NVX QBSTA Subwoofer
- Subwoofer
- 11 inches
- 300 watts
- NVX
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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How it ranks among the 74 subwoofers we track
4.4★ across 53 Amazon ratings, Bayesian-smoothed toward the category average.
53 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 74 subwoofers we track - how the scorecard works · full subwoofers data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
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.
Strengths and trade-offs
Drawn from this product's published specifications.
- 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 | |
| Driver Size | 11 inches |
| Weight | 10.52 pounds |
| Dimensions | 4.7 × 14.2 × 4.7 inches |
| Power & efficiency | |
| Power | 300 watts |
| Construction & materials | |
| Color | Black |
| Compatibility & installation | |
| Connectivity | RCA |
| Mounting | Spare Tire Mount |
| Other details | |
| Brand Tech | NVX |
| Speaker Type | Subwoofer |
How it compares
This product against the closest alternatives we track in subwoofers.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| NVX QBSTA SubwooferThis product | 4.4 / 5 | 53 | 3.5 / 5 |
| Klipsch R-12SW SubwooferKlipsch | 4.8 / 5 | 5,723 | 4.1 / 5 |
| Sonos SUBG3US1BLK SubwooferSonos | 4.7 / 5 | 1,900 | 3.9 / 5 |
| Audioengine S8 SubwooferAudioengine | 4.7 / 5 | 758 | 3.9 / 5 |
| Edifier T5 SubwooferEdifier | 4.4 / 5 | 1,800 | 3.8 / 5 |
Similar subwoofers from other brands
Questions about the NVX subwoofers
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
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.