whats the minimum encloser for this sub?

Enclosure size effects how low a frequency the sub can produce, as does port size. There are many free programs like box-port design II that once you enter the speaker perimeters will show a graph of the expected low frequency curve. The important values are VAS=10.7L, Qes=1.015, Qts=.812, Fs=43Hz. The manufacture suggests a 1/2 cu ft sealed enclosure, and this yields an f3 about 50Hz with a 2db bump at 70Hz. Due to the high Fs frequency of this driver, a larger box only improves sound a small amount. Going smaller is a problem and will greatly hurt sound quality. This sub is excellent for general rock music, but electronic high bass rap music may not give you a super low bass punch that more expensive subs will. Also being only 8", there is just so much air that this piston can through. Due to the low efficiency of most subs, the dedicated sub amp should be about 10x the power of the main speakers.

Can i replace my factory sub in a 2008 ford expedition el with this one?

I wouldn't know if it fits you'll have to open the panel to see. Also verify that the factory amp has the right power to drive this woofer; if thats what you plan on using for power. My Dodge Nitro ended up being a dual voice coil so this woofer didn't work from me. Went with pioneer and had to put an aftermarket amp in also.

Can this be used with stock amplifier? I think its only 40W for the amp.

I do not think it would sound good with that amp.

Would this be better sealed or ported?

Absolutely SEALED. I originally engineered the enclosure with a port using a boxplot program for port size design. I even tried different frequency tuning with port size. You do get more extended bass from a ported enclosure, but the frequency curve is not as smooth. Think single note subwoofer, not the best for music. I ended up closing up the port and running an amp capable of providing adequate output. Speaker sounds great now. In short, NO PORT.

Kfc Xw800f 8 Subwoofer | Desertcart INDIA

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Description

🎶 Feel the bass, not the bulk – Kenwood’s 8" subwoofer redefines compact power!

ROBUST OUTPUT - Handles up to 600W peak power with a recommended RMS range of 50-150W for clean, punchy lows.
COOL RELIABLE - Heat transfer system and aluminum basket keep your subwoofer cool and built to last.
COMPACT POWERHOUSE - Super slim 2-3/4" mounting depth fits tight spaces without sacrificing bass impact.
SEAMLESS INTEGRATION - Removable gasket and flush mount design for a sleek, professional installation in any car.
PRECISION ENGINEERING - Carbon-glass fiber cone and super linear spider ensure tight, distortion-free bass control.

The Kenwood KFC-XW800F is a high-performance 8-inch shallow mount subwoofer designed for car audio enthusiasts who demand powerful bass in limited spaces. With a peak power handling of 600 watts and a durable aluminum-cast basket, it delivers deep, precise low frequencies (40-500 Hz) while maintaining cool operation through an advanced heat transfer system. Its carbon-glass fiber composite cone and super linear spider provide exceptional control and clarity, making it a perfect fit for small sealed enclosures and professional-grade sound setups.

Specifications

ASIN	B001ULS3DY
Additional Features	Dolby Enabled
Age Range Description	Adult
Antenna Location	For Home Audio Systems, For Surround Sound Systems, For Televisions
Audio Driver Size	8 Inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo, Surround
Audio output mode	Stereo , Surround
Battery Average Life	12 Hours
Brand	Kenwood
Built-In Media	KFC-XW800F
Color	Silver
Compatible Devices	Car Audio System
Compatible with Vehicle Type	& SUVs, Select Cars, Truck
Connectivity Protocol	Bluetooth
Connectivity Technology	Bluetooth
Connectivity technology	Bluetooth
Control Method	Touch
Customer Reviews	4.2 out of 5 stars 83 Reviews
Enclosure Material	Aluminum
Frequency Response	500 Hz
Frequency response	500 Hz
Global Trade Identification Number	00019048183477
Impedance	4 Ohms
Is Waterproof	False
Item Dimensions D x W x H	45.7D x 20.3W x 35.6H centimeters
Item Weight	2 Kilograms
MP3 player	No
Manufacturer	Kenwood
Model Name	KFC-XW800F
Model Number	KFC-XW800F
Mounting Type	Flush Mount
Mounting type	Flush Mount
Number of Audio Channels	1.0
Number of Batteries	1 12V batteries required.
Number of Items	1
Power Source	Battery Powered
Speaker Maximum Output Power	300 Watts
Speaker Size	8 Inches
Speaker Type	Subwoofer
Speaker maximum output power	300 Watts
Specific Uses For Product	In-car audio systems
Subwoofer Diameter	8 Inches
Tweeter Diameter	1 Inches
UPC	613815579663 019048183477
Unit Count	1.0 Count
Warranty Type	Limited
Wireless Technology	Bluetooth
Woofer Diameter	8 Inches

Reviews

A**N

Great sub for the price

23.09.2021

E**Y

Buy this Sub

12.05.2013

I**H

Small, Sturdy, Accurate, and Authoritative.

12.08.2015

W**M

Five Stars

24.10.2016

D**R

Lasted less then year . On factory system

4.12.2022

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