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NVX

NVX QBUS8P 300W Peak (150W RMS) Amplified and Loaded 8" Ported Under Seat Quick Bass Universal Subwoofer System with Remote Bass Knob

  • Based on 65 reviews
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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon
Arrives Tuesday, Jul 28
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Size: 150W RMS 8" Ported


Features

  • Space Saver - The combination of a built-in 300W amplifier that powers the 8 subwoofer makes this ideal for spatially challenged vehicles.
  • Variable Low-Pass Filter - A low-pass filter is an electronic circuit that removes all the notes below the filter's frequency setting. You will use the low-pass filter to primarily keep high notes out of your subwoofer. Adjust it from 50-150 Hz to best fit your system.
  • Ease of installation - Takes either speaker wire (High-level) or RCA cable (low-level) inputs. This makes connecting the QBUS8P to your radio easier since it's compatible with both factory AND aftermarket units!
  • Automatic Turn-On - This circuit automatically turns the QBUS8P on whenever it senses an audio signal. This eliminates the need to run a remote turn on wire making installation a breeze.
  • Variable Bass Boost - Variable Bass Boost allows you to adjust the low bass within the boost range to just the way you like it.

Description

NVX - Elevating Your Audio Experience For over a decade, NVX has been a trailblazer in the car audio industry. Proudly engineers premium car audio in the USA. Committed to exceptional sound, our precision-crafted products include amplifiers, speakers, subwoofers, and more. Trust NVX to transform your drive with top-tier technology and the perfect harmony of American craftsmanship. Embrace the thrill of superior sound with NVX on every journey. Visit the Store Visit the Store

Brand: NVX


Speaker Maximum Output Power: 300 Watts


Frequency Response: 50 Hz


Connectivity Technology: RCA


Audio Output Mode: Mono


Audio Output Mode: Mono


Mounting Type: Under-Seat


Enclosure Material: Glass


Speaker Type: Subwoofer


Antenna Location: To improve car audio


Subwoofer Diameter: 8 Inches


Color: red


Is Waterproof: FALSE


Warranty Type: Limited


Control Method: Remote


Speaker Size: 8 Inches


Woofer Diameter: 8 Inches


Tweeter Diameter: 1 Inches


Water Resistance Level: Not Water Resistant


MP3 player: No


Battery Average Life: 1 days


Controller Type: Remote Control


Unit Count: 1.0 Count


Item Dimensions D x W x H: 13"D x 9.4"W x 3.2"H


Compatible Devices: Desktop


Compatible with Vehicle Type: Car


Power Source: Corded Electric


Brand: NVX


Model Number: qbus-parent


Model Name: qbus8p


Built-In Media: Built-in 300W amplifier, 8" subwoofer, variable low-pass filter, variable bass boost, wired remote bass level control, 8 gauge power and ground wiring, LED power and protect indicators


Number of Items: 1


Customer Package Type: FFP


UPC: 810021844435


Manufacturer: NVX


Age Range Description: Adult


Speaker Maximum Output Power: 300 Watts


Input Voltage: 6 Volts


Frequency Response: 50 Hz


Number of Audio Channels: 3.0


Connectivity Technology: RCA


Wireless Technology: Bluetooth


Subwoofer Connectivity Technology: Wired


Connectivity Protocol: RCA


Audio Driver Type: Dynamic Driver


Audio Driver Size: 8 Inches


Number Of Circuits: 1


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jul 28

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.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Great sub
Size: 150W RMS 8" Ported
Sounds great. I bought the 8” model. Overly surprised how hard it hits. Well worth the money. Hopefully it lasts for a long time
Reviewed in the United States on May 28, 2026 by Rebecca E. Youngblood
    • Amazing sound super compact.
Size: 150W RMS 8" Ported
Amazing sound for a small compact unit. Can’t get an easier setup!! Was skeptical with getting an 8” sub but this did not disappoint. I was only looking to add low range sound to my music and make the drive to work more enjoyable, while fitting under my 2021 Colorado back seat. But it definitely out performs. And can’t beat the value. ... show more
Reviewed in the United States on February 14, 2026 by The Salty Nest
    • Fantastic amp sub combo!
Size: 150W RMS 8" Ported
First off let me say this is my third NVX product and I would compare them to alpine products for a much more affordable price. This NVX sub amp combo was super easy to install and sounds great! If you are looking to round out the over all sound of your vehicle (not rattle doors) then this will work great. It’s a big improvement to my 2012 F150. One thing I didn’t understand was the on off switch on the amp, but you will want to leave it off if you have a remote wire from your stereo to the REM input on the amp. Tuning this wass super easy with built in knobs. It took me about 1 hour to install everything. Overall very happy! ... show more
Reviewed in the United States on June 28, 2022 by Brian
    • Perfect
Size: 150W RMS 8" Ported
Review Image by Amazon Customer
I just need it to fill n some notes. It’s more of a mid bass woofer then an actual sub. I’m very content
Reviewed in the United States on May 12, 2022 by Amazon Customer
    • May not fit under seat so worth it
Size: 150W RMS 8" Ported
This thing is perfect, sounds amazing
Reviewed in the United States on February 1, 2026 by mark
    • Producto excepcional
Size: 150W RMS 8" Ported
Lo instalé excelente producto ,lo volvería a comprar .
Reviewed in the United States on April 12, 2026 by Walterin
    • Amplifier
Size: 150W RMS 8" Ported
It was broken upon arrival
Reviewed in the United States on December 21, 2025 by Bailey B.
    • You get what you pay for!
Size: 150W RMS 8" Ported
Took an afternoon for an easy install under the front seat. Multiple methods of input made it easy to connect to existing head unit. The quality of sound is just what I was looking for as it hits low and tight. This little guy is NOT made to shake the car, it is merely to enhance sound quality. I would recommend as a cheap and space saving solution if your car is missing the lows. ... show more
Reviewed in the United States on June 11, 2022 by Tzwol

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