is everything in the box needed for Installation?

Yes, with the accompanying Amp Kit. Its complete along with rubber insulation you gave to attach yourself. I would suggest electrical tape, wire strippers, and a pair of terminal/electrical pliers (I apologize if you are already aware.).

Has anyone added a second sub to their system?

Yes. I used RCA splitters and installed two in my Mitsubishi Montero. Sounds amazing and have been going strong for 3 years. I tried to split the remote control using a telephone line splitter but got weird feedback when I tried to do that, so I just went without the remote control.

How difficult is this to install?

It's easy to install if you understand stereo systems and how to run the wires. The hardest part is getting to your stereo. Not sure if you have experience or not installing systems. If you do, its easy.

If I got splitters for both the rca and remote control (telephone jack), can I install one sub under each of the front seat?

Yes. I split my rca signal and installed 2 of the speakers.

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Rockville SS8P 400 Watt Slim Under-Seat Powered Car/Truck Subwoofer Sub+Amp Kit

Product ID: 728711826

Details

Audio output mode
Stereo
Brand
Rockville
Compatible devices
Car Audio
Connectivity technology
RCA
Model name
SS8P
Mounting type
Tabletop Mount

⚡PWM MOSFET Power Supply

🔊400W Peak Power

❄️Cast Aluminum Cooling

Description

🎶 Elevate your drive with bass that commands attention—under-seat power, over-the-top impact!

COOL RELIABLE - Cast aluminum enclosure ensures your subwoofer stays cool under pressure, delivering consistent bass without overheating.
SLIM POWERHOUSE - 400W peak power in a sleek 2.8" slim design fits discreetly under your seat for that clean, professional look.
BUILT TO PROTECT - Thermal, short, and overload protection circuits with LED indicators keep your system safe and performing at its best.
CUSTOM BASS CONTROL - Adjustable input sensitivity, bass boost up to 12dB, and phase switch let you tailor your sound to perfection.
PLUG PLAY PRECISION - Includes premium 10-gauge amp installation kit with 100% copper wiring and gold-plated fuse holder for flawless connectivity.

The Rockville SS8P is a slim, 8" powered subwoofer delivering 400W peak and 100W RMS, designed to fit discreetly under car or truck seats. Featuring a cast aluminum enclosure for superior cooling, PWM MOSFET power supply, and advanced protection circuits, it ensures powerful, reliable bass. The package includes a premium 10-gauge amp installation kit with 100% copper wiring and gold-plated fuse holder, making installation seamless and professional-grade.

Specifications

ASIN	B079PSSD6N
Audio Driver Size	8 Inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Box Contents	1) Rockville SS8P 400 Watt Slim Under-Seat Active Powered Car/Truck Subwoofer Sub, 1) Rockville RWK10 10 Gauge Amp Installation Kit ANL Fuse Holder 100% Copper RCA
Brand Name	Rockville
Colour	silver
Compatible Devices	Car Audio System, Truck Audio System
Compatible with Vehicle Type	Car, Truck
Connectivity Protocol	RCA
Control Method	Remote
Controller Type	Remote Control
Customer Reviews	4.4 4.4 out of 5 stars (1,501)
Impedance	2 Ohms
Is Waterproof	false
Item Weight	11 Pounds
MP3 player	No
Manufacturer	Rockville
Maximum Speaker Output Power (in watts)	400 Watts
Model Name	SS8P
Model Number	SS8P+RWK10
Mounting Type	Tabletop Mount
Network Connectivity Technology	RCA
Number of Audio Channels	2 1
Power Source	Battery Powered
Processor Count	1
Product Features	Subwoofer, Waterproof, USB Charging, Built-in Microphone
Signal-to-Noise Ratio	90 dB
Speaker Size	8 Inches
Speaker Type	Subwoofer
Specific Uses For Product	Under-seat installation in cars or trucks
Subwoofer Connectivity Technology	Wired
Subwoofer Speaker Diameter	8 Inches
Tweeter Diameter	1 Inches
Wireless Technology Type	No Wireless Communication Technology
Woofer Driver Diameter	8 Inches

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