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Want to pump some serious power into your system without pumping too much cash out of your bank account? Then the powerful and affordable Kenwood KAC-629S is the amplifier for you!

Kenwood loaded this amplifier with components not usually found in this price range: MOSFET power supplies, extra-large capacitors, copper-shielded EE core transformers, and toroidal noise filters. Translation — the KAC-629S will keep your music crisp and clean even at the highest sound levels.


  • stereo or bridged mono output
  • Tri-way capable (Tri-Way crossover required)
  • 75 watts x 2 at 2 ohms
  • 150 watts x 1 in bridged mode
  • requires 10-gauge power and ground leads — wiring and hardware not included with amplifier
  • 80 Hz selectable low-pass crossover, 18 dB/octave
  • 150 Hz selectable high-pass crossover, 12 dB/ octave
  • speaker-level inputs
  • 4-way protection circuitry
  • signal-to-noise ratio 100 dB
  • dimensions: 9-7/8"W x 2-1/4"H x 9-7/8"D
  • 1-year warranty

Kenwood KAC-629S Reviews

Average Customer Review:

1 Review


Written by: bryce from 61301 illinois on January 8, 2015

Good amp powering my 12" sub never an issue

Pros: ITs small durrable and cool

Cons: Not that ive found yet

Hands-on research

What's in the box?

Download owner's manual

  • 2-Channel amplifier with one 25 amp fuse
  • 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 crossover that can be set for 80Hz low-pass or 150Hz high-pass operation. The crossover may be turned off for full-range output.


Right Side Of Amplifier:

  • Filter Switch: Allows you to select full range, 80Hz low-pass, or 150Hz high-pass crossover operation
  • Stereo/L+R/Mono Switch: Allows you to choose stereo, mono or L+R amplifier operation. In L+R mode, the left and right signals are combined before being amplified.
  • 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: Inserted 25-amp fuse


Maximum Power Output:

  • Bridged Into A 4-Ohm Load: 350 watts x 1
  • Per Channel Into A 4-Ohm Load: 120 watts x 2

Rated Power Output:

  • Bridged Into A 4-Ohm Load: 150 watts x 1
  • Per Channel Into A 2-Ohm Load: 75 watts x 2
  • Per Channel Into A 4-Ohm Load: 60 watts x 2

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.