NVX QBSTA Spare Tire Powered Subwoofer 11 Inch
- Subwoofer Diameter: 11 inches
- Audio Driver Size: 11 inches
- Woofer Diameter: 11 inches
- Speaker Size: 11 inches
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Despite its home theater category label, the QBSTA is a spare tire mount car audio subwoofer built for vehicle installs that need to save cargo space.
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ASIN: B0CJYM14P4Category: Subwoofers
Overview
The NVX QBSTA is a 300 watt, 11 inch subwoofer built into a spare tire mount enclosure, connected via RCA, despite being filed under TV and home theater. Its compact 4.72 by 14.17 by 4.72 inch build and 10.52 pound weight point to a vehicle audio installation rather than a living-room subwoofer.
The spare tire mounting design and RCA input are hallmarks of car audio subwoofers built to fit inside a truck or SUV's spare tire well, saving cargo space compared to a standard box enclosure. That places this product in vehicle audio rather than the home theater grouping it is listed under here, and buyers shopping for a living-room subwoofer should look elsewhere.
- 11 inch subwoofer driver
- 300W power rating
- Spare tire mount enclosure
- RCA connectivity
Who it's for
Suited to vehicle owners installing a car audio subwoofer who want to preserve trunk or cargo space by mounting it inside a spare tire well. Not a fit for a home theater or TV sound setup, which is what its category label might suggest.
Pros and cons
- Fits inside a spare tire well
- 300W, 11 inch driver
- RCA input for car audio systems
- Not suited to home or living-room use
- Compact enclosure trades size for output
Performance notes
The 11 inch driver and 300 watt rating are typical of a compact car audio subwoofer, connected through RCA inputs from a vehicle's head unit or amplifier. The spare tire mount enclosure is designed to slot into the wheel well of a truck or SUV, trading some low-end output for space savings compared to a full-size box.
Specifications
| Brand | NVX |
|---|---|
| Dimensions & fit | |
| Subwoofer Diameter | 11 incheshigher than 59% of 28 subwoofers |
| Audio Driver Size | 11 incheshigher than 68% of 32 subwoofers |
| Woofer Diameter | 11 incheshigher than 70% of 28 subwoofers |
| Speaker Size | 11 incheshigher than 55% of 23 subwoofers |
| Weight | 23.19 poundslower than 60% of 56 subwoofers |
| Item Dimensions D X W X H | 4.7 × 14.2 × 4.7 inches |
| Tweeter Diameter | 1 inch |
| Capacity & performance | |
| Speaker Maximum Output Power | 300 wattslower than 54% of 38 subwoofers |
| Audio Output Mode | Mono |
| Age Range Description | Adult |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Enclosure Material | Aluminum |
| Color | Black |
| Compatibility & installation | |
| Connectivity Technology | RCA |
| Connectivity Protocol | RCA |
| Subwoofer Connectivity Technology | Wired |
| Mounting Type | Spare Tire Mount |
| Compatible With Vehicle Type | Car |
| Compatible Devices | Car Audio System |
| Included components | |
| Customer Package Type | Flat Free Package (FFP) |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Type | Limited |
| Warranty Description | 1 year |
| Other details | |
| Speaker Type | Subwoofer |
| Control Type | Remote |
| Audio Driver Type | Dynamic Driver |
| Number Of Audio Channels | 2.1 |
| Is Waterproof | No |
| Number Of Items | 1 |
| Mp3 Player | No |
| Additional Features | Bass Boost, Spare Tire Amplified Subwoofer |
| Antenna Location | Car |
| Builtin Media | 8 Gauge Power Wire, Ground Wire, Wired Remote Bass Level Control |
| Specific Uses For Product | Car Audio Enhancement For Vehicles With Spare Tires Inside The Trunk |
| Frequency Response | 50 Hz |
| Wireless Technology | No Wireless Communication Technology |
Closest rivals on specs
Klipsch R-100SW Subwoofer with R-52C Center Speaker- Subwoofer Diameter 11 vs 10 inches (+10%)
- Audio Driver Size 11 vs 10 inches (+10%)
Klipsch R-120SW Subwoofer- Weight 23.19 vs 31 pounds (-25%)
- Speaker Maximum Output Power 300 vs 400 watts (-25%)
Frequently asked questions
Is the NVX QBSTA a home theater subwoofer?
No, its spare tire mount design and RCA input identify it as a car audio subwoofer despite the category listing.
What size driver does it use?
An 11 inch driver.
How does it connect to an audio system?
Through an RCA connection.