NVX QBUS8P 300W Peak 8" Amplified Loaded Under Seat Universal Subwoofer System Ported Enclosure
NVX QBUS8P 300W Peak 8" Amplified Loaded Under Seat Universal Subwoofer System Ported Enclosure
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NVX QBUS8P 300W Peak 8" Amplified Loaded Under Seat Universal Subwoofer System Ported Enclosure

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NVX QBUS8P 300W Peak 8" Amplified Loaded Under Seat Universal Subwoofer System Ported EnclosureNVX QBUS8P 300W Peak 8 Amplified Loaded Under Seat Universal Subwoofer System Ported EnclosureNVX QBSTA 900W Peak 11 Quick Bass Spare Tire Powered Subwoofer System w Remote Bass Level ControlNVX QBUS10P 500W Peak 10 Amplified Loaded Under Seat Universal Subwoofer System Ported Enclosure
Size150W RMS 8" Ported

Key item features

  • Compact Design: This 8" amplified subwoofer system features a low-profile, ported enclosure, ideal for under-seat placement in spatially challenged vehicles, measuring 13" in length, 9.4" in width, and 3.2" in height.
  • Integrated Power: Equipped with a built-in Class D amplifier, it delivers 150 watts RMS and 300 watts peak power, providing crisp, clean bass to any audio system.
  • Flexible Connectivity: The system supports both speaker-level (high-level) inputs with signal sensing for automatic turn-on and silver-plated RCA (low-level) inputs, ensuring compatibility with factory and aftermarket head units.
  • Audio Customization: Users can fine-tune their sound with a variable low-pass filter (50-150 Hz), a variable bass boost (0 to +12 dB at 45Hz), and a wired remote bass level control.
  • Durable Construction: The subwoofer features an all-weather woven fiberglass woofer cone with a rubber surround and a heavy-duty die-cast aluminum alloy heat-sink for efficient heat dissipation.
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Specs

Rms power rating, 150 WWoofer size, 8 inSubwoofer type, Powered Car SubwooferBrand, NVXSubwoofer enclosure type, PortedImpedance, 4 ohm

About this item

Product details

The combination of a built-in 300W amplifier that powers the 8” subwoofer makes this ideal for spatially challenged vehicles. 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. 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!
  • Low Profile Ported Subwoofer System
  • 150 Watts RMS
  • Built-In Class D Amplifier
  • Variable Bass Boost
  • Speaker-Level Inputs
  • Wired Remote Bass Level Control
  • 8" Active Enclosed Low Profile Powered Ported Subwoofer System
  • Power Handling:
  • Peak: 300 watts
  • RMS: 150 watts
  • All weather woven fiber glass woofer cone
  • S/N Ratio: 91 dB
  • Ported Enclosure Design
  • Output Impedance: 2 Ohm
  • Adds crisp, clean bass to any system
  • Built-in Class-D Amplifier
  • Wired remote bass level control included
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +12 dB bass boost at 45Hz)
  • Speaker-level (high-level) inputs with signal sensing for automatic turn-on
  • Heavy duty die-cast aluminum alloy heat-sink for extreme heat dissipation
  • Silver-plated RCA level inputs
  • Silver-plated screw terminals
  • Input sensitivity:
  • Low Level Input: 150mV - 6V
  • High Level Input: 1V - 8V
  • Variable low-pass filter (50-150 Hz)
  • Phase Shift: 0-180°
  • Frequency response: 20-150 Hz
  • 8 gauge power and ground wiring is required for installation
  • Dimensions: Length: 13” x Width: 9.4” x Height: 3.2”
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
  • RMS Power @ 2 ohms - 150 watts x 1 channel
  • Peak Power Output - 300 watts x 1 channel
  • Amplifier Class - D
  • Number of Channels - 1 - Mono
  • Maximum Input Gauge Size - 8 AWG
  • Speaker Level Inputs - Yes
  • Built-in Crossover - Low-Pass (LP)
  • Low-Pass Crossover Frequency - 50 - 150 Hz
  • Signal-to-Noise Ratio - 91 dB
  • Bass Boost - 0 - 12 dB
  • Remote bass/level controller - Yes
  • CEA-2031 Compliant - Yes
  • Subwoofer Size - 8"
  • RMS Power Handling - 150 watts
  • Total RMS Power Handling - 150 watts
  • Peak Power Handling - 300 watts
  • Total Peak Power Handling - 300 watts
  • Woofer Surround - Rubber
  • Woofer Composition - Polypropylene
  • Frequency Response - 20 - 150 Hz
  • Subwoofer Design - Round / Circle
  • Box Type - Ported
  • Number of Subwoofers - 1
  • Box Style/Shape - Square/Rectangle
  • Height - 3.2"
  • Width - 13"
  • Depth - 9.4"
  • Box Exterior Color - Black
  • Box Finish - Aluminum
  • Final Wired Impedance - 2-ohm
  • Is Amplifier Wiring Kit included? - No
  • Parts Warranty Duration - 1 year
  • Labor Warranty Duration - 1 year
  • Warranty Provider - Manufacturer
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Specifications

Rms power rating

150 W

Woofer size

8 in

Subwoofer type

Powered Car Subwoofer

Brand

NVX

Warranty

Warranty information

1-year Manufacturer's Warranty

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Customer ratings & reviews

4.7 out of 5 stars
stars
55 ratings41 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars78% (43)
  2. 4 stars15% (8)
  3. 3 stars5% (3)
  4. 2 stars2% (1)
  5. 1 star0% (0)
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
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Showing 1-3 of 41 reviews

Sep 14, 2025
Reviewer name: jerrid
5 out of 5 stars
5 out of 5 stars review

best choice for this style bar none

i went with this one first for the price, then it having much more power than other options that are twice the price. the install for the speaker fit perfectly in my 2024 mazda 3 turbo hatchback, i even reused the original bolt that replaced my bose sub that came with the car. the DP switch, that you need for auto detect, wasnt set by default so i went a little mad trying to figure out why the speaker wouldnt power on. so if you have that issue check to see if its set to DP. also this think kicks! the bass is a huge improvement!

Review from sonicelectronix.com
Helpful?4DZX59UXK7TE287787401
Jul 19, 2025
Reviewer name: Sonny
5 out of 5 stars
5 out of 5 stars review

The best bang for your buck

I really like this discreet and hidden away in the spare tire area subwoofer. I installed this subwoofer in my 2025 VW GTI which comes with a Herman Kardon sound system and sub. The stock sub is basic and lackluster. I bought this one and installed it myself over the weekend and it exceeded my expectations. It shakes my rear view mirror and bass that you can feel. It works perfect in my hatchback. Worth every penny. This is the most powerful spare tire sub on the market. Highly recommend it.

Review from sonicelectronix.com
Helpful?4DZX59UXK7TE287787401
Feb 19, 2025
Reviewer name: MSC-OSC-LSC
5 out of 5 stars
5 out of 5 stars review

Surprising output

My expectations were fairly low for this unit, I have a factory JBL stereo in a 26 year old vehicle that was well ahead of its time and still sounds pretty decent, just had no low end due to no actual woofer. I honestly thought the highs would overcome the lows still but this little sub keeps up really well. Plays lower then expected, and has a good amount of rumble. This completes any factory systems that are missing a woofer This would upgrade any system that comes with a factory woofer. Durability is untold. Time will tell.

Review from sonicelectronix.com
Helpful?4DZX59UXK7TE287787401
Current price is $149.99
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