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Kenwood Excelon KFC-XW800F

Shallow-mount 8" 4-ohm subwoofer

9 Reviews | 6 questions - 7 answers


Our take on the Kenwood Excelon KFC-XW800F

The Kenwood Excelon KFC-XW800F 8" "flat" subwoofer produces serious bass output in the hard-to-fit areas of your compact car or truck. And this shallow-mount sub measures under 3 inches deep, so you can get creative with your installation.

The Kenwood Excelon KFC-XW800F 8" "flat" subwoofer produces serious bass output in the hard-to-fit areas of your compact car or truck. And this shallow-mount sub measures under 3 inches deep, so you can get creative with your installation.

The carbon-glass fiber cone employs a honeycomb pattern to deliver quick response in demanding conditions without flexing. The beefed-up rubber surround maintains control over the cone, minimizing distortion caused by resonance. A die-cast aluminum basket offers a rock-solid housing with plenty of venting to keep the heat down. The silver-plated push terminals offer convenient connections and provide excellent signal transfer.

To drive this single subwoofer, we recommend a mono amplifier rated between 120 and 225 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Priced per speaker

Product Highlights:

  • 8" 4-ohm shallow-mount subwoofer
  • carbon-glass fiber composite cone with butyl rubber surround
  • cast aluminum basket
  • power range: 50-150 watts RMS
  • peak power: 600 watts
  • frequency response: 40-500 Hz
  • sensitivity: 78 dB
  • mounting depth: 2-3/4"
  • sealed box volume: 0.5 cu. ft.
  • ported box volume: 0.5 cu. ft.
  • grille not included
  • warranty: 2 years
  • Our 60-day money-back guarantee

What's in the Box:

  • One 8" SVC Woofer
  • Rubber concealing ring (installed)
  • Self-adhesive foam strip
  • 8 Mounting screws
  • "Kenwood" logo sticker for woofer
  • "eXcelon logo sticker for woofer
  • Cardboard template
  • Instruction Manual (Eng/Fre/Spa)
  • Warranty Card

Running at 80 Hrz and up Sounds very clean

kungfucious, Carlsbad, CA


Kenwood Excelon KFC-XW800F Reviews

Average Customer Review(s):

(9 Reviews)

Great Sub for the money, Fits stock enclosure, excellent bass

Alan from Huntsville, AL on 8/20/2018

Crutchfield Customer Review (What's this?)

Excellent sub for the price and fit perfectly into the existing Tundra enclosure (Crewmax cab w/JBL system) and used 1/2 in. foam weatherstripping to increase the depth and worked amazingly. The customer service staff at Crutchfield was amazing as well in providing me with all of the details needed to make this work. Back to the KFC-XW800F...It is a perfect complement to the other components and the new amp. I would HIGHLY recommend anyone with the factory JBL system who is upgrading to use this driver, as it is accurate, nice tight bass, clean and distortion free and drops into the factory enclosure (I added some poly fiber fill into the box to give it less resonance) . Two thumbs up and saved a boatload on an aftermarket enclosure.

Pros: Nice tight bass, handles tremendous power, sounds like it's much bigger

Cons: None

using as mid bass

kungfucious from Carlsbad, CA on 6/28/2014

Crutchfield Customer Review (What's this?)

Running at 80 Hrz and up Sounds very clean



Terrific for what it is

Gary from SLC UT on 5/23/2014

This really is an impressive little sub given its dimensions and specs. I powered it with 150w RMS from a Rockford Fosgate P300 and installed it in a sealed MDF box I made with exactly .5 cubic feet. It was one of the only subs I could fit under my backseat, which is why I bought it. It really complemented my Infinity components up front and produced very clean, tight bass. It's obviously not as powerful as a quality 10" or 12" in a proper enclosure, but it blew the Boss BASS1400 completely away that I tried for a couple days and couldn't stand. The Boss unit seriously lacked sound quality and seemed oriented towards teenagers who want the world to know they have a subwoofer but can't afford something decent. With a proper enclosure and amp, the Kenwood is approaching audiophile sound-quality. I got complements from friends who are true audiophiles and even one who is a professional DJ--but it's worth noting that the inside of my truck is tiny and I listen mostly to bass-heavy rock (i.e. Tool) and no rap.

Pros: Size, price, sound quality

Cons: Not a full size sub


DJ BONEZ from Rockville, MD on 2/27/2014

I like my system (highs, mids & lows) all to be on point. The Kenwood XW800F has taken my system to that point.

Pros: Worth every dime.

Cons: They don't come in pairs.

I like it

Jjkinsd from San Marcos, CA on 5/16/2012

Crutchfield Customer Review (What's this?)

This sub does exactly what it is advertised to do. I had the need to build a custom, shallow odd shaped box (sealed) to fit where a sub is not supposed to and this fit the bill. If I were able to fit the 10" version, I would have but the 8" sounds great. I was just looking to fill in the bottom end (mostly rock/punk/alternative) and I am very pleased with my selection. I am feeding it with a kicker 140w @ 4ohms and so far this seems to be a good match. I couldn't quite get the recommended .5 cu ft, closer to .4, but used polyfil, made sure the box is well sealed and the result is good clean full sound. Great sub for applications tight on space.

Pros: Shallow mount, quality construction, good sound.

Cons: None

Replaced stock sub in my 1999 Mercury Mountaineer

TommyA from The Dalles, Oregon on 10/19/2011

I needed a replacement sub for my blown stock sub in my 1999 Mercury Mountaineer. The stock sub is 8" and is pretty shallow. Only option I saw were the MTX, a JL audio, a Pioneer Shallow Mount, and this Kenwood. The Mach audio system has a 85w RMS amp(150w Peak), I didn't think this speaker stood a chance because it had lower db's than the other speakers that would fit, which means it needs more watts to put out the same sound. Anyways coming down to it all I found a tutorial on how to get the old sub out, and the screw that screws into the back of the stock speaker magnet. Really simple job to replace, I did it all in under 1 hour. I found a plug at True Value for 30 cents that filled the hole that was left after I put the aftermarket sub in. Very helpful info is available on online forums for those wanting to change the stock sub in expeditions, explorers, mountaineers.




sirheck from Oklahoma on 5/28/2011

Paired this with a pioneer GM5400t amp, which is rated at 380 watts x1RMS at 4 ohms and is CEA compliant. It hits hard but the Pioneer amp runs hot.



This sub fit a shallow area/enclosure.

Happy Camper from Smyrna, GA on 5/23/2011

Crutchfield Customer Review (What's this?)

This sub fit into my stock sub housing for my 98' Mercury Moutaineer's stock Mach audio system which is located on the passenger side spaced behind the rear wheelwell. It has a more shallow depth compared to the majority of subwoofers available in 8" but the sound is very good. Comparing the original sub with this Kenwood sub, it's pretty evident why aftermarket speakers are the way to go. The quality in appearance alone amazed me. The sales rep, Adam via instant messaging, was very helpful in helping me choose the right subwoofer to make the replacement installation simple. It took me less than an hour to finish and I'm really enjoying my tunes again. Thanks!!



Great for an 8" sub

James from Southern California on 9/21/2009

I put this sub in a custom box I built for an 07 Frontier crew cab. The box has a little over .5 cubic feet. The key to making the sub sound great is having a good amp to go with it. I origanally hooked up a cheesy 300 watt amp and I couldn't even hear the sub. I ended up getting the Kenwood KAC-6104D 600 watt mono sub amp. That made all the difference. The sub sounds great. It doesn't hit like a ten but it fills in the bass that is missing from your system.




Hands-on research

Product Research

Enclosure Compatibility


Flat Subwoofer: The Kenwood eXcelon flat subwoofer design is approximately 40% slimmer in height than a standard subwoofer. This makes them ideal for installation in the tightest of spaces such as behind or under the seat of a pickup truck.

Carbon-Glass Fiber Cone: The eXcelon flat woofer uses a carbon-glass fiber honeycomb cone which allows the woofer to be efficient and durable at the same time.

Rubber Surround: The Kenwood woofer features a smooth linear rubber surround for added durability and increased excursion resulting in exceptional deep bass response.

Super Linear Spider: The flat woofer utilizes a super linear spider for maximum control over the woofer's linear motion to improve overall sound quality.

Heat Transfer System: The Kenwood woofer features an advanced Heat Transfer System designed specifically for its slim-design to provide proper ventilation to keep the woofer cool.

Aluminum-Cast Basket: The woofer is housed in a cast-aluminum basket for increased rigidity and long-lasting reliability.

Spring Terminals: The flat woofer utilizes a pair of silver-plated spring terminals on one side of the woofer for connection to your amplifier's speaker wiring. The spring terminals will accept up to 10 AWG speaker wire.

Concealing Ring: The eXcelon woofer comes supplied with a removable, rubber concealing ring used to hide the woofer's mounting screws for a neat and professional looking installation. The concealing ring increases the top mounting height to 0.875".

Enclosure Compatibility

Sealed Box Volume: The sealed box size recommended by Kenwood is 0.5 cu/ft.

Vented Box Volume: The vented box size recommended by Kenwood is 0.5 cu/ft. One 1-3/16" x 11" x 17-1/8" (long) slot port should be used with a 0.5 cu/ft enclosure.

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?

Brand [ Jorge  Dec 26, 2018 ]
Customer top pick. [ Dennis  Jun 08, 2018 ]
Because it will fit well with out too much trouble. Fingers crossed. [ John  Oct 06, 2016 ]
Fit space available and was in stock. [ Chris  Mar 15, 2016 ]

6 questions already asked

The Kenwood has a recommended power range of 50-150 watts RMS so, yes, you will need an aftermarket amplifier to power it properly. For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service: [ Ryan  Jan 21, 2019 ]  Staff
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. [ Krissy  May 11, 2018 ]  Staff
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you. [ Kenny  Jul 04, 2017 ]  Staff
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you. [ Kenny  May 01, 2017 ]  Staff
I returned the speakers, because they didn't fit my application. [ jeff  Jun 29, 2015 ]
I have this shallow-mount 8 as a replacement for my ford OEM unit. i assume you probably have the same OEM mount. so yes, it can replace yet. As for the sound, it's fantastic for shallow mount 8. extremely clean. you will not get SUPER HARD hits, but can get pretty hard, very clean, hits. [ EVAN  Jan 23, 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  Jan 15, 2014 ]  Staff