QBSTA 11ft Spare Tire Powered Subwoofer - Space-Saving Bass

In this review the NVX QBSTA 11' Spare Tire Powered Subwoofer is evaluated for drivers who want a compact bass upgrade without losing cargo space. The bottom line: it delivers surprisingly deep, punchy low end for its size and installs in minutes for vehicles with removable spare tire posts, making it a sensible choice for anyone seeking a tidy, powerful bass solution that preserves trunk or cargo area usability.

Key Features

• Powered Output: The built-in amplifier provides 300 watts RMS and 900 watts peak power to produce robust, room-filling bass that noticeably improves music genres that rely on low frequencies.
• Space-Saving Design: The subwoofer mounts to the hub of a spare tire so it uses otherwise unused space and keeps the cargo area clear for luggage or gear.
• Compatibility: Designed for spare tires with removable posts, the unit fits a wide range of cars and SUVs so it can be added without custom enclosures.
• Precision Controls: Top-mount controls include a variable low-pass filter, bass boost, subsonic filter and phase shift so users can dial in tight, musical bass for different vehicles and music styles.
• Easy Operation: Signal sensing for automatic turn-on and an included wired remote bass level control simplify installation and day-to-day use.
• Durable Construction: A heavy-duty die-cast aluminum enclosure protects the amplifier and driver for long-term reliability in the vehicle environment.

Who It's For

The NVX QBSTA is ideal for drivers who want a meaningful low-frequency upgrade but cannot sacrifice space or want to avoid a traditional trunk-mounted box. It suits commuters, road-trippers and weekend drivers who value an integrated, out-of-sight solution and those who prefer straightforward install and tuning over custom fabrication.

It is not the best choice for owners of vehicles without removable spare posts or for audiophiles who want extremely high output at very low frequencies from large enclosures; those users should consider a full-size subwoofer box and dedicated amp instead.

Pros & Cons

Pros

• Provides solid sound quality with good mid-bass punch for its size.
• Mounts under the spare tire to free up trunk space and maintain a factory look.
• Easy to install with signal-sensing turn-on and a wired remote for quick gains.
• Durable die-cast aluminum housing that stands up to vehicle conditions.

Cons

• Requires a removable spare tire post, so fitment is not universal for all vehicles.
• One reported issue customers mention is a blown fuse in rare cases, indicating electrical precautions during install are needed.

Specifications

Driver Size	11' spare tire mount
RMS Power	300 watts
Peak Power	900 watts
Low-Pass Filter	Variable 50-180 Hz
Bass Boost	0-12 dB at 50 Hz
Subsonic Filter	10-50 Hz
Controls	Top-mount amp controls and wired remote

Our Verdict

The QBSTA 11' Spare Tire Powered Subwoofer is a practical, value-oriented upgrade for drivers who need powerful bass without losing cargo space. With 300 watts RMS, precise on-unit controls and a compact spare-tire mounting approach, it delivers strong bass performance and straightforward installation, making it a smart buy for most vehicle owners who meet the fitment requirement.

Frequently Asked Questions

Will this fit any spare tire?
The unit fits vehicles with spare tires mounted on removable posts; it will not fit vehicles without that mounting arrangement.

Is a remote bass control included?
Yes, a wired remote bass level control is included for convenient adjustment from the cabin.

Does it turn on automatically with the radio?
The subwoofer has signal sensing for automatic turn-on, so a dedicated remote turn-on wire is not required in many installations.