Kenwood KAC-5001PS

Mono subwoofer amplifier — 500 watts RMS x 1 at 2 ohms (Factory Refurbished)

  • Kenwood KAC-5001PS


  • Kenwood KAC-5001PS

  • Kenwood KAC-5001PS

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Item #: 613KAC5001

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Our take on the Kenwood KAC-5001PS

by Dave Delamere

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Power and performance for your subwoofer system

Kenwood's Performance Series KAC-5001PS subwoofer amplifier can take care of your sub system's power requirements, and then some. With up to 500 watts RMS of power, you'll get clear, loud, and rockin' bass in your car. A rugged heat sink keeps this compact amp running at optimal temperatures, even when you're pushing your system hard.

Versatile adjustments and setup

A built-in low-pass filter lets you adjust the output so you'll get the best sound possible from your subwoofer/box combo. You can dial in up to 18 dB of bass boost if you want to fatten up the sound. An aluminum cover plate protects the amp's controls and connections, giving your installation a professional look.

Package deal: Save money when you buy this amp as part of these Kenwood dual 10" or dual 12" bass packages.

See more info on this item


  • mono subwoofer amplifier
  • 300 watts RMS x 1 at 4 ohms (500 watts x 1 at 2 ohms)
  • CEA-2006 compliant
  • variable low-pass filter (50-200 Hz at 24 dB per octave)
  • bass boost (0-18 dB at 40 Hz )
  • Class D design
  • preamp inputs
  • fuse rating: 30A x 2
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 9-13/16"W x 2-1/4"H x 7-9/16"D
  • warranty: 90 days
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
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
Best Frequency Response 20-200 Hz
THD at Rated RMS Power 1%
Signal to Noise Ratio 83 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 No
Preamp Outputs No
Width (inches) 9-13/16
Height (inches) 2-1/4
Depth (inches) 7-9/16
Parts Warranty 90 Days
Labor Warranty 90 Days
Product Research
What's in the box?

Download owner's manual

  • Refurbished mono subwoofer amplifier
  • 2 End caps (installed)
  • Two 30-amp fuses (installed)
  • 2.5mm Allen wrench
  • Four 5/8" Self-tapping screws
  • Instruction manual (English/ French/ Spanish)
  • Warranty information

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 open the box, verify contents, 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.


CEA-2006 Compliant: CEA-2006 is a system of testing and 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 over a frequency range of 20 Hz to 20 kHz, when applicable (20-200 Hz for this subwoofer amp). 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. Using CEA-2006 criteria, the Kenwood KAC-5001PS is rated at 300 Watts RMS x 1 channel with an 83 dBA signal to noise ratio.

Specifications: The manual also lists these non CEA-2006 compliant specifications:

  • Power: 500 watts x 1-channel (into 2Ω, at 100 Hz, no more than 1.0% THD, 14.4 volts)
  • Signal to Noise Ratio: 100 dB (at rated power)

Mono-Power Amp Design: The KAC-5001PS is designed with specific features to power your subwoofer(s) 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 much higher efficiency (less heat generated) than Class AB.

Low-Pass Filter: The built-in 24 dB/octave low-pass filter is continuously variable from 50 to 200 Hz. The crossover is always engaged (it cannot be bypassed).

Bass Boost: The bass boost circuit is centered at 40 Hz; boost is variable from 0 to +18 dB.


  • Input Sensitivity: 200mV-5V; continuously variable
  • Low-Pass Frequency: 50-200 Hz; continuously variable
  • Bass Boost: 0-18 dB; continuously variable

Inputs and Outputs:

  • Signal Input: one pair of RCA inputs
  • Power: screw terminal; accommodates spade connector up to 0.55" wide
  • Ground: screw terminal; accommodates spade connector up to 0.55" wide
  • Remote Turn-on: screw terminal; accommodates spade connector up to 0.335" wide
  • Speaker Output: one pair of screw terminals; accommodates spade connector up to 0.335" wide
  • Fuses: two 30 amp ATO fuses
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Kenwood KAC-5001PS Reviews

Average Customer Review:

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5 out of 5

Great Value, Great Tone

Written By JohnH., Boston, MA on Wednesday, April 09, 2014
The only one star review on here... Sounds like he wires his R/L Preamps to his +/- speaker leads.

My opinion? This little thing packs quite the punch. Clean bass in a very small package. It looks nice, simple power on indicatior light that is easy to spot, the LPH works great, I enjoy everything about this amp so far. For the price, I wouldn't hesitate to reccomend this to my friends looking for a smaller one off sub set up

2009 Mini Cooper Clubman Kenwood 5001 JL Audio TW3 12" Sealed enclosure Pioneer speakers all around.
Small, clean sound, easy install, not an eyesore
1 out of 1 people found this helpful
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5 out of 5

compact with big bass

Written By compact with big bass, shiprock New Mexico on Thursday, March 27, 2014
This amp is powering my rockford fosgate p2d2 12 and it pushes it effortless in a ported enclosure
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5 out of 5

Nice smp

Written By Steve, Fischer, TX on Tuesday, March 04, 2014
Crutchfield Customer Review (What's this?)
Works great and ordered another similar to it but for door speakers.
Performs well and stays cool
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5 out of 5

small but mighty

Written By matt, keene nh on Saturday, February 22, 2014
I have this amp hooked up to two infinity ref1260w in a sealed box and it pushes them great. Had it up halfway for 30 mins and it didn't even get warm can't wait to break subs in and fine tune it to see what this bad boy can do. Also for an amp that puts out this power its tiny compared to other amps in this wattage.
Size and power
Can't think of any
1 out of 1 people found this helpful
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5 out of 5

For its compact size, it does Great!

Written By Justin, Fort Worth, TX on Monday, February 10, 2014
I have it powering a Kicker 10C124 12" 4ohm sub and it supplies all the power the sub asks for. It has just enough and the correct adjustment knob options to not cunfuse or intimidate a person that may be a first timer new to a speaker/sub install and adjustment. Its a small unit, so it doesn't take up alot of space, and, only having a small amount of room in my single cab truck, it was Exacly what I needed. I push the sub really hard and the Amp seems to barely run warm, and if I remember correctly, I have the gain at probably only 50-60% . Later this week I am going to wire in a Kenwood KFC-W12PS 12" 4ohm sub in parallel with the Kicker 12" its currently pushing. I do not doubt the amp at all for supplying the power that I will need to get the sound that I'm after.
Small/Compact Design. Right choice of adjustment knobs to get a good sounding sub adjustment.
None to speak of
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"Coolness Factor"
Build Quality
Ease of Use
Sound Quality
4 out of 5


Written By Lenqt1, Kansas City, MO on Saturday, February 01, 2014
Crutchfield Customer Review (What's this?)
Clean sound and decent power.
Compact size.
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5 out of 5


Written By 4fanman, Saint Michael, ND on Monday, December 30, 2013
Crutchfield Customer Review (What's this?)
Wow. A ton of clean power
Perfect amp
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5 out of 5

Great Amp

Written By Re, Honolulu, Hawaii on Friday, October 18, 2013
Awesome amp, It slams my 12" re sub like nothing...
Powerful amp.
Its only 1000 watts
1 out of 1 people found this helpful
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1 out of 5

Kenwood KAC-5001PS

Written By Britt, Henrico Va. on Thursday, August 29, 2013
Crutchfield Customer Review (What's this?)
I purchased this amp to compliment my Kenwood DVD player and my Kenwood 12" sub and I was really disappointed. I like Kenwood products and have never had an issue with anything I have ever purchased manufactured by Kenwood but this amp kept turning off when I turned up the volume. I checked the settings with customer support and all settings and connections were proper. Maybe I just received a bad one. I returned it for refund.
Kept shutting down.
5 out of 9 people found this helpful
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4 out of 5

Kenwood KAC-5001PS

Written By Anonymous, Bethel, CT on Wednesday, March 06, 2013
Crutchfield Customer Review (What's this?)
A good quality amp. Gets the job done well.
3 out of 3 people found this helpful
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5 questions already asked Show all answers

What does it mean when the red light turns on the amp? [ jose  Jul 14, 2014 ]
3 answers
  • Its not melting anything but you don't want to touch it very long and the fan is running [ steve   Jul 20, 2014 ]
  • You have power to your amp,does it run really hot? [ steve   Jul 19, 2014 ]
  • Hello, that means it is turned on, has an active power supply, and the remote wire is hooked up correctly. Thanks, Clint MVP Motorsports [ CLINT M   Jul 14, 2014 ]
How would I go about running this amp @ 4Ohms? I own a Kicker CompR (40CWR122) 12" 800 watts RMS(1600 watts Peak) and the sub has an Ohm switch built right into the wiring port, and the amp specifically states that it can run at 500 watts RMS @ 2 Ohms or 300 watts RMS @ 4 Ohms. Is there something I have to do with the wiring or will the amp just switch itself over once I flip the switch on the sub itself? I'm interested in running at 4 Ohms because I've heard it sounds much better. Thanks in advance for any help provided! [ John  Jun 25, 2014 ]
2 answers
  • Thanks for the answer and incredible info to match. It also means I need a new amp to power the kicker or a new sub to match the Pioneer. But maximizing potential seems safer then under powering according to those links. I figured if I bought a sub that the amp couldn't blow I would be on the safer side, but apparently I figured wrong lol. Thanks again Krissy, forever in debt to your priceless advice ;-) [ John   Jun 27, 2014 ]
  • I forwarded your question to an Advisor and they responded with the following: The amplifier will automatically recognized the impedance that the subwoofer is showing to the amp and it will output the amount of power according to the impedance of the sub. Here is something that may help you understand a bit more: http://www.crutchfield.com/learn/wiring-subwoofers-ohms.html?showAll=N http://www.crutchfield.com/learn/how-to-match-subwoofers-and-amplifiers.html?showAll=N If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy Staff  Jun 27, 2014 ]
I just installed this amp yesterday pushing 2 12's and it worked for a lil bit but then quit?!? What is my problem [ Tceslinger  May 02, 2014 ]
1 answer
  • If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: http://community.crutchfield.com. Or try our online support center: http://crutchfield.custhelp.com/app/answers/list/kw/. [ Greg Staff  May 02, 2014 ]
Can I hook a bass controller to this amp from the drivers seat so I can adjust bass according to music? [ matt s.  Feb 14, 2014 ]
2 answers
  • Unless there is a third party controller you can find, there is no way to plug anything into the amp to control the bass output. Hope this helps. [ TYLER   Feb 15, 2014 ]
  • The Scion XB I installed this amp in powers a pair of 12" Kenwoods subs. I believe the sub is under powered for the application. The factory head unit in the XB has a sub output level control which is ideal and can't imagine why you couldn't install an inline contoller. [ DONALD G   Feb 14, 2014 ]
Can I use an Infinity Reference 1100 watt 10 inch subwoofer with this Kenwood amp? [ Steven  Jan 20, 2014 ]
1 answer
  • Thanks for your question. For information on selecting the best amp for your subs I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system. [ Jeff Staff  Jan 20, 2014 ]

For a more in-depth review and enhanced detailed information on the Kenwood KAC-5001PS, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_613KAC5001/Kenwood-KAC-5001PS.html ).