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-8406 is rated at 70
watts RMS x 4 channels with an 80 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 support a 2-ohm load in stereo;
the 2-ohm power output is 100 watts RMS x 4 channels.
Bridgeable: Each half of the four-channel amplifier can be
bridged into a 4-ohm mono load; the bridged output is 200 watts RMS x 2 channels.
If you prefer, just half the amp can be bridged for three-channel operation (70
watts RMS x 2 channels + 200 watts RMS x 1 channel).
Cast Aluminum Heat Sink: The KAC-8406 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-8406 features an adjustable gain
control; 0.2-5.0 volts line level (RCA) and 4.0-12.0 volts speaker level.
Crossover: The four-channel amp is separated into two halves,
labeled A and B. The A channel and B channel crossovers have independent controls:
- Mode: high pass, low pass, or off
- Frequency: rotary dial; continuously
variable from 50 Hz to 200 Hz
Bass Boost: The bass boost circuit provides an 18 dB signal
boost centered at 40 Hz; the bass boost is manually turned on or off.
Power Connections: The power and ground connections are
0.55" wide screw terminals. The remote turn-on screw terminal is 0.35"
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 50 amp fuse value
and the current consumption specification of 35 amps, we recommend an 8 gauge
Speaker Outputs: The four pair of speaker outputs are 0.35"
wide screw terminals. 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 two pair of stereo RCA
jacks (A-channels and B-channels).
Speaker Level Input: A wiring harness is included for the
speaker level input.
Fuse: The amplifier uses two 25-amp ATO blade-type fuses.
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