8" Quick Bass Universal System Powered/Amplified Subwoofer System

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• Low Profile Powered Subwoofer System
• 80 Watts RMS
• Built-In Class AB Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

Learn more about the qbus8

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

qbus8p thumbnail


OUR PRICE: $109.99

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Product Highlights

• Low Profile Powered Subwoofer System
• 80 Watts RMS
• Built-In Class AB Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control



Authorized dealer

General Features:

  • 8" Active Enclosed Low Profile Subwoofer System
  • RMS Power Rating:
    • RMS: 80 watts
  • All weather woven fiber glass woofer cone
  • Adds crisp, clean bass to any system
  • Built-in class AB 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:
    • Level: 110mV-0.5V
  • Variable subsonic filter (20-50 Hz)
  • Variable low-pass filter (50-150 Hz)
  • Phase Shift: 0-180°
  • Frequency response: 20-150 Hz ±1dB
  • 8 gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this powered loaded enclosure
  • Dimensions: 9-13/16"W x 13-9/16"L x 2-11/16"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product history:

NVX QBUS8P thumbnail
(newest, current model)
NVX QBUS8v2 thumbnail
(previous model, replaced by NVX QBUS8P)
NVX QBUS8 thumbnail
(previous model, replaced by NVX QBUS8v2 Under Seat Powered Subwoofer Enclosure with Integrated Amplifier)

Specifications & Details

Subwoofer Specifications
Subwoofer Size
RMS Power Handling
80 watts
Woofer Surround
Woofer Composition
Voice Coil(s)
90 dB
Frequency Response
20 - 150 Hz
Enclosure Specifications
Box Type
Number of Subwoofers
Box Style/Shape
Number of Terminals
Box Exterior Color
Box Finish
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details



Model Number:




Internal SKU:


Internal Product ID:


Product and How-to Videos

Customer Ratings & Reviews

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Customer Reviews

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Great value

After getting tired of seeing my Big Bro tossing money out the window trying to find a sub that mixes well with the factory SQ system in his Benz., I brought and installed this one for him while he was out of town. I drove his car for a week he was gone and loved it. once my brother returned home the first thing he notice was the nice clear non muddy bass he was looking for and exactly what was missing from his system. It was simple to install. I mounted in the trunk. He loved it so much he told the Benz Car Club his in about it and they all want one. So thank you NVX for making such a great product

By Daisy on January 10, 2013


found this helpful.

Great product

Awesome nothing like I expected ! It really surprised me lots of power !!!!

By Josh on October 27, 2013


found this helpful.

Awesome product

It might be little but it still hits hard, great value

By Dennis on November 4, 2013


found this helpful.

Not a good product

You get what you paid for. Product didn't add any bass to my ride. Waste of money.

By BONNIE on September 11, 2013


found this helpful.

Impressive punch from a 8 inch sub

I purchased this hoping to add some bottom end to my sound while driving my motorhome. First I mounted it on the wall beside the passenger seat. Everything vibrated and sounded bad. So I placed on the floor next the passenger seat and it sounded better so I screwed it down, and that really made a difference. I have a 8" inch powered sub from Sound Ordinance and this one sounds much better. Would highly recommend.

By Shawn on January 10, 2014


found this helpful.

NVX QBUS8 car subwoofer

For those who need a solid easy to install bass but not necessarily "Ground shaking" bass then this is the best I have heard. For people inside the car this should be more than enough bass to move them unless you want people outside the car vibrating also.

By Ray on September 19, 2013


found this helpful.

Toyota Tacoma

Fits under the seat of my Tacoma so it takes up no important space in the cab. Sounds great and adds more than enough bass to the small speakers in that truck. Install was easy as well.

By mtnparty on February 5, 2013


found this helpful.

On my second one

The first one only lasted 6 months. Sonic replaced it but it cost me shipping both ways, around 20 bucks. I"m 55 years old so I don"t think it was from using at max output all the time, it had to due with the mother board failure. I was hoping sonic would give me credit but they didn't. other then that sonic service was very good and they made me whole again.

Update from Sonic Electronix:
We have reached out to this customer and issued credit to make up for the inconvenience he had.

By Randy on September 21, 2013


found this helpful.

Got my money's worth and then some.

After looking at the Focal model which literally is exact same except for a plug for VW/BMW (I have a Ford Pickup), I felt compelled to give this one a shot. Thankfully I did because I have $300 in my pocket for something else and money isn't exactly flowing for me. Anyhow, back to the product. The bass is exactly what was missing from my system. It was simple to install. I have it vertically mounted behind the seat.
It runs for a few hours a day during my commute and I haven't had one hiccup. I am really happy with the product, the service at Sonic was excellent and my trek to work is much more enjoyable.

By Darren on September 20, 2012


found this helpful.

Small box ,Big sound

This QBUS8 is the easiest sub i have ever installed. Took me 25 minutes to install and 2 min to set.
I was surprised by how low and loud this can go,of course it's not a 12" sub but to fill in bass, you can't ask for better in such a small package.

Pros: - great sound
- excellent value ( considering it's an amp,box and sub)
- Compact ( fits under any seat)

Cons: - on low notes you can hear the air coming out.
- they should include carpet grips.

Still, great buy, might get one for the passenger seat.

By reddragon195 on September 17, 2013


found this helpful.


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