Built for high performance yet affordably priced, the Kenwood KAC-729S amplifier will rock your speaker system! Kenwood builds in MOSFET power supplies, extra-large capacitors, copper-shielded EE core transformers, and toroidal noise filters so that you get mammoth reserves of ultra-clean power.

The strikingly rugged exterior will add a stylish touch to your installation, while the built-in low-pass crossover (80 Hz at 18 dB/octave) is handy when you're pushing subwoofers. Use the speaker-level inputs to connect to a factory radio (or any receiver without preamp outputs).


  • stereo or bridged mono output
  • Tri-way capable (Tri-Way crossover required)
  • 300 watts x 1 in bridged mode
  • 150 watts x 2 at 2 ohms
  • requires 8-gauge power and ground leads — wiring and hardware not included with amplifier
  • 80 Hz selectable low-pass crossover, 18 dB/octave
  • speaker-level inputs
  • 4-way protection circuitry
  • signal-to-noise ratio 100 dB
  • dimensions: 13-3/4"W x 2-5/16"H x 9-7/8"D
  • 1-year warranty
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Hands-on research

What's in the box?

Download owner's manual

  • 2-Channel amplifier with two 20 amp fuses
  • Rubber terminal cover
  • 4 Self-tapping screws
  • Instruction Manual (English)
  • Instruction Manual (French/Spanish)
  • Warranty Card

Product Research

Inputs and Outputs


Ground Isolation Circuit: This circuit cancels noise from the input of the negative side of the RCA cable, preventing vehicle electrical noise from interfering with the music.

Quiet Turn-On: This feature allows the amplifier to power up over a period of several milliseconds instead of instantaneously, protecting your speakers from thumps and other sounds that could be damaging.

Internal Crossover: The internal crossover is a 12dB/octave, 80Hz low-pass crossover. The crossover may be turned on for low-pass operation, or the crossover can be turned off for full-range output.


Right Side Of Amplifier:

  • Filter Switch: Allows you to select full range or 80Hz low-pass crossover operation.
  • Stereo/Mono Switch: Allows you to choose stereo or mono amplifier operation.
  • Input Sensitivity: This variable control allows you to adjust the input sensitivity of the amplifier from 0.2V-5V.

Inputs and Outputs

Right Side Of Amplifier:

  • Line In: Gold-plated stereo RCA jacks
  • Speaker Level Input: Screw terminals (each terminal is 0.25" wide)

Left Side Of Amplifier:

  • Speakers: Gold-plated screw terminals (each terminal is 0.35" wide)
  • BATT (power): Gold-plated screw terminal (terminal is 0.35" wide)
  • GND (ground): Gold-plated screw terminal (terminal is 0.35" wide)
  • P.CON (remote turn-on): Gold-plated screw terminal (terminal is 0.35" wide)
  • Fuse: Two inserted 20-amp fuses


Maximum Power Output:

  • Bridged Into A 4-Ohm Load: 600 watts x 1
  • Per Channel Into A 4-Ohm Load: 200 watts x 2

Rated Power Output:

  • Bridged Into A 4-Ohm Load: 300 watts x 1
  • Per Channel Into A 2-Ohm Load: 150 watts x 2
  • Per Channel Into A 4-Ohm Load: 100 watts x 2

Our Product Research Team

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