Rockville USS8 8" 600W Slim Under-Seat Active Car/Truck Subwoofer, 150W RMS, Built-in Amp, 3 Ohm, CEA-2006 Compliant, Bass Knob, for Tight Spaces
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FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Monday, Mar 2
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Size: 8 inch
Style: Subwoofer Sub
Features
- SLIM & COMPACT: At just 2.9" tall, this sub fits easily under most car and truck seats-ideal for space-limited installations without sacrificing bass.
- BUILT-IN AMP: Features a powerful 150W RMS Class A/B amplifier with PWM MOSFET power supply and auto turn-on via high-level inputs.
- CUSTOM SOUND CONTROL: Fine-tune your audio with subsonic filter (20-50Hz), low pass filter (50-150Hz), bass boost (0-12dB @ 45Hz), phase control, and adjustable input sensitivity.
- CEA-2006 COMPLIANT: True 150W RMS power rating verified by third-party testing for reliable performance and accurate output.
- FULL INSTALL KIT INCLUDED: Comes with subwoofer level control knob, mounting hardware, RCA and high-level inputs, plus thermal and short protection circuits for safe operation.
Brand: Rockville
Speaker Maximum Output Power: 600 Watts
Frequency Response: 15 Hz
Connectivity Technology: RCA
Audio Output Mode: Stereo
Input Voltage: 5.6 Volts
Mounting Type: Under-Seat Mount
Material: Plastic Or Metal
Model Name: USS8
Speaker Type: Subwoofer
Special Feature: Protection
Recommended Uses For Product: car
Compatible Devices: Smartphone, Laptop, MP3 Player
Subwoofer Diameter: 8 Inches
Unit Count: 1.0 Count
Color: Black
Included Components: Remote bass knob and mounting hardware
Product Dimensions: 13.6"D x 9.9"W x 2.9"H
Item Weight: 12.3 Pounds
Impedance: 3 Ohms
Is Waterproof: FALSE
Warranty Type: Limited Warranty
Number of Items: 1
Control Method: Remote
Wireless Communication Technology: No Wireless Communication Technology
Speaker Size: 8 Inches
Power Source: Battery Powered
Signal-to-Noise Ratio: 82 dB
Woofer Diameter: 8 Inches
Water Resistance Level: Not Water Resistant
Audio Driver Type: Dynamic Driver
Audio Driver Size: 8 Inches
Subwoofer Connectivity Technology: Wired
Number Of Circuits: 1
Number of Power Levels: 1
Specific Uses For Product: In-car audio system
UPC: 811080027371 811080027388
Style: Subwoofer Sub
Indoor/Outdoor Usage: Indoor
Manufacturer: Rockville
Shape: Rectangular Prism
Set Name: 1
Item Weight: 12.25 pounds
Department: Car Electronics
Item model number: USS8
Is Discontinued By Manufacturer: No
Date First Available: March 24, 2017
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Mar 2
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
It is not competition bass quality. Under $100 both sub and amp, and it will slide under or behind your seat. Well worth the money. My truck had zero bass and I needed an upgrade, but I have very limited space. 2024 Ford Ranger. Completely hidden and gives me great sound. Again, its not competition bass. To note, its been working great since summer 2023.
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Reviewed in the United States on September 19, 2025 by Adam kennedy
I bought this specific subwoofer because it would fit underneath a seat in my Bayliner 175 boat. No, this sub will not make your nose itch but it adds some good bass to my boat which I didn't have before and happy with my purchase so far. It wasn't a terribly difficult install but with this being a boat, there were not a lot of cable routing options and that was the biggest challenge. I had purchased the Rockville RWK10 10 Gauge Amp Installation Kit separately but ended up having to run around town anyway because most of the wires in that kit were not long enough for my application (for a boat). I like the fact that the sub turns on and off with my head unit power. I'm glad I could find an under seat solution and just as happy with the added bass with a little thump.
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Reviewed in the United States on August 18, 2023 by Greg H Greg H
I installed this in my 2019 tacoma. It is too thick to go under the seat, but will fit behind the fold down back seat of my extra cab. It gives just enough bass for my tastes. (70s rock, 90s hip hop) If you want your vehicle to rattle, then this is not for you. Installation was super easy, and the remote level adjustment is super handy.
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Reviewed in the United States on February 5, 2024 by derwood2
Fits well under the passengers seat in a 2013 Toyota Corolla. I wanted to fit it under the driver's side but the yaw sensor was in the way and I didn't want to remount it. It's a good balance between nice bass and I can still tune it down for when the child is in the car. I haven't noticed any clipping or dropout. Installed super easy off a Kenwood deck. I'm not an audiophile but I am a musician and the clarity is quite good above 70-80 hz. The lower ends get a little muddy but the lpf works a treat if you'd rather clear sound than rumbles.
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Reviewed in the United States on April 17, 2022 by Cory Conundrum
Do not I repeat do NOT buy from Rockville Audio!!!!! I bought this subwoofer and got it installed professionally. It seemed to work from the start, but then a week later, my car battery starting dying. I have a newer car so I didn’t think it was my battery that was bad. I thought it was nothing until my battery started dying every time I would go into my car to drive somewhere. I thought it might be the subwoofer so I took my car back to where I got the subwoofer installed. They tested the subwoofer and they found out it was defective and that’s why my car battery was dying. I had to pay to get the subwoofer uninstalled and then pay for shipping to send it back to Rockville. I also had to pay $400 for a new car battery because of their faulty product. I told them I just wanted to return the subwoofer since I originally wanted the 10” but it wasn’t in stock until I went to return the 8”. I even wrote a note inside the box when I shipped back the subwoofer stating I didn’t want them to repair this broken product and I just wanted to return it. A few weeks later, I got the subwoofer back STILL BROKEN and called customer service explaining everything and how I just wanted my money back since I bought the 10” Rockville subwoofer and that is what I wanted in the beginning. Also, since they claim they have a 1 year warranty on all their products I didn’t think there would be any issues. Jake and Gayle in their customer service were so rude and denied giving me my money, claiming the warranty didn’t work for my situation somehow. I spent hours on the phone with them and still didn’t get any help! All they said they could do was try and fix the broken product I had again. I am completely dissatisfied and not trusting companies “warranty’s” again. I will never be buying another Rockville product.
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Reviewed in the United States on March 1, 2022 by Ma T
*3 MONTH UPDATE* The sub was great at first, but has begun cutting out randomly. It's not going into protect mode, so I'm assuming maybe a voice coil wire is coming loose or something. It coincided with running the gain up pretty high, but I would think a powered sub should survive anywhere in its amp's operating range. Reduced to 3 stars. You might have better luck at a lower gain setting and light use. I bought this sub with the intention of filling in the low end of my audio system in my 99 Suburban. I was really just looking for something that would allow me to tune the bass out of my door speakers in order for them to sound less muddy. I'm not an audiophile, but I do enjoy my music. This sub served my purpose well. So far it sounds great. It's not a heavy hitter, but if you're just looking to bring a little low end to a factory sound system that's lacking, this is a good bet. It has high level and low level inputs which seems pretty common on these powered woofers. I'm using low level from my Pioneer double din. Time will tell, but for it's size and slim profile it does great. Mounted it under my second row seats. The remote gain control is another nice feature.
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Reviewed in the United States on September 2, 2018 by Jeff R Jeff R
Installed in a 2005 Chevy Colorado with a Sony xav-602BT face unit. The install was very simple (I watched a few online videos because I’ve never done it before) and it took about 1.5 hours. The sound was super crisp and clear with some pretty serious “thump”. It fit under the back seat just fine with another 2” or so to spare. Seriously, I am so impressed with the sound and for the price… 5 stars for me, I would buy again for sure. Rockville puts out a great value product.
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Reviewed in the United States on March 12, 2023 by Angelique Archuleta
Got a good amount of bump for a single 8 inch. It's not going to pull 170 dB but it's got a good overall quality. So by the time you got a amp kit( 8 awg is the recommended one and as big as your going to get in ) you got say $150 in it. So if you bought a cheap amp +subwoofer +box , you'll have more in everything than what you've got in this rockville. It's got excellent build quality and easy to adjust Phillips turn screws. Very happy for the ten min I played with it before permanently installing it.
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Reviewed in the United States on April 16, 2023 by Amazon Customer