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Kenwood KSC-SW11

Compact powered subwoofer (New stock)

57 Reviews | 20 questions - 49 answers


Our take on the Kenwood KSC-SW11

Kenwood's KSC-SW11 powered subwoofer might look small, but it delivers impressive bass. This little powerhouse will fit under a seat in most vehicles, where it'll produce low-frequency response equal to that of a larger subwoofer in your trunk. It offers a great solution for those who want to reinforce the bass in their system without taking up a lot of space.

Big bass in a compact package

Kenwood's KSC-SW11 powered subwoofer might look small, but it delivers impressive bass. This little powerhouse will fit under a seat in most vehicles, where it'll produce low-frequency response equal to that of a larger subwoofer in your trunk. It offers a great solution for those who want to reinforce the bass in their system without taking up a lot of space.

Kenwood KSC-11 compact powered subwoofer

This tiny powered subwoofer can fit in many tight spaces.

Big woofer, rigid chassis

Kenwood gives you the biggest bang possible by stuffing an 8-1/4" x 5-1/8" woofer into this enclosure. The rigid aluminum enclosure eliminates rattles, while the durable built-in amplifier feeds the speaker 75 watts RMS. Kenwood throws in a wired remote, so you can control the bass from the driver's seat. A wiring harness and mounting brackets are also included.

Easy install under the drivers seat of my 98 Ranger Supercab, Used factory CD player as source, Did help significantly with low end frequencies.

Anonymous, Estacada, OR

What's in the Box:

  • Powered subwoofer
  • Wired remote control with attached 16.4' cord (has 6-conductor RJ-25 plug on the end)
  • 14' Speaker-level input cable (male stereo RCA jacks on one end and speaker wire with bullet connectors on the other)
  • 16.4' Power harness
  • Cable security bar
  • Adhesive backed hook and loop fastener (1-1/2" x 7/8")
  • 2 Mounting brackets
  • Four 5/8" Self-tapping screws
  • Four M4 x 6mm Machine screws
  • Two M3 x 8mm Machine screws
  • Instruction manual (English/ French/ German/ Dutch/ Italian/ Spanish/ Portuguese/ Russian)
  • Warranty information

Product Highlights:

  • compact powered subwoofer
  • aluminum enclosure with 8-1/4" x 5-1/8" sub
  • built-in amplifier: 75 watts RMS power (150 watts maximum)
  • wired remote for control over:
    • volume level
    • variable low-pass crossover (50-125 Hz)
    • selectable phase control (0°, 180°)
  • power/ground wiring harness
  • preamp- (RCA) and speaker-level inputs
  • frequency response: 35-125 Hz
  • dimensions: 11"W x 2-3/4"H x 7-1/2"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

Kenwood KSC-SW11 Reviews

Average Customer Review(s):

(57 Reviews)
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Hands-on research

Features and Specs

Enclosure Type Sealed
Finish Material Metal/Plastic
Grille Metal
Connector Type RCA, Molex
Bi-amp Inputs No
Woofer Size (inches) 5x8
Woofer Material N/A
Passive Radiator ---
Width 11"
Height 2-3/4"
Depth 7-1/2"
Second Depth N/A
Parts Warranty 1 Year
Labor Warranty 1 Year
Frequency Response 35-125
Amplifier Power (RMS) 75 watts
Maximum Wattage 150 watts
Sensitivity 110 dB
Impedance ---
Second Voice Coil Impedance ---
Crossover Point 50-125

Product Research


Product Overview: The KSC-SW11 amplified subwoofer features a built-in amp (75 watts RMS, 150 watts peak) and an oval woofer (8-1/4" x 5-1/8"), housed in a rugged, compact enclosure.

Wired Remote Control: The wired remote control provides fingertip control over your low frequencies. You can adjust the volume and crossover point (50-125 Hz), plus switch the phase from 0° to 180°. The remote control can be mounted using the supplied adhesive hook and loop fastener. The sub can be used without the remote, but the volume, crossover point, and phase will all revert to the default values.

Note: There are no controls on the subwoofer.

Mounting Options: The brackets can be mounted to either the sides or the ends of the enclosure. They add approximately 1-1/8" to the width or length, and 1/8" to the height.

Signal Input: The female RCA inputs on the included harness can be used with a line level or speaker level signal. A 14' speaker-level input extension cable is also included (male stereo RCA jacks on one end and speaker wire with bullet connectors on the other).

Wiring Harness: The included wiring harness covers power, ground, remote turn-on, and signal input. The wire length varies by function:

  • Ground: 58"
  • Signal Input: 26" (terminated with female RCA jacks)
  • Power: 16.4'
  • Remote Turn-on: 16.4'

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.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Need some oomph.. [ Jetcarrier  Jun 16, 2017 ]
This is what Adam recommended for me. [ Christine  Apr 20, 2017 ]
Fit plus good reviews [ Matthew  Mar 12, 2017 ]
Compact and with fit under my seat [ Stuart  Feb 08, 2017 ]
quality, reputation, size [ P  Nov 22, 2016 ]
I wanted a small powered subwoofer that will not take up usable passenger or cargo space in my 2008 Honda CRV LX. This should fit perfectly on the floor between the front seats and below the folding console. ( If not, it should fit under the driver's or front passenger's seat.) [ John W.  Oct 15, 2016 ]
Wanted to add some extra oomph without sacrificing trunk space [ William  Oct 02, 2016 ]
Compact design [ JEREMY S.  Sep 17, 2016 ]
Very good for size. Easy to install. Considering getting another in the future, so there's 1 under each seat for extra oomph [ Nicholas  Apr 15, 2016 ]
Formfactor and the rest of my system is Kenwood. [ SCOTT  Feb 03, 2016 ]
Will fit under seat of 2014 Chrysler Town & Country [ Robert  Dec 07, 2015 ]
no adjustments on unit for someone seated in back to kick when under seat mounted. [ weldr1  May 07, 2016 ]

20 questions already asked

If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings/connections 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, or try our online support center: [ Kenny  May 19, 2017 ]  Staff
I'm afraid the class of the built-in amplifier is not specified in our research or in the owner's manual. You may want to try reaching out to Kenwood directly for more info on that--their support number is 800-536-9663. If you would like to discuss further, feel free to contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Larry  Mar 28, 2017 ]  Staff
not in a mini but 4 door f350, adds bass but not hard thump, we went with 2 units under rear seat for a little more, would recommend if not trying to rattle the windows, kicker in another truck seems a little deeper bass with same set up [ Chris  Jan 27, 2017 ]
Hello. The two jacks are for an included wiring harness (your power and signal inputs) and the included remote control (looks like old style phone jack.) I have been happy with my unit. Very easy to move from car to car. [ michael  Aug 29, 2016 ]
This is for all of the available compact subs, I would recommend to contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle, compare the different subs available and give you the details on if they will fit and what you will need for an installation in your vehicle. [ Kenny  Jun 03, 2016 ]  Staff
18-16 gauge on the remote turn-on lead and 12-14 on the power lead (as best we can tell as they do not provide the gauge specs in the manual.) You can also contact Kenwood directly for the definitive answer: 800-KENWOOD. I hope that helps! My Bio: [ Ryan  May 24, 2016 ]  Staff
For details on installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on what you will need for an installation. [ Kenny  Mar 08, 2016 ]  Staff
This will depend largely on your vehicle. For details on installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on what you will need for an installation. [ Kenny  Mar 08, 2016 ]  Staff
Absolutely. A moderately powered subwoofer will be fine. High powered multi-amp systems are definitely not recommended but the power draw from this single subwoofer will not be a problem. I hope that helps! My Bio: [ Ryan  Jan 25, 2016 ]  Staff
A rep at Crutchfield helped me hook the power to the sub using blade fuse adapters to the windshield wiper fuse. As soon as you start your car, or the key is in the on position, power is applied to the sub, and like wise removed when you turn the key off. This worked for my 2009 Ford Ranger but your car maybe wired differently, so be sure to ask for an installation tech (?). They're very friendly and knowledgeable. Hope this helps. [ Mike  Dec 16, 2015 ]
Yes, just connect the blue wire. [ michael  Dec 15, 2015 ]
Yes, it does. [ Larry  Dec 14, 2015 ]
I didn't install this myself but, after install the amp knew to turn itself on and off when the car was turned on and off. I'm assuming that's the responsability of one of the wires that comes with a standard wiring harness. Not sure about technical side of how to make that happen, but the answer is yes...the amp will do that if installed correctly. [ Tristan  Dec 14, 2015 ]
I think it would work for you. It puts out a surprising amount of audible bass. I have it in a 2014 Spark EV and it will vibrate the rearview mirror. It makes the paltry 4" speakers in the car bearable. That said, the driver is small so don't expect it to thump like a 1000 watt 12" subwoffer in a large bandpass box. It will add some noticeable bass to your 6.5" speakers. [ Charles  Nov 21, 2015 ]
Tyler, Great question. I've bought two of these units, for different vehicles, so here's what I can tell you: I put the first one in my 2002 Ford Excursion. It noticeably increased and improved the bass. I too was not looking for a "thumper," but definitely an improvement over not having it. However, with a vehicle that big, I decided two of them would work better. Both were placed under the center seat. I was very pleased with the sound I got. Primarily listen to classic rock, some country and also some gospel/religious music. The latter being mostly live recordings. For all of the above, the sound was dramatically better than stock, but I replaced the head unit and all the stock pieces as well. I ended up selling that one in a moment of weakness and really miss my big SUV. I also have a 2003 Corvette coupe. I replaced the factory setup in it just recently. I used one of these subs mounted along the back wall of the luggage area. In a vehicle that size, one unit seems to be plenty enough. Again, I want to hear, and to a slight degree, feel the bass. But I did not want the thumping or vibration commonly heard amongst people half my age (or less). Overall, I'm very pleased with the product and found installation to be easy. Hope this helps! [ PAUL D  Nov 20, 2015 ]
Hey Tyler - I have a 2016 Santa Fe with a subwoofer under each front seat. This Kenwood is the best choice if you have limited space and need to fill that low end void. This particular unit is a bit on the "punchy" side, meaning it hits the mid-bass very well but struggles to find the very bottom of the frequency spectrum. That's a small gripe - this little guy definitely makes the music much more enjoyable and it's got a very handy remote control that should let you tune it to fit your taste. Good luck and enjoy! [ William  Nov 19, 2015 ]
I run a similar setup in a convertible with this powered subwoofer due to space constraints. It is mounted under the passenger seat. Even with the top down, I have found this unit provides ample bass to fill out lower frequencies that most amplified 6.5" speakers lack. It is fair to describe the sound quality as balanced, but there are certainly more expensive units that perform better. Overall, it is excellent value for tight applications or cabin fill. [ ROBERT  Nov 19, 2015 ]
No, not with this one. I installed this amp/sub in my 2014 Ford Focus and no battery modification was needed. I forget the wattage of the amp, but relative to many amps it was quite small. This amp/sub combo is one of the best compact, and low-power amp/subs available. The bass it puts out is tight and punchy...very little boom or rumble...yet you disn't ask about it so I won't ramble on about all that. [ Tristan  Aug 08, 2015 ]
Personally, I've never heard or seen of a recommendation to increase battery capacity for any aftermarket components. Batteries are used to start the vehicle. Once it is running, power comes from the alternator. The only problem with the battery is if the alternator goes bad, subsequently not providing enough charge to power all accessories, run the vehicle and recharge the battery, you will eventually exhaust the battery. Having said that, I have one of these in a Ford Excursion diesel. You'd never see the impact on that vehicle in terms of electricity. I put the newest one in my Corvette, no problems. I have different components but with the same power draw installed in my HD Ultra Classic, no problems. So, if a motorcycle can handle the power requirements of these pieces, I cannot see why any car would have a problem with this unit. Remember, this sub will enhance bass output and definitely improve the sound of music in your vehicle. However, this isn't going to produce the obnoxious thundering booms so many kids do these days. But it will definitely enhance my classic rock music collection and really wakes up "Dazed and Confused." [ PAUL D  Aug 07, 2015 ]
Not required! [ Larry  Aug 07, 2015 ]
I had to buy my own RCA cables [ VIREN  Jul 14, 2015 ]
rca?it comes with alot of different wires [ Rollin  Jul 14, 2015 ]
The 10-pin connector cord (5m/16ft) has power and speaker input. RCA cable can be connected to 10-pin connector. A RCA cable is not included. [ KEITH B  Jul 14, 2015 ]
Yes [ Ronda  Jul 14, 2015 ]
the unit has female rca connectors.. [ WILEY JAMES  Jul 14, 2015 ]
I didn't screw down just put coarse side of velcro on bottom of sub [ Rollin  Jun 04, 2015 ]
Yes I would secure it. I installed this in a jeep wrangler and I actually used adhesive velcro strips as I wanted to be able to remove or move the subwoofer as there is very little trunk space. The Velcro works greats and gives me good flexibility when I need to use the trunk. The unit comes with brackets and can also be secured with screws but the velcro I used certainly is strong enough to retain the unit. Hope this helps. [ Paul  Jun 04, 2015 ]
My husband put mine in the trunk, up against the rear seat without any method of securing it. I have a Cadillac CTS and haven't had any issues with the subwoofer sliding, or shifting. [ MARCI K  Jun 04, 2015 ]
Hi Rob, Yes, securing the subwoofer would be advisable. Mounting hardware is included and it is easy to do. [ ALFRED  Jun 04, 2015 ]
Yes, definitely. It's a potential safety hazard if a subwoofer is not secured to the vehicle. You will need to screw the unit into the carpet either under your seat or in another location of your choosing. The Kenwood KSC-SW11 comes with the screws. [ David  Jun 04, 2015 ]
Velcro tape strips worked great [ VIREN  Jun 04, 2015 ]
You want to secure it as well as possible for both sliding and more importantly, sound. Subwoofers that are not mounted properly will disperse the sound waves into distortion which gives you no chance at good bass. This little guy, when mounted properly under the seat, gives a nice punch when it's tuned correctly. It's not going to get to the very low notes - need a larger enclosure for that. But it certainly fills the gaping hole in bass that the factory speakers simply can't fill. I would recommend this product to anyone who has a tight space to work with and it's a good value for the price. FYI - I'm a former national "crank it up" champion so this advise isn't coming from just any random customer. Good luck! [ William  Jun 04, 2015 ]
In a 2006 Camry XLE, there was no need to secure the subwoofer because it was such a tight fit that I had to remove the seat, set the subwoofer in place, then bolt the seat back over the subwoofer with the steel crossmembers of the seat pressing against the subwoofer housing. There is almost no way for it to slide around under there. All that said, if the seat was not physically pressing against the subwoofer, I would have secured it with straps because I think it is light enough and the bottom is not rough or "grippy" enough to stay in place under heavy acceleration/cornering/braking without sliding around under the seat. Not asked, but opinion offered here: great sound, especially for the price. We are very happy with our purchase. [ AUTUMN  Jun 04, 2015 ]
Really depends on the application. I have mine located under the front passenger seat - there is no rear seat to speak of so the unit does not slide around and I do not have it fastened down. If you have lots of room under a seat or are placing it in the rear cargo area of a SUV, etc. you probably will want to fasten it. See page six of the owners manual - you can find it on the Crutchfield website in the "details" section. [ JOHN  Jun 04, 2015 ]
It has two slotted brackets that hold it to the floorboard of your vehicle. Normally there is sufficient room underneath the seat and I highly recommended putting it under the driver seat. [ STEVEN  Jun 04, 2015 ]
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Jeff  May 29, 2015 ]  Staff
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your gear. They will be able to pull up the Boss 470 and see if this will integrate. If it does not, then they will also be able to discuss other options with you. [ Jeff  Mar 06, 2015 ]  Staff
According to page 7 in the Kenwood instruction manual the KSC-SW11 will work without the remote connected. Text from page 7: "The sound is output even when the remote control unit is not connected, but the operations described in this section are not available. In this case, the volume, cut-off frequency and phase are set to the predetermined default conditions, with which the cut-off frequency is 125 Hz and the phase is 0º (positive)." [ (unknown)  Feb 05, 2015 ]
I just set the unit controls to a mid range, and then use the head unit controls to adjust. I think that you need the unit controls set at something, and the head only adjusts from zero to that setting. I like it, it is in the cab of a diesel puller motor home, and it makes all the difference. [ scott  Jan 26, 2015 ]
I would think what you are suggesting would work but one thing to consider, it is much easier to fine tune your subwoofer from the hand held remote that going into the features on the deck. I did the same thing on my home audio system. I turned off my subwoofer controls on my receiver and did all my fine turning on the subwoofer itself. Using the hand held remote lets you dial in the cross over and volume very easily while listening to the music to optimize your sound and lets you make small corrections as needed to make it perfect. I wired mine to the center console in my truck. Out of the way but always in hands reach when I need it. Dean [ DEAN C  Jan 25, 2015 ]
I use the remote as it provides quick and easy adjustments, use two sided tape to mount it [ STEPHEN M  Jan 25, 2015 ]
Obviously different head units have different controls. Mine is mated to a Kenwood head unit with both tone controls and an equalizer. However, there are additional adjustments to the subwoofer that only the remote allows you to do. Specifically, you can adjust the volume to get the desired level of bass without resetting your head unit. In my case 95% of what I listen to are CDs copied to a USB drive. Sound levels vary from disc to disc, as do bass levels. Having the remote at my fingertips enables me to adjust as desired. Another benefit of having the remote visible is this: my head unit has one in line fuse. However, it became necessary to add extra in-line fuses, acting as a relay, between the subwoofer, amplifier and head unit. When one of those relays (fuses) blows, the remote control for the sub doesn't light up. That makes diagnosis easy, as well as the fix. In my case, I found that there is sufficient fluctuation in my truck's power output to warrant adding those fused relays. Better safe than sorry. Easy to do and cheap protection. Hopefully this answers your question. I say use the remote and install it in an easily accessible location. Mine is attached to the console on my Excursion, next to the drivers seat. That works great for me. Good luck and enjoy your new stereo! PDR [ PAUL D  Jan 24, 2015 ]
You to adjust this setting. Volume affects only the volume of the subwoofer. Frequency adjusts the crossover only, it has nothing to do with volume. There is no "max" for frequency, that only sets the wavelength of notes that come from the sub versus other speakers in the vehicle. [ PAUL D  Feb 09, 2014 ]
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Jeff  Feb 08, 2014 ]  Staff
I purchased the refurbished unit 6 months ago. It looked brand new and sounds great, no issues. [ David  Mar 11, 2017 ]
I have purchased several refurbished kenwood products over the years from amps, subs, powered subs and stereos. They have all looked new and have had ZERO issues. In fact that's how I prefer to buy to save some of my hard earned money. [ Martina  Mar 07, 2017 ]
Ive bought tons of refurbished equipment with great results. Refurbished is when something just wasnt quite right( capacitor, fuse, some other electronic component inside a unit) and it goes back to the factory for inspection, repair and testing. Most of the time you can return it if you have problems regardless with Crutchfield. [ derek  Mar 07, 2017 ]
Sales is really good at setting up what you're buying with your specific car, if your factory stereo supplies a power antenna / amp signal, rca outputs/ or use speaker connections for the input side you should be OK,but again. Crutchfield is the one to ask. I had an aftermarket stereo, so it was the setup for me. [ derek  Nov 01, 2016 ]
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Jeff  Dec 09, 2014 ]  Staff