Features
Controls
Inputs and Outputs

Features

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 20,000Hz, 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-X1R under CEA-2006 regulations is rated at 600 Watts RMS x 1 channel with a 80dBA signal to noise ratio.

Mono-Power Amp Design: The Kenwood KAC-X1R is designed with specific features to power your subwoofers with a frequency range between 5 to 400 Hz. This amplifier is not designed to power a full-range speaker.

1-Ohm Stable: The Kenwood class D mono-amplifier is capable of handling load impedances down to 1-ohm. The amplifier is rated at 1,200 Watts RMS x 1 channel in 2 ohms at 100Hz with 0.5% THD. The amp is rated at over 1,000 Watts RMS x 1 channel in a 1ohm load.

Class D Amplifier Design: The KAC-X1R 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

Dressing Cover: The Kenwood KAC-X1R features and attractive brushed aluminum hairline top plate and a removable top aluminum cover that conceals all of its controls and set-screws for the power, ground, and turn-on lead terminals. 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.

Digital Display: The KAC-X1R features a high-performance 14-segment, 5-digit blue florescent display that displays in the center window of the top aluminum cover plate. The digital display uses a rotary dial to select the display mode. You can choose from the following display modes.

• Voltage: indicates the source voltage
• Current: indicates the current consumption
• Temperature: indicates the internal temperature (you can select between Fahrenheit or Centigrade)
• Demo: you can choose On or Off (when set to On the Voltage, Current and Temperature items are displayed repeatedly)

Dual E Sigma Drive: Kenwood's Dual E Sigma Drive provides a bridged output with an excellent damping factor that allow the amplifier to pump out an extraordinary amount of high-fidelity power.

Dual Power Supply: The KAC-X1R utilizes a dual power supply with two transformers and a cast aluminum heat sink to ensure steady operation even when the positive and negative loads are unstable.

Parallel Connection: The amplifier is equipped with two pairs of full-contact speaker terminals for an easy parallel subwoofer connection.

Variable Low-Pass Filter: The KAC-X1R has a built-in -24dB/octave low-pass filter that is continuously variable from 40Hz to 200Hz. You can turn the Low-pass filter On or Off.

Infrasonic Filter: This amp features an -24dB/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 from 15Hz to 60Hz cuts the frequencies below the respective frequency to improve the reproduction performance of the speakers by eliminating harmful distortion.

Phase Inverter: The amp has a switch that allows you to invert the phase of the speaker output. You can select 0° or 180°.

Band Reject Filter: The Band Reject Filter can solve the problems of resonance or unclear sound with minimum influence on the sound quality because it eliminates only the frequencies causing resonance or standing waves. You can select the variable Band Reject Filter to be set anywhere from 40 to 200Hz with a -12dB or -6dB slope.

Line Level Inputs: The one set of gold plated 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.

Line Level Output: The amplifier has a set of gold-plated line level outputs for feeding a stereo signal to another amplifier. There is a Line Out Filter switch on the amplifier that allows you to set the Line Output RCAs of the amp to have no effects from the amplifiers settings or you can set the Line Output to carry the same low-pass filter, inputs sensitivity and bass boost settings to your second amplifier.

Remote Terminal: The KAC-X1R has a remote terminal jack that is compatible with the Kenwood Bass Boost Wired Remote Controller (KCA-WR10, sold separately). The optional wired remote allows you to have independent bass boost control of the amplifier in your system. Using the optional KCA-WR10 you can set the variable Bass Boost Circuit to 0 to 18 dB and the variable Bass Boost Frequency to 40 to 100 Hz.

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 protect mode.

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 speaker output
• Internal temperature is too high
• Voltage is outside of the operating range

Controls

Top of the Amplifier: The following amplifier's controls are found on top of the amp under the removable dressing cover.

• Input Sensitivity: 200mV-5V
• Low Pass Frequency: 40-200 Hz
• LPF Switch: On or Off
• Infrasonic Filter Frequency: 15-160Hz
• ISF Switch: On or Off
• Band Reject Filter Frequency: 40-200Hz
• BFR Switch: -12dB, -6dB or Off
• Phase Switch: 0 or 180-degrees
• Menu Dial: Voltage, Current, Temperature and Demo

Front of the Amplifier: The following amplifier's controls are found on the front of the amplifier.

• Line Out Filter: On or Off
• Reset: Resets the microprocessor of the amplifier

Inputs and Outputs

Front of the Amplifier: All of the amplifier's connections are found on the front of the amp. The amplifier's dressing cover must be removed to access the set-screws for the amplifier's power, ground, turn-on, and speaker terminals.

• Fuses: Three 25A fuses
• Power: full-contact set-screw terminal will accept 4-AWG to 8-AWG power cable
• Ground: full-contact set-screw terminal will accept 4-AWG to 8-AWG ground cable
• Remote Turn-on: full-contact set-screw terminal will accept 6-AWG to 18-AWG wire
• Speaker Outputs: two sets of full-contact set-screw terminals that will accept 6-AWG to 18-AWG speaker wire
• Ground Screw: Phillips-head screw for RCA signal ground if needed
• Line In: One pair gold-plated RCA inputs
• Line Out: One pair gold-plated RCA outputs
• Remote: RJ-11 jack connects the optional wired remote controller (KCA-WR10)