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Brand Kenwood
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Kenwood KAC-511 500 Watt Class D Mono Amplifier (Certified Refurbished)

Brand Kenwood
(0 Reviews)

Kenwood KAC-511 500 Watt Class D Mono Amplifier (Certified Refurbished)

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Brand Kenwood
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Out of Stock

Kenwood KAC-511 500 Watt Class D Mono Amplifier (Certified Refurbished)



About This Product


Kenwood KAC-511 500 Watt Class D Mono Amplifier (Certified Refurbished)


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 amplifier power uses a DC input voltage of 14.4 volts and the RMS power output is measured over a frequency range of 20 Hz to 20 kHz (for full range amplifiers), with 1% or less Total Harmonic Distortion plus noise (THD+N). Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4 ohms. CEA-2006 standards allow consumers to compare car amplifiers and receivers under the same conditions (apples to apples).

CEA-2006 Specifications:
Power Output: 300 watts RMS x 1 into 4-Ohm
Signal to Noise Ratio: 85 dBA (measured at 1 watt into 4-Ohm)

Other Specifications: (not using the CEA 2006 criteria)
Power Output: 500 watts RMS x 1 into 2-Ohm (at 100 Hz, 14.4 volts, ≤1.0% THD)
Signal to Noise Ratio: 100 dB (at rated power output)

Mono-Power Amp Design: The Kenwood KAC-511 is designed with specific features to power your subwoofer with a frequency range between 20 and 200 Hz. This amplifier is not designed to power a full-range speaker.

Class D Amplifier Design: The amplifier design is Class D, which uses digital switching power supplies. The result is the amplifier runs more efficiently, generating less heat than Class AB amps. The Class D design also allows the amplifier to be built on a small chassis, and installed where space is limited.

Signal Sensing: The amplifier has a signal-sensing turn-on circuit on the speaker level input. When a signal (up to 50 watts) is detected on the speaker level inputs, the amplifier will automatically power on. When the signal is no longer detected, the amp will turn off. This allows you to install the amplifier without a remote turn-on lead if the speaker level input is used. (When using speaker level inputs, connect the white, white/black, gray, and gray/black wires.)

Wired Remote Control: A wired remote control is included to adjust the output level from the driver's seat. When flush mounted the remote is 1⅜" deep and the knob protrudes ¾" from the mounting surface.


Input Sensitivity: The Input Sensitivity control lets you match the amplifier input to the preamp output level of the source unit. The rotary control is adjustable the between 200mV (0.2V) and 5V, with markings at 0.2V, 0.3V, 0.5V, 1V, 2V, 3V, 4V, and 5V.

Low-Pass Filter: The built-in low-pass filter is always engaged (it cannot be bypassed). The crossover slope is -24dB/octave and the crossover point is continuously variable from 50Hz to 200Hz, with markings at 50Hz, 80Hz, 100Hz, 150Hz, 180Hz, and 200Hz.

Bass Boost: The Bass Boost increases the bass output, centered at 40Hz. The rotary control lets you adjust the boost between 0dB and 18 dB, with markings at 0dB, 1dB, 3dB, 5dB, 8dB, 12dB, and 18dB.

Infrasonic Filter: The infrasonic filter can be turned on or off, as desired. The filter slope is -24dB/octave at 25Hz.


Line In: The line level RCA inputs will accept a signal between 200mV and 5V.

Power/Ground/Remote Turn-on: The amplifier has screw terminals for the power, ground, and remote turn-on, and will accommodate spade connectors or ring terminals. The power and ground terminals are 0.55" wide and the remote turn-on terminal is 0.35" wide.

Speaker Output: One pair of screw terminals is provided for connecting the subwoofer. The terminals are 0.35" wide, and accommodate spade connectors. The amplifier is designed for a 4-Ohm load, but can also handle a 2-Ohm load.

Speaker Level Input: When an RCA line level signal is not available, use the included 8" speaker level input harness (connect the white, white/black, gray, and gray/black wires).

Fuses: Two 30-amp ATC fuses are installed in the amplifier. With the 60-amp fuse rating, an 8-gauge amplifier wiring kit is recommended with a 60-amp (minimum) fuse installed within 18" of the battery.

Remote: The RJ-14 connection is for the included wired remote control, allowing output level adjustment from the front of your vehicle.

Features & Specifications

RMS Power Output (Watts x Channels): 300 x 1
Peak Power Output (Watts x Channels): 1000 x 1
Power at 2 Ohms (Watts x Channels): 500 x 1
Bridged Power (Watts x Channels): N/A
Minimum Impedance Bridged: N/A
Minimum Impedance Unbridged: 2
Minimum Impedance: 2
Best Frequency Response: 20-200 Hz
THD at Rated RMS Power: 1%
Signal to Noise Ratio: 85 dB
Input Voltage: 14.4v


Amplifier Class: D
Low-Pass Crossover Frequency: 50-200 Hz
Low-Pass Slope (dB/octave): 24 dB/octave
High-Pass Crossover Frequency: N/A
High-Pass Slope (dB/octave): N/A
Bass Boost: 0-18 dB
Bass Boost Frequency: 40 Hz
Fan Cooled: No
Fuse Rating: 60
Speaker Level Inputs: Harness
Preamp Outputs: No
Width (inches): 8-7/16
Height (inches): 2-1/8
Depth (inches): 5-15/16

  • Wired Remote Control
  • Bass Boost
  • Remote Included