Will this fit under the front power seats of a 2008 F250?

Not sure about this particular truck, but it does fit under the front seat of my 07 Tundra. Sounds great too !

Can two subwoofers (one under driver seat and one under passenger seat be used with a factory head unit? if so, will it require any additional items?

Honestly one is plenty but if you want to double up on it your gonna need to wire a lot of things

Can you hook 2 together. Is ther a special harness you need. Thank you

You can split the input signal in two. You would DIY a harness.

The om says, the auto power-on feature is available only when using high level inputs. how does the sub come on using low level rca inputs?

Hello no, with the RCA out puts is no power on automatic just in high input

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Rockville RW68CA 6x8 Slim Under-Seat Active Powered Truck/Car Subwoofer

Rockville RW68CA 6x8 Slim Under-Seat Active Powered Truck/Car Subwoofer

Product ID: 403146238

Details

Audio Output Mode
Stereo
Brand
Rockville
Connectivity Technology
RCA
Frequency Response
20 hertz
Speaker Maximum Output Power
400 watts

📏2.83-inch ultra-slim profile

🔊400W peak power

🛡️Durable aluminum enclosure

€ 310.92

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Description

🎶 Compact Powerhouse: Big Bass, Zero Bulk!

TAILOR YOUR SOUND - Advanced controls including bass boost, phase switch, and subsonic filter let you customize your audio vibe.
POWER THAT MOVES YOU - Experience thunderous 400W peak bass that transforms every drive into a concert.
SLEEK UNDER SEAT FIT - Ultra-slim 2.83-inch design slides effortlessly under most seats—maximize space without compromise.
PLUG PLAY SIMPLICITY - Built-in amplifier means zero hassle—just connect and feel the bass.
ENGINEERED FOR ENDURANCE - Cast aluminum enclosure keeps your subwoofer cool and protected for long-lasting performance.

The Rockville RW68CA is a 6x8-inch slim under-seat active subwoofer delivering 400W peak and 100W RMS power. Its ultra-slim 2.83-inch profile fits discreetly under most vehicle seats, while the built-in amplifier simplifies installation. Housed in a durable cast aluminum enclosure, it offers advanced sound controls like bass boost and phase adjustment, making it a perfect upgrade for truck and car audio systems seeking deep, impactful bass without sacrificing space.

Specifications

ASIN	B09PLJYT66
Additional Features	Bass Boost
Antenna Location	For Music Players
Audio Driver Size	6 inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Best Sellers Rank	#27,206 in Electronics ( See Top 100 in Electronics ) #55 in Car Component Subwoofers
Brand	Rockville
Built-In Media	Remot
Color	Black
Compatible Devices	Smartphone, MP3 Player
Connectivity Protocol	RCA
Connectivity Technology	RCA
Control Method	Remote
Controller Type	Remote Control
Customer Reviews	4.2 out of 5 stars 105 Reviews
Enclosure Material	Aluminum
Frequency Response	20 hertz
Impedance	4 ohm
Input Voltage	12 volts
Is Waterproof	FALSE
Item Dimensions D x W x H	12.9"D x 32"W x 24.9"H
Item Type Name	Rockville RW68CA 400w 6x8 Slim Under-Seat Active Powered Car/Truck Subwoofer Sub
Item Weight	8.7 pounds
Manufacturer	Rockville
Model Name	RW68CA
Model Number	RW68CA
Mounting Type	Car Mount,Truck,Under Seat Mount
Number of Audio Channels	2.1
Number of Items	1
Power Source	Corded Electric
Signal-to-Noise Ratio	>90 dB
Speaker Maximum Output Power	400 watts
Speaker Size	8 inches
Speaker Type	Component
Specific Uses For Product	DJ
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	8 inches
UPC	819216028742
Unit Count	1 Count
Warranty Description	1 YEAR
Warranty Type	Limited
Wireless Technology	No Wireless Communication Technology
Woofer Diameter	8 inches

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