line level output signal, however, if you input a filtered signal from the head unit,
the amp's low-level output will also be filtered.