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CEA-2006 Compliant: CEA-2006 is a system of testing and
measurement 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 standards
allow consumers to compare car amplifiers and receivers under the same conditions
(apples to apples). Using CEA-2006 criteria, the Kenwood KAC-9106D is rated at
watts RMS x 1 channel with a 76 dBA signal to noise ratio. The signal to noise
ratio at the rated power output (not CEA-2006 conditions) is 100 dB.
2-Ohm Stable: The amplifier can also support a 2-ohm load;
the 2-ohm power output is 1,000 watts RMS x 1 channel.
Cast Aluminum Heat Sink: The KAC-9106D utilizes a cast aluminum
heat sink design to ensure the amplifier stays cool.
Protection circuitry: The amplifier features protection
circuits that will turn the amp off in case of the following events:
- speaker wire short-circuits
- speaker output contacts ground
- unit malfunctions and DC is sent
to speaker output
- the amp overheats
Power Indicator: When the amplifier is turned on the Power
indicator (on top of the amp) lights up. This indicator turns off with the
amplifier, and will turn off if the amplifier goes into protect mode.
Auto Turn-on: When using a speaker level input, the amp will
turn on automatically when it senses the input signal.
Gain: To accommodate the varying range of signal levels from
today's factory and aftermarket radios, the KAC-9106D features an adjustable gain
control; 0.2-5.0 volts line level (RCA) and 4.0-12.0 volts speaker level.
Crossover: The built-in 24 dB/octave low-pass filter has a
continuously variable crossover point; 50Hz to 200Hz. Because this is a subwoofer
amp, the crossover is always engaged.
Infrasonic Filter: The 24 dB/octave Infrasonic Filter
removes ultra-low frequencies that cannot be reproduced by most subwoofers.
These frequencies do not become sound, but unnecessary oscillations which
affect sound by causing distortion. These frequencies also waste amplifier
power and can cause damage to speakers. The filter's crossover point is
continuously variable from 20 Hz to 50 Hz.
Bass Boost: The bass boost is adjustable from 0-18dB at
Power Connections: The power and ground connections are
0.55" wide screw terminals. The remote turn-on screw terminal is 0.335"
wide. A Phillips-head or flat blade screw driver (not supplied) is required to
tighten/loosen the terminals. Spade connectors are recommended. The manual lists
a minimum of 10 gauge wire for power and ground, but given the 120 amp fuse value
and the current consumption specification of 65 amps, we recommend a 4 gauge
Speaker Outputs: There are two pair of 0.335" wide screw
terminal speaker outputs; they are internally wired in parallel, making it easy
to connect two subwoofers. A Phillips-head or flat blade screw driver (not supplied)
is required to tighten/loosen the terminals. Spade connectors are also recommended
for the speaker wires.
Line Level Input: The line input is a pair of stereo RCA
Line Level Output: The amplifier has a pair of RCA line
level outputs for feeding another amplifier; it is the same signal that is input
through the RCA line inputs. The amplifier's crossovers have no effect on the
line level output signal.
Speaker Level Input: A wiring harness is included for the
speaker level input.
Fuses: The amplifier uses three 40-amp ATO blade-type fuses.