Inputs and Outputs
CEA-2006 Compliant: CEA-2006 is
a new system of testing & 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 into a 4-ohm
load, with 1% or less Total Harmonic Distortion (THD) plus noise, and at a
frequency range of 20 Hz to 200 Hz 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. The Kenwood KAC-9103D under CEA-2006 regulations is rated at
500 Watts RMS x 1 channel with a 94dBA signal to noise ratio.
Mono-Power Amp Design: The
Kenwood KAC-9103D is designed with specific features to power your subwoofers
with a frequency range between 5-200 Hz. This amplifier is not designed to
power a full-range speaker.
1-Ohm Stable: The Kenwood
mono-amplifier is capable of handling load impedances down to 1-ohm. The
amplifier is rated at 900 Watts RMS x 1 channel in 2 ohms at 100Hz with 1.1%
THD. The amp is rated at over 900 Watts RMS x 1 channel in a 1ohm load.
Class D Amplifier Design: The
KAC-9103D is a Class D mono-block amplifier, which uses digital switching to
amplify audio signals. This design results in high efficiency and less heat.
MOS-FET Switching Power Supply: The amplifier utilizes a MOS-FET switching power supply providing
thermal stability and efficient switching speeds
guaranteeing performance and dependability.
Parallel Connection: The
amplifier is equipped with two pairs of gold-plated speaker terminals for an
easy parallel subwoofer connection.
Dressing Cover: The Kenwood
KAC-9103D features a top cover that conceals all of its controls. This provides a
very clean look as well as protects the amplifier's controls from being
accidentally changed. The cover is held in place by two hex head screws. An
allen-wrench is supplied to remove the cover.
The KAC-9103D has a built-in 24dB/octave low-pass
filter that is continuously variable from 50Hz to 200Hz.
The bass boost is adjustable from 0-18dB at 40Hz.
Infrasonic Filter: This amp
features an 18dB/octave Infrasonic Filter. Ultra-low frequencies that cannot be
reproduced by a subwoofer do not become sound but become unnecessary
oscillations, which affect sound by causing distortion. These frequencies also
waste amplifier power and can cause damage to speakers. Setting the Infrasonic
filter switch to 15Hz or 25Hz cuts the frequencies below the respective
frequency to improve the reproduction performance of the speakers by eliminating
Phase Inverter: The amp has a
switch that allows you to invert the phase of the speaker output. You can select
0° or 180°.
Line Level Inputs: The RCA type line-level inputs have a gain (Input
Sensitivity) control. The
Input Sensitivity control will accept an input signal of 200mV to 5.0 Volts.
Speaker Level Input: The
KAC-9103D comes with a speaker level input harness. This feature makes it easier to add an
amplifier to a factory radio or to a receiver with no preamp outputs.
Line Level Output:
The amplifier has a set of line level
outputs for feeding a full-range stereo signal to another amplifier. It is the
same signal that is input through the line inputs. The amplifier's crossovers
have no effect on the line level output signal.
Fan: There is a fan on top of the amp to help dissipate heat and ensure cool,
reliable operation. There is a blue-LED that illuminates next to the fan when
power is supplied to the amp.
Power Indicator: When the power
is turned on to the amplifier, the Power indicator will light up. This indicator
will turn off with the amplifier and will turn off if the amplifier goes into
Protection circuitry: The amplifier features protection circuits that will turn the amp off in case of
the following events to protect the amplifier and your speakers:
- Speaker output contacts ground
- Speaker wire short-circuits
- Unit malfunctions and DC is sent to
- Internal temperature is too high
- Loss of ground of head unit or amp
Top of the Amplifier:
All of the amplifier's controls are found on top of the amp under the removable
- Bass Boost Level: 0-18 dB
- Low Pass Frequency:
- Input Sensitivity:
- ISF Switch: 25Hz, 15Hz or
- Phase Switch: 0 or
Front of the Amplifier: All of
the amplifier's connections are found on the front of the amp.
Two 30A fuses
Gold-plated screw terminal (0.5625" wide)
Gold-plated screw terminal (0.5625" wide)
Turn-on: Gold-plated screw terminal (0.3125"
- Speaker Outputs:
Two pair of gold-plated screw terminals (0.3125" wide)
- Ground Screw:
Phillips-head screw for RCA signal
ground if needed
- Line In:
One pair of gold-plated RCA inputs
- Line Out:
One pair gold-plated RCA outputs
- Speaker-level Input:
Multi-pin input for use with included speaker level input harness