Rockville RockGhost V2 11″ Spare Tire Subwoofer

78%

22%

Bass Output Quality

Ease of Installation

Fitment Compatibility

Value for Money

Build Quality

Remote Control Usability

Stealth and Concealment

Low-End Frequency Extension

Amplifier Performance

Trunk Space Preservation

Tuning Flexibility

Wiring Kit Completeness

Long-Term Reliability

Overview

The Rockville RockGhost V2 11″ Spare Tire Subwoofer takes a genuinely clever approach to car audio — instead of commandeering your trunk with a bulky box, it mounts directly on top of your spare tire, sitting completely out of sight. The cast aluminum enclosure is built to fit 15″ through 17″ full-size spares, and because the amplifier is integrated, you skip the cost and wiring headache of a separate unit. This spare tire subwoofer lands in a comfortable mid-range price bracket, making it a realistic step up for anyone tired of factory bass but not ready to commit to a full custom audio build.

Features & Benefits

The 11″ driver pushes 200W RMS continuously — that's the number that actually matters in day-to-day listening, not the 800W peak figure you'll see in the headline. Real-world bass is punchy and reaches deep without audible breakup at normal listening levels. The plug-and-play wiring kit covers power, ground, RCA, and high-level inputs, so it works with factory head units as well as aftermarket decks. A 20-foot remote mounts on your dash and puts gain, bass boost, and crossover control at your fingertips while driving. The PWM MOSFET amplifier runs cooler and more efficiently than older designs, which matters when the unit is enclosed under a trunk mat.

Best For

This hidden sub is a natural fit for daily commuters who want a meaningful audio upgrade without turning their trunk into a project. If you spend your weekends hauling groceries or road-tripping, giving up cargo space for a traditional subwoofer box is a real sacrifice — the RockGhost V2 sidesteps that entirely by acting as an all-in-one solution. It's also worth noting for city dwellers: a subwoofer you can't see is less likely to attract a smash-and-grab. Before buying, confirm your spare tire size — compatibility runs from 15″ to 17″ full-size spares only; compact or donut spares won't work here.

User Feedback

Buyers who've installed this spare tire subwoofer generally come away impressed with how clean the setup process is — the included wiring is reported as genuinely adequate for most installs, not just a token bundle. Bass output draws consistent praise relative to what people paid, with many noting it outperforms similarly priced traditional setups. That said, vehicle-specific fit is worth researching before you buy: a handful of owners report needing minor adjustments in trucks or SUVs where the spare well geometry differs. The dash remote works reliably for most, though a few long-term users mention the knob feeling loose after extended use. Sound staging doesn't quite match a dedicated ported box, but that's an expected trade-off given the form factor.

#Component Subwoofers

#Subwoofers

#Car Audio

#Car Electronics

#Car & Vehicle Electronics

#Electronics

Pros

Built-in amplifier removes the need to budget separately for an external amp.
The spare tire subwoofer installs without cutting into trunk panels or making permanent modifications.
Included wiring kit is comprehensive enough for most installs right out of the box.
The 20-foot dash remote lets you tune bass and gain without pulling over.
Deep bass output consistently impresses buyers relative to what the unit costs.
Low-pass filter and phase switch give you real tuning control, not just a volume knob.
Cast aluminum build feels solid and handles the thermal demands of an enclosed space well.
Staying completely hidden in the trunk well is a practical theft deterrent for urban drivers.
Works with both RCA and high-level inputs, so factory head units are not a problem.
Full manufacturer warranty provides reasonable peace of mind for a mid-range electronics purchase.

Cons

Compatible only with 15″ to 17″ full-size spare tires — compact or donut spares are a dealbreaker.
Some owners in trucks and SUVs report needing extra hardware or adjustments to get a snug fit.
200W RMS is modest if you plan to run it alongside other aftermarket speakers at high volumes.
The dash remote knob has drawn complaints about looseness after months of regular use.
Sound staging and imaging do not match what a properly ported external enclosure can produce.
At 20 pounds, the unit adds noticeable weight directly over the spare, which some drivers prefer to avoid.
No wireless connectivity means the remote cable needs to be routed through the cabin carefully during install.
Bass boost and crossover settings reset if power is interrupted, requiring occasional re-tuning.

Ratings

The Rockville RockGhost V2 11″ Spare Tire Subwoofer scores below are generated by AI after analyzing thousands of verified global buyer reviews, with spam, bot-driven, and incentivized submissions actively filtered out. The results reflect a balanced picture of where this hidden sub genuinely delivers and where real owners have run into friction. Both the strengths and the recurring pain points are represented transparently so you can make a well-informed call before purchasing.

Bass Output Quality

81%

19%

For a self-contained spare tire unit, the depth and punch buyers get from the 11-inch driver regularly exceeds expectations. Daily commuters report feeling genuine low-end impact on bass-heavy tracks without the distortion or muddiness that plagues cheaper all-in-one subs at similar volumes.

At higher volumes, some listeners notice the bass loses a bit of tightness compared to a properly ported external enclosure. It's a trade-off most casual listeners accept, but buyers chasing precise, accurate bass reproduction tend to feel its limitations within a few months.

Ease of Installation

86%

The plug-and-play approach genuinely simplifies what can otherwise be an intimidating project. Owners with basic DIY experience consistently report completing the install in a couple of hours, with the included wiring kit covering the essentials for most vehicle configurations without a trip to the parts store.

Routing the power cable from the battery and threading the remote wire through the cabin still requires patience and some disassembly of trim panels. A small number of buyers in trucks and larger SUVs found the cable runs were just barely long enough, creating a tight situation.

Fitment Compatibility

67%

33%

For vehicles with a standard 15″ to 17″ full-size spare, the cylindrical enclosure drops into the spare well cleanly and sits snugly without requiring brackets or permanent modifications. Sedan and mid-size SUV owners tend to report the most satisfying fitment experiences.

Owners of trucks, compact crossovers, and vehicles with shallow or off-center spare wells report fitment challenges that range from minor adjustment work to outright incompatibility. The compatibility issue is the single most common reason for returns, making pre-purchase verification of your spare tire size non-negotiable.

Value for Money

83%

Buyers frequently note that the all-in-one pricing — subwoofer plus built-in amp plus wiring kit in one purchase — makes the total cost of ownership genuinely competitive. Getting deep bass without budgeting separately for an amplifier is a meaningful saving that resonates especially with first-time upgrade buyers.

A handful of enthusiasts feel the price point edges into territory where a traditional component sub and a separate entry-level amp could match or outperform the output. For pure audio-per-dollar performance, the convenience premium is real, even if most buyers consider it worthwhile.

Build Quality

78%

22%

The cast aluminum enclosure feels substantial and inspires more confidence than plastic-bodied competitors in the same price range. Most owners report zero rattles or vibrations from the enclosure itself after months of daily use, which speaks to how well the cylindrical design handles road vibration.

Some buyers noted that the finish on the enclosure showed minor scuffing during install, suggesting the surface coating is functional rather than premium. A few owners also flagged that certain fasteners and mounting components feel slightly undersized relative to the overall weight of the unit.

Remote Control Usability

71%

29%

Having a 20-foot wired remote that controls gain, bass boost, and crossover from the driver's seat is a genuinely useful feature that competitors at this price often omit entirely. Most buyers appreciate being able to dial the bass up for weekend drives and bring it back down for early-morning commutes.

The remote knob's build quality is the most consistently flagged long-term concern, with multiple owners noting the dial feels loose or develops inconsistent response after several months of regular use. It functions, but it doesn't feel as durable as the main enclosure would suggest.

Stealth and Concealment

88%

The hidden-in-the-trunk-well design works exactly as intended for the vast majority of buyers — casual observers opening the trunk see nothing unusual. Urban drivers in particular highlight this as a practical confidence boost, knowing their audio investment isn't advertising itself to anyone walking past.

While the concealment is effective in practice, owners should understand this is a convenience feature, not a security guarantee. Anyone specifically looking for aftermarket wiring under the trunk mat would identify the setup quickly, so it shouldn't replace other basic vehicle security habits.

Low-End Frequency Extension

74%

26%

The adjustable low-pass filter spanning 50Hz to 150Hz gives buyers real flexibility in blending the sub with different speaker setups. The 45Hz bass boost option adds welcome rumble for genres like hip-hop and EDM where sub-bass presence defines the listening experience.

Below 40Hz, output drops off more noticeably than a ported enclosure of similar driver size would allow, meaning the very lowest frequencies in film scores or electronic music lack the visceral weight some buyers hope for. This is a physical limitation of the sealed spare tire form factor.

Amplifier Performance

79%

21%

The PWM MOSFET design handles heat more efficiently than conventional Class A/B amplifiers, and buyers in warmer climates specifically mention that the unit stays cool even after extended driving sessions on summer days. Consistent clean power delivery at moderate volumes is a recurring positive in user feedback.

At sustained high-volume use, a small percentage of owners report the amplifier engaging its protection circuit, requiring a reset. This is more likely in vehicles where trunk airflow is particularly restricted, suggesting the thermal headroom has a real ceiling under demanding conditions.

Trunk Space Preservation

93%

This is where the RockGhost V2 concept delivers most convincingly — buyers who previously lived with a box sub in their trunk describe the recovered space as transformative for daily practicality. Grocery runs, road trips, and airport pickups all become noticeably more manageable.

The unit does add around 20 pounds directly on top of the spare tire, which some owners factor into their thinking for long trips where they want to keep the spare as accessible as possible. It is manageable, but the weight is something to be aware of.

Tuning Flexibility

76%

24%

Between the adjustable crossover, variable bass boost, and phase switch, buyers have enough controls to meaningfully adapt the sound to their specific vehicle cabin and speaker configuration. This level of adjustment is more than many all-in-one competitors offer and makes a noticeable difference in final sound quality.

The controls lack the precision of a standalone amplifier with a full parametric EQ, so buyers who have experience tuning audio systems professionally may find the adjustment range limiting. Settings also have a tendency to drift after power interruptions, which adds minor but recurring inconvenience.

Wiring Kit Completeness

72%

28%

The included kit covers the essentials — power cable, ground wire, RCA cable, and high-level input adapter — which is enough for a complete install in a typical vehicle without additional purchases. Buyers consistently mention that this reduces the overall cost and effort of getting the system running.

Cable lengths are calibrated for average-sized sedans and standard installs; owners of full-size trucks or those routing wires in non-standard configurations report that certain cables fall just short of reaching comfortably. An extended power cable in particular is a common supplementary purchase for larger vehicles.

Long-Term Reliability

69%

31%

The majority of buyers using the unit for daily commuting report no significant issues over the first year of ownership, with the enclosure and driver continuing to perform consistently. The cast aluminum housing holds up well against the humidity and temperature swings typical of trunk environments.

The remote control unit is the most frequently cited point of failure over extended ownership, with the knob mechanism drawing durability complaints after six or more months of use. A secondary concern is connector corrosion in vehicles with trunk moisture issues, though this is more vehicle-specific than a product flaw.

Suitable for:

The Rockville RockGhost V2 11″ Spare Tire Subwoofer was clearly designed with a specific buyer in mind: the everyday driver who wants a meaningful bass upgrade but can't stomach losing trunk space to a traditional subwoofer enclosure. It fits naturally into the life of a commuter, rideshare driver, or road-tripper who needs a clean, functional cargo area on a daily basis. Because the amplifier is built in and the wiring kit covers most common head unit setups, it's also a strong pick for someone who wants a straightforward Saturday install without pulling in a professional. City drivers who park on the street will quietly appreciate that the unit sits completely out of sight — there's nothing visible to tempt a break-in. Just confirm your vehicle has a 15″ to 17″ full-size spare tire before purchasing, as fitment is non-negotiable with this design.

Not suitable for:

The Rockville RockGhost V2 11″ Spare Tire Subwoofer is not the right call for serious audio enthusiasts chasing competition-level output or audiophile-grade sound staging. At 200W RMS, this hidden sub punches reasonably well for its category, but it won't satisfy someone who already runs a dedicated external amplifier and a ported enclosure tuned to their cabin. Vehicles equipped with compact or donut spare tires are flatly incompatible — the cylindrical form factor requires a standard full-size spare of the right diameter. If your trunk well is oddly shaped or your spare sits at an unusual angle, fitment could require extra effort or simply not work cleanly. Buyers who frequently swap their spare tire for road use should also think twice, since the install and uninstall process isn't designed to be a quick operation.

Specifications

Peak Power: The unit is rated at 800W peak power, which reflects maximum instantaneous output under ideal conditions.
RMS Power: Continuous RMS output is 200W, which is the more meaningful figure for real-world, sustained listening performance.
Driver Diameter: The subwoofer uses an 11-inch high-excursion dynamic driver designed to reproduce deep, low-frequency bass cleanly.
Enclosure Material: The cylindrical enclosure is constructed from cast aluminum, which manages heat dissipation and resists vibration-related resonance.
Dimensions: The unit measures 16.54″ in depth, 18.5″ in width, and 8.66″ in height, sized to fit standard spare tire wells.
Weight: The complete assembly weighs 20 pounds, which should be factored in when considering long-term placement over the spare tire.
Amplifier Type: An integrated PWM MOSFET amplifier provides efficient power delivery while running cooler than conventional amplifier designs.
Low-Pass Filter: The adjustable low-pass filter covers a range of 50Hz to 150Hz, allowing precise control over which frequencies the subwoofer reproduces.
Bass Boost: A variable bass boost of 0 to 12dB centered at 45Hz lets users add extra punch at the lowest frequencies without a separate equalizer.
Phase Switch: A switchable phase control offers 0° or 180° settings to help align the subwoofer's output with the vehicle's existing speakers.
Remote Control: A wired dash-mounted remote with a 20-foot cable allows real-time adjustment of gain, bass boost, and crossover from the driver's seat.
Connectivity: The unit accepts both RCA line-level inputs and high-level speaker inputs, making it compatible with factory and aftermarket head units.
Spare Tire Fit: Designed to mount over full-size spare tires in 15″, 16″, and 17″ diameters; compact or temporary spares are not compatible.
Power Source: The subwoofer draws power via a corded direct-wire connection to the vehicle's electrical system; no battery or wireless power option is available.
Audio Output Mode: Output is bass-boosted mono, which is standard and appropriate for subwoofer applications in a vehicle environment.
Waterproofing: The unit is not rated as waterproof and should be kept away from moisture; trunk environments with known water intrusion are not suitable.
Warranty: Rockville includes a full manufacturer warranty with the RockGhost V2, covering defects in materials and workmanship.

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FAQ

It depends on what spare tire your vehicle carries. The unit is built for full-size spare tires in 15″, 16″, and 17″ diameters. If your car uses a compact spare or a donut, this one won't work for you. When in doubt, pull up your owner's manual or physically measure the spare before ordering.

No — the amplifier is built directly into the enclosure. That's actually one of the more practical aspects of this design; you wire it in, connect the remote, and you're done. No rack-mounting a separate amp or running additional power cables for it.

For most standard installs, the included kit covers what you need: power, ground, RCA, and high-level inputs. A few buyers with longer cable runs or vehicles with unusual layouts have supplemented it, but the majority report completing the install using only what's in the box.

Most owners describe it as a manageable weekend project rather than a technical challenge. Routing the power cable and the remote control wire takes the most time. If you've ever installed a car stereo yourself, this is in a similar ballpark. If you haven't, a basic wiring guide and a couple of hours is usually enough.

It works with factory head units. The high-level input option lets you tap directly into the speaker wires coming from your head unit, which is exactly the connection type OEM systems use. RCA input is there for aftermarket decks that already have a subwoofer preout.

The phase switch changes the timing of the subwoofer's output relative to your other speakers. In some vehicles, the sub can sound a little hollow or disconnected; flipping between 0° and 180° and listening for which setting sounds fuller and more integrated usually takes about two minutes and makes a real difference.

A well-tuned ported box will generally produce tighter, more accurate bass at higher output levels. This hidden sub trades some of that potential for the convenience of the spare tire form factor. For casual listening and daily driving, most people find the output more than satisfying; dedicated audio enthusiasts chasing precision may eventually want more.

If you're driving on the spare in an emergency, you'd remove the subwoofer first — it's not designed to stay mounted while the spare is in active use. The install process involves securing it in place, so it's not something you swap in and out casually, but removing it when needed is possible.

Some owners have noted that the gain and crossover settings can reset after a power interruption, meaning you'd need to re-tune via the dash remote after reconnecting the battery. It's a minor inconvenience rather than a serious flaw, but worth knowing before you spend time dialing in the perfect settings.

The PWM MOSFET amplifier design runs more efficiently and generates less heat than older amp topologies, and the cast aluminum enclosure helps conduct heat away from the internal components. As long as airflow in your trunk isn't completely sealed off and you're not running the system at maximum volume for extended periods, overheating is not a common complaint among owners.

Where to Buy

Walmart

Rockville RockGhost V2 11″ Spare Tire Subwoofer

In stock $164.95

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eBay

Rockville RockGhost V2 11″ Spare Tire Subwoofer

In stock $164.95

Buy Now

Rockville Audio

Rockville RockGhost V2 11″ Spare Tire Subwoofer

In stock $164.95

Buy Now

Rockville RockGhost V2 11″ Spare Tire Subwoofer

Overview

Features & Benefits

Best For

User Feedback

Pros

Cons

Ratings

Bass Output Quality

Ease of Installation

Fitment Compatibility

Value for Money

Build Quality

Remote Control Usability

Stealth and Concealment

Low-End Frequency Extension

Amplifier Performance

Trunk Space Preservation

Tuning Flexibility

Wiring Kit Completeness

Long-Term Reliability

Suitable for:

Not suitable for:

Specifications

Related Reviews

FAQ

Will this fit my car's spare tire well?

Do I need to buy a separate amplifier?

Is the included wiring kit actually good enough, or should I buy extra cables?

How difficult is the installation for someone who isn't an audio professional?

Can I use this with my factory head unit, or do I need an aftermarket stereo?

What does the phase switch actually do, and do I need to adjust it?

How does the Rockville RockGhost V2 11″ Spare Tire Subwoofer compare to a traditional box subwoofer in terms of sound quality?

Does it make noise or rattle when I'm actually using my spare tire during a flat?

What happens to the settings if my car battery dies or gets disconnected?

Is there any risk of the unit overheating inside the trunk?

Where to Buy