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Kenwood KFC-XW800F - 8" Subwoofer

Q: 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.

Q: 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.

Q: 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.

Q: 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.

4.2/5

Product ID: 392896479

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Details

Brand
Kenwood
Speaker maximum output power
600 Watts
Frequency response
500 Hz
Connectivity technology
Bluetooth
Audio output mode
Surround

⚡600W peak power handling

🔊8" shallow mount subwoofer

❄️heat transfer cooling system

Frequently Bought Together

Kenwood KFCXW800F eXcelon 8" Shallow Subwoofer

ePathChina Amplifier Installation Kit, Car Audio Wire Wiring Amplifier Subwoofer Installation Kit, Speaker Cables Car Power Cord with Fuse Holder (8 Gauge)

Description

🎶 Feel the bass, not the bulk — Kenwood’s power-packed subwoofer

BUILT TO LAST - Aluminum-cast basket and carbon-glass fiber cone for durability and clarity
PRECISION CONTROL - Super linear spider ensures tight, distortion-free bass response
COOL UNDER PRESSURE - Advanced heat transfer system keeps performance consistent and reliable
DEEP BASS SLIM FIT - 8" shallow mount design fits sleek setups without sacrificing punch
POWER THAT MOVES YOU - Handles up to 600W peak power for earth-shaking lows

The Kenwood KFC-XW800F is an 8-inch shallow mount subwoofer engineered for professional-grade bass performance. Featuring a carbon-glass fiber composite cone and butyl rubber surround, it delivers clear, deep sound with a frequency response of 40-500 Hz. With a peak power handling of 600 watts and a recommended RMS range of 50-150 watts, it’s designed for powerful yet controlled output. Its heat transfer system and aluminum-cast basket ensure durability and consistent performance, making it ideal for audiophiles seeking impactful bass in a compact form.

Have a Question? See What Others Asked

whats the minimum encloser for this sub?

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

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

Would this be better sealed or ported?

Common Questions

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