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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 4-ohm load, with 1% or less Total Harmonic
Distortion plus noise (THD+N), and over a frequency range of 20 Hz to 20 kHz, when
applicable. Signal-to-Noise ratio is measured in weighted absolute decibels (dBA)
at a reference of 1 watt into 4 ohms. CEA-2006 allows consumers to compare car
amplifiers and receivers on an equal basis. Using CEA-2006 criteria, the Kenwood
XR900-5 is rated at 60 watts RMS x 4 plus 400 watts RMS x 1 (subwoofer) with a
78 dBA signal to noise ratio.
Specifications: The manual also lists these non CEA-2006
- Full Range: 75 watts x 4-channels
(into 2Ω at 1 kHz, with no more than 1% THD, 14.4
- Subwoofer: 600 watts x 1-channel
(into 2Ω at 100 Hz, with no more than 1% THD, 14.4
- Signal to Noise Ratio: 100 dB (at
Class D Amplifier Design: The amplifier design is Class D,
which uses digital switching power supplies. The result is much higher efficiency
(less heat generated) than Class AB.
5-Channel Design: The XR900-5 is made up of three sections,
two full range stereo amps (labeled A and B, typically used to power front and
rear speakers) and a subwoofer amp (1-channel). The front and rear amps are
independently bridgeable, meaning the XR900-5 can be used as a 5-channel,
4-channel, or 3-channel amp. The minimum impedance for each section is 2Ω,
4Ω when bridged.
Crossovers: The front, rear, and subwoofer amplifier sections
have independent crossover controls. The front and rear crossovers can be set to
high-pass or turned off (full range). The subwoofer crossover is low-pass only and
cannot be bypassed. The crossover point for each is continuously variable from 50
to 200 Hz. The high-pass crossover slope is 12dB per octave and the low-pass
crossover slope is 24dB per octave.
Bass Boost: The bass boost circuit for the subwoofer section
is centered at 40 Hz; boost is variable from 0 to +18 dB.
Aluminum Heat Sink: The aluminum heat sink increases the
amplifier's heat dissipation efficiency, increasing the life of the amplifier.
- Input Sensitivity: 200mV-5V; front,
rear, and sub independently adjustable
- Crossover: the front, rear, and subwoofer
channels have independent controls for these crossover functions:
- Mode: the front and rear crossovers
can be set to high-pass or off (full range)
- Frequency: each section is continuously
variable; 50-200 Hz
- Bass Boost: 0-18 dB; continuously variable
(subwoofer section only)
Inputs and Outputs:
- Signal Input: three pair of RCA preamp
inputs; front, rear, and subwoofer (labeled A, B, and Sub)
- Power: set screw terminal; accommodates
bare wire up to 4-gauge
- Ground: set screw terminal; accommodates
bare wire up to 4-gauge
- Remote Turn-on: set screw terminal;
accommodates bare wire up to 10-gauge
- Speaker Output: five pair of set screw
terminals (left and right A channels, left and right B
channels, and sub); accommodate bare wire up to 10-gauge
- Fuses: three 40 amp ATO fuses