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 determining 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 over the full frequency range
of the amp with 1% or less Total Harmonic Distortion plus noise (THD+N).
Signal-to-Noise ratio is measured in weighted absolute decibels at a reference
of 1 watt. CEA-2006 allows consumers to compare car amplifiers and receivers on
equal footing. Measured under CEA-2006 conditions the Kicker DXA250.4 is rated at
30 watts RMS x 4 channels into a 4-ohm load and the signal to noise ratio is >95
dB. Additional specs listed in the manual (but not listed as CEA-2006 compliant)
include 60 watts RMS x 4 channel into a 2-ohm load (measured using a 14.4 volt
power supply with no more than 1% THD+N) and 95 dB signal-to-noise ratio (measured
at the rated power output).
Auto Turn-On: There are two ways to automatically turn on
the amplifier. Most aftermarket car stereo head units will have a remote turn-on
lead, which can be extended to the amplifier location and connected to the amp's
Remote terminal. If connecting the amplifier to a factory stereo, or a head unit
without a remote turn-on lead, the amp can automatically turn on using the DC
Offset mode. The amp detects a 6-volt DC surge on the signal inputs and turns
the amplifier on. There is no switch on the amp to select the Turn-On method.
Protection Circuitry: The DXA250.4 has protection circuitry
that will turn the amp off in the event of overheating, over voltage (over 16 volt
input), under voltage (under 10 volt input), and short circuit (speaker output).
If the Protection LED on the right side of the amp illuminates red, the protection
circuit has engaged and the amp will not play until the problem is resolved.
Dual Input Sensitivity: The DXA250.4 can receive low- or
high-level signals from your car stereo source unit at the amplifier's left and
right, RCA inputs. The low-level signal can be sent from the source unit's RCA
line-level outputs. In this case, the Input Sensitivity switch on the amp should
be set to "LO". A high-level signal can come from the source unit's speaker
outputs, and connected to the amplifier using the
Kicker KISL adapters. The Input Level switch should be set to "HI".
Fail-Safe Integration Technology (FIT): FIT utilizes isolated
differential inputs, rejecting noise and electrical interference for the quietest
operation possible. FIT also allows Kicker amps to accept output from nearly any
factory or aftermarket head unit.
Stereo-and-Mono-Simultaneously (SAMS): The amp has the capability of
powering a pair of full-range speakers and a mono subwoofer from one amplifier.
The full-range can be connected normally on one pair of channels, while the
subwoofer (4 ohms) can be powered by bridging the remaining pair of channels. The SAMS
wiring diagram can be found in the Owner's Manual.
Input Level: The The DXA250.4 has a two position (in/out) switch to
set the input level type. It can be pressed in for High (for speaker
level) or set to out for Low (for line level). You should not mix low and high
inputs signals to the amp.
Fader Switch: This 4-channel amplifier can accept signals
from one or two sets of inputs. If you are running two sets (front and back),
the amp's Fader switch should be pressed in to the ON position. If you want to
drive all four channels from one set of inputs, the switch should be left in the
OFF position. With the fader Off, the four channels will receive the same volume
of signal, and you will not be able to adjust the fader front to back.
Audio Controls: The amplifier has two independent pairs of
channels (labeled Amp 1 and Amp 2), each with separate controls. A small
screwdriver is needed to set the rotary controls. Amp 1 and Amp 2 have the
- Gain: The input gain is continuously variable, labeled
0 to 11. The gain range is governed by the input level switch: 250mV to 10V
for speaker level (HI) and 125mV to 5V for line level (LO).
- Crossover Frequency: Each crossover can be set for low-pass
(LO), high-pass (HI), or full-range operation (OFF). The crossover frequency
range is continuously variable between 50 Hz and 200 Hz. The crossover slope is
12 dB per octave. It is possible to set one crossover to low-pass and the other
- KickEQ Bass Boost: The KickEQ bass boost circuit provides a
signal boost centered at 40 Hz. The bass boost is continuously variable between
0 and 12dB.
Wiring Recommendations: Kicker recommends that the amplifier
be connected to the vehicle's battery using 8 Gauge power and ground wiring. An
external 60 amp fuse should be installed on the power wire within 18" of the
battery. There are no fuses included or built into the amplifier.
Kicker Extended Warranty Offer: Kicker will extend the amp's
warranty by an additional year (for a total warranty of three years) when it
is installed with a qualifying Kicker amplifier installation kit. Kicker
CK8, or ZCK84 wiring kit for this amp. The amplifier
and installation kit must be purchased from an authorized Kicker dealer.
Left Side of Amplifier:
- GND (ground): screw terminal; accepts spade connector
up to 0.5" wide
- REM (remote turn-on): screw terminal; accepts spade
connector up to 0.33" wide
- +12V (power): screw terminal; accepts spade connector
up to 0.5" wide
- Speaker Outputs: four pairs of screw terminals; accepts
spade connectors up to 0.32" wide
Right Side of Amplifier:
- RCA Inputs: two pairs of RCA jacks, used for
line level or speaker level inputs with