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(2) NVX QBUS8P

150W RMS Amplified and Loaded 8" Under Seat Quick Bass Universal Subwoofer System with Ported Enclosure

NVX
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• Low Profile Powered Ported Subwoofer System
• 150 Watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

Learn more about the qbus8p_2

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Description


NVX brand icon

Authorized dealer

NVX QBUS8P Highlights:

Ported Enclosure Design

The NVX QBUS8P is a ported subwoofer enclosure design. These specific types of enclosures, ported or vented, redirect sound from the rear of the cone and add it to the sound coming out of the front. This effect results in greater freedom of motion for the cone, making the bass louder than its sealed enclosure counterparts found on the market.

Concealed Installation

The NVX QBUS8P features a uniquely designed box enclosure. The enclosure itself features a compact enclosure design with the subwoofer placed in the center of the enclosure. The design of the enclosure allows for the loaded subwoofer enclosure to easily be installed under the seat of your vehicle. This means that the QBUS8P is easily accessible for on-the-go tuning but concealed in a discreet location inside your vehicle to deter theft. The under-seat-design of the QBUS8P is the perfect solution for 2-door vehicles and older vehicles that may not have been designed with audio system’s in mind.

Class D Efficiency

The NVX QBUS8P is powered by a Class D amplifier. Class D amplifiers are commonly sought after amongst consumers as this class of amplifiers tend to be more efficient than their Class A/B counterparts. Because Class D amplifiers are often found to be more efficient than the Class A/B counterparts, enclosures such as the QBUS8P can be scaled down to a much smaller size resulting in more installation options inside of your vehicle.

Bass Level Control

The NVX QBUS8P also comes equipped with a wired Bass Level Control knob. The knob can be found on the bottom of the amplified subwoofer enclosure. This feature allows the user to easily control and adjust the bass level of the subwoofer without unplugging the unit from the entire system.

NVX QBUS8P

300W Peak (150W RMS) 8" Under-Seat Powered Car Subwoofer System
Quantity: 1

Product Details:

  • 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

NVX QBUS8P

300W Peak (150W RMS) 8" Under-Seat Powered Car Subwoofer System
Quantity: 1

Product Details:

  • 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

Product history:

NVX (2)QBUS8P thumbnail
(newest, current model)
NVX QBUS8v2 thumbnail
(previous model, replaced by (2) NVX QBUS8P)
NVX QBUS8 thumbnail
(previous model, replaced by NVX QBUS8v2 (Ships as New Model QBUS8P))

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Specifications & Details


Subwoofer Amplifier Power Specifications
RMS Power @ 2 ohms
150 watts x 1 channel
Peak Power Output
300 watts x 1 channel
Amplifier Specifications
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 Specifications
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
Enclosure Specifications
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
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

NVX

Model Number:

(2)QBUS8P

Weight:

24.00lbs

Internal SKU:

qbus8p_2

Internal Product ID:

194733

Customer Ratings & Reviews


(2) NVX QBUS8P thumbnail image

5 star
89%
4 star
11%
3 star
0%
2 star
0%
1 star
0%



Durability
4.9
Value
5
Features
5
Design
5
Usability
5

Customer Photos & Videos


Customer Reviews

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The port makes all the difference!

The following review is for QBUS8P, which is a part of the bundle you are viewing.

I swapped out an SSL 8 inch powered sub for this ported NVX sub in my wife's Outlander. I have it positioned under the front passenger seat, with an RCA adapter to the factory headunit. Holy smokes, this sub blew the old sub out of the water! Obviously this thing isn't meant to shake mirrors, but the lows are much more pronounced, thankfully without any port noise. I've been running it for a couple weeks now and it started to really come alive a couple days after install. Very happy with this sub!

By Tim on March 2, 2022 Checkmark Icon Verified purchase

69 found this helpful


Better than the 8" competition sub in a full enclosure with a 900W amp

The following review is for QBUS8P, which is a part of the bundle you are viewing.

I had a classic VW convertible with an 8" competition sub on the rear package tray but with the top down you couldn't really get much bass out of it. Figured I would try this under the seat sub and was very surprised! I removed the sub on the package tray and will use just this one for my build. Very happy with it.

By Dean on July 7, 2022 Checkmark Icon Verified purchase

57 found this helpful


Not bad for limited spaces

The following review is for QBUS8P, which is a part of the bundle you are viewing.

Does a decent job for a small subwoofer. Not going to win any competitions buy definitely enough bass for me. I would recommend for anyone that does not have a lot of space for a subwoofer.

By Timothy on February 19, 2022 Checkmark Icon Verified purchase

57 found this helpful


Lounder then you think! Great value!

The following review is for QBUS8P, which is a part of the bundle you are viewing.

Easy to install and set up. Installed in a jeep patriot. Definitely louder then you think it would be. Adds just the right amount of bass at a great value. Feels well built and durable, everything it well protected. Would 100% recommend if your just wanting that little extra bass with your music with out breaking the bank.

By Justin on April 30, 2023 Checkmark Icon Verified purchase

48 found this helpful


This thing rocks

The following review is for QBUS8P, which is a part of the bundle you are viewing.

Purchased this NVX under seat powered enclosed 8" subwoofer, for one of my 1st Gen regular cab Tacoma pickups, because of the lack of cab space.
After installing this NVX unit, I was blown away at how awesome it sounds. It really brings the bass to my music, and in a small amount of space.
I definitely recommend this NVX enclosed powered subwoofer.
I highly recommend this product.
High quality, awesome sound ,and great price. Thanks you guys at Sonic Electronix !!

By Darrell on December 16, 2023 Checkmark Icon Verified purchase

27 found this helpful


The following review is for QBUS8P, which is a part of the bundle you are viewing.

Received in 3 days, fast shipping. Very good build quality and have some weight to it. As usual another great buy from Sonic, I haven’t been disappointed yet from these guys. Thanks!

By Tim on December 11, 2023 Checkmark Icon Verified purchase

27 found this helpful


The following review is for QBUS8P, which is a part of the bundle you are viewing.
By Miguel on May 3, 2024 Checkmark Icon Verified purchase

15 found this helpful


The following review is for QBUS8P, which is a part of the bundle you are viewing.
By Pavel on August 9, 2025 Checkmark Icon Verified purchase

7 found this helpful


Great value

The following review is for QBUS8P, which is a part of the bundle you are viewing.

Excellent bass for my small cab in my 67 c10

By Kevin on April 29, 2026 Checkmark Icon Verified purchase




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