CEA 2006 Compliant: The XR-1S's power ratings are measured
according to the strict standards dictated by the Consumer Electronics Association
(CEA). These standards allow you to accurately compare the rated power output of
all CEA 2006-compliant amplifiers.
Manufacturers who adhere to the standards can display the CEA 2006 logo on their
products and packaging. The amplifier features the following power specifications:
- 4-Ohm RMS Power Rating: 600 watts x 1-channel into 4-ohms,
measured from20-200Hz, with no more than 1% THD+noise
- 2-Ohm RMS Power Rating: 700 watts x 1-channel into 2-ohm at 100Hz
with 1% THD
- Max Power Output: 1500 watts x 1-channel Peak
Mono-Power Amp Design: The Kenwood XR-1S is designed with
specific features to power your subwoofers with a frequency range between 20-200
Hz. This amplifier is not designed to power a full-range speaker.
Class D Amplifier: For subwoofer applications, Class D amps
are very efficient and their small size offers installation flexibility. Before
amplifying an incoming signal, a Class D amp converts the signal to digital.
Digital signals can be amplified very efficiently, so you get a lot more power
with less current. Less input current reduces power supply size and generates
less waste heat, thus reducing the heat sink size. The amp then converts the
amplified signal back to analog.
Dual Sigma Drive: This advanced negative feed back circuit
improves damping factor and increases accuracy and sound quality. When a signal
is passed to a subwoofer, like a 50Hz note, the speaker will move and create the
note. However, because the speaker has mass and a suspension, it will not stop
moving instantly once it's in motion. This extra movement (sound) creates a type
of distortion that is not part of the original signal. The negative feedback
circuit senses this unwanted movement and send out an opposite pulse to stop the
speaker like an electronic brake.
Dual Power Supply: This design provides one power supply for
positive current and one power supply for negative current. The result is a cleaner
voltage source, fewer failures due to short circuit, less power loss due to variances
in transformer tolerances, and less transformer noise even when the positive and
negative loads are unstable.
Cooling Fan: There is a cooling fan and vents on each side of
the amplifier to help dissipate heat and ensure cool, reliable operation. Make sure
not to block these vents or the fan when you install the amplifier.
Protection circuitry: The XR-1S features protection circuits
that will turn the amp off in case of the following events:
- Speaker wire short-circuits
- Speaker output contacts ground
- Amp overheats
- Unit malfunctions and DC is sent to speaker output
Gain Control: The XR-1S features a gain control with input
sensitivity adjustable from 0.2 volts to 5.0 volts.
Low Pass Filter (LPF): The built-in, continuously variable
LPF (50-200Hz) allows you to adjust the frequency range of the amp. The filter
slope is 24 dB/octave.
Infrasonic Filter (ISF): The infrasonic filter eliminates
inaudible ultra low frequencies that can cause unwanted distortion in the audible
range. The filter can be adjusted between 15Hz to 40Hz to match the subwoofer and
enclosure being used. The filter slope is 24 dB/octave.
Optional Wired Remote: An optional wired remote (item number
113KCAWR10, sold separately) allows bass boost level (0-18dB) and frequency
adjustments (40-100 Hz) adjustments from the driver's seat. Multiple XR-1S amps
can be controlled using one wired remote.
Line Out Filter: The Line Out Filter switch changes the audio
signal output to the Line Out terminals on the amplifier:
- Off: the line output signal
doesn't pass through the XR-1S crossover, gain
control, or optional bass boost circuitry
- On: the line output signal
is adjusted using the XR-1S crossover, gain
control, and optional bass boost circuitry
Power And Ground Terminals: The amplifier features Allen head
set-screw Power and Ground terminals that will accommodate up to 4 gauge wire. 6
gauge minimum is recommended.
Remote Turn-On Terminal: The remote turn-on is an Allen head
set-screw terminal that will accommodate up to 8 gauge wire.
Speaker Terminals: The amplifier is equipped with two pair
of gold-plated speaker terminals for easy parallel subwoofer connection. The
speaker terminals are Allen head set-screw terminals that will accommodate up
to 8 gauge wire. 12 gauge minimum is recommended.
RCA Inputs: The amplifier features one pair of gold-plated
RCA input connections.
RCA Outputs: The amplifier has a set of line level outputs
for feeding a stereo audio signal to another amplifier. The line output can be
effected by the gain control and crossover using the Line Out Filter switch.
Fuse: The amplifier contains two 30-amp fuses.