Monoprice Premium Select 8-Inch Subwoofer

76%

24%

Value for Money

Ease of Setup

Bass Performance

Input Versatility

Build Quality

Auto On/Off Reliability

Low-Pass Filter Control

Phase Control

Placement Flexibility

Volume Control Precision

Long-Term Durability

Cable & Connectivity Quality

Room Size Suitability

Noise Floor & Idle Behavior

Overview

The Monoprice Premium Select 8-Inch Subwoofer is a compact, honest-value addition to any small or medium home theater — the kind of sub that Monoprice has quietly built a reputation on since its debut in 2016. This Monoprice subwoofer isn't trying to compete with high-end units costing two or three times as much; it knows its lane and stays in it. The 8-inch driver fits comfortably in apartments, living rooms, and desktop setups without eating up floor space. If you need deep, room-shaking bass, look elsewhere. But if you want a reliable low-end boost for everyday use, this is a surprisingly capable starting point.

Features & Benefits

The 8-inch Monoprice sub runs at 100 watts RMS with a 200-watt peak, driven by a paper cone with a rubber surround that should hold up over years of regular use. What really stands out, though, is the three input options — dedicated LFE, line-level stereo, and speaker-level stereo — meaning it plugs cleanly into almost any AV receiver, TV, or stereo amplifier without adapter headaches. The adjustable low-pass filter lets you match the crossover point to your existing speakers, and the phase control helps tighten the bass so it doesn't sound detached from the rest of your audio. The auto on/off works reliably and keeps things hassle-free day to day.

Best For

This compact subwoofer is really built for people taking their first real step into surround sound — someone putting together a 5.1 system on a reasonable budget, or a renter who wants better bass from their TV without rattling the neighbors' walls. It suits small-to-medium rooms well; anything much larger and you'll likely feel the limits of an 8-inch driver. Desktop listeners and people who mostly watch movies or stream TV shows will get solid results. It's also worth considering if you leave gear running constantly — the auto on/off means you don't have to babysit it. Where it's less ideal is dedicated music listening rooms where low-frequency extension really matters.

User Feedback

Most buyers come away happy with what this Monoprice subwoofer delivers at the price — the most common praise is that setup takes minutes and the bass impact on action movies and TV is immediately noticeable. The auto on/off gets called out often as a feature that actually works, which isn't always a given at this price point. On the critical side, some users note that the plastic cabinet feels less substantial than they'd hoped, and those chasing very low frequencies — think organ music or cinema-level rumble — may find the 8-inch driver runs out of headroom. A handful of buyers mention the volume control needs careful calibration to avoid muddiness. Overall, realistic expectations lead to satisfied buyers.

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Pros

Three input types — LFE, line-level, and speaker-level — make it compatible with almost any existing audio setup.
The auto on/off works reliably in daily use, saving energy without any manual effort.
Adjustable low-pass filter and phase control let you fine-tune the sound to match your existing speakers.
The compact footprint fits under TV stands and on bookshelves without dominating the room.
Setup is genuinely straightforward — most buyers report getting audio within minutes of unboxing.
Bass impact on movies and TV shows is noticeably improved over a system running satellites alone.
The rubber-surround paper cone driver is a durable, time-tested design that holds up well over years of use.
At this price tier, the feature set — including phase control and multiple inputs — is unusually complete.

Cons

Deep sub-bass extension is limited; frequencies below 35Hz start to roll off noticeably.
The plastic cabinet resonates at higher volume levels, which can introduce unwanted coloration to the sound.
Not powerful enough to fill large or open-plan rooms with satisfying bass.
The volume knob can be finicky — small adjustments sometimes push the output from too quiet to too boomy.
No remote control or app-based tuning means adjustments require physical access to the unit.
Build quality feels adequate rather than solid; the cabinet does not inspire confidence during handling.
The 8-inch Monoprice sub can struggle to keep pace with loud, dynamic content at higher listening levels.
Speaker grille attachment feels flimsy and is easy to knock loose during routine use.

Ratings

The scores below reflect an AI-powered analysis of verified global user reviews for the Monoprice Premium Select 8-Inch Subwoofer, with spam, bot-generated feedback, and incentivized reviews actively filtered out to ensure accuracy. Ratings cover the full picture — where this compact sub genuinely delivers and where real buyers have run into frustration. Both strengths and honest shortcomings are weighted equally in every category.

Value for Money

91%

This is consistently the category where the 8-inch Monoprice sub earns its most enthusiastic praise. Buyers repeatedly note that the bass improvement over a bare satellite system feels disproportionately large relative to what they paid, especially when used with a budget 5.1 AV receiver and entry-level bookshelf speakers.

A small subset of buyers who compared it side-by-side against competing units in the same price bracket felt the output and cabinet quality were only marginally ahead, narrowing the value gap slightly more than expected.

Ease of Setup

88%

Most users report getting audio out of this compact subwoofer within ten minutes of opening the box. The three clearly labeled input options remove guesswork, and the RCA connections are sturdy enough that cables seat without fiddling.

A handful of buyers using older stereo amplifiers without a dedicated subwoofer output found the speaker-level input instructions unclear, and had to rely on third-party guides rather than the included documentation to get things working.

Bass Performance

76%

24%

For movie nights and streaming, the low-end addition is immediately noticeable — dialogue stays clear while explosions and soundtracks gain real weight. In a medium-sized living room, the output is more than adequate for casual home theater use.

Users who push for deep sub-bass — organ passages, electronic music below 35Hz, or high-volume action film soundtracks in larger rooms — find the 8-inch driver runs out of authority. Bass definition also softens noticeably at higher volume levels.

Input Versatility

89%

Having LFE, line-level stereo, and speaker-level inputs on a sub at this price tier is genuinely useful. Buyers coming from different receiver generations or TV setups consistently mention this flexibility as the feature that tipped their decision.

The absence of any wireless or optical input means buyers with modern TVs that have dropped analog outputs need an additional converter, which adds cost and an extra box to manage.

Build Quality

62%

38%

The cabinet feels solid enough for everyday stationary use, and the rubber-surround driver is a durable construction choice that outlasts foam surrounds common in older budget subs. Buyers who place it and leave it alone rarely report any structural complaints.

Picking it up or moving it reveals the plastic enclosure's limitations — panels flex slightly under pressure and the overall feel does not match units from more premium brands. The speaker grille attachment in particular draws criticism for feeling flimsy and prone to loosening.

Auto On/Off Reliability

83%

Unlike similar features on competing budget subwoofers, the auto power circuit on this Monoprice subwoofer is widely praised for working as advertised. Buyers who run long TV sessions report it waking and sleeping consistently without false triggers.

At low listening volumes — late-night TV or background music — the auto-on trigger can be slow to respond, occasionally leaving a brief gap in bass at the start of playback that some users find mildly annoying.

Low-Pass Filter Control

78%

22%

The adjustable crossover gives users genuine control over how the subwoofer blends with their main speakers, a feature that makes a real audible difference when dialing in a 5.1 system from scratch. Buyers with smaller satellite speakers especially appreciate being able to push the cutoff higher.

The physical dial lacks detents or clear frequency markings, making it difficult to return to a previously calibrated setting after accidental adjustment. Users who share the system with family members report the knob getting bumped without anyone noticing.

Phase Control

74%

26%

Having onboard phase adjustment prevents the hollow, disconnected bass that plagues poorly integrated subwoofers. Buyers who took ten minutes to experiment with the control report a noticeably tighter, more cohesive sound across their full speaker system.

The control is a simple 0/180 toggle rather than a continuously variable dial, limiting fine-tuning options. In rooms with awkward acoustics, users noted the two fixed positions were not always enough to fully resolve bass cancellation issues.

Placement Flexibility

84%

At under 11 inches wide and 13 inches deep, this compact subwoofer fits in spaces that would reject a 10-inch or 12-inch unit outright. Apartment dwellers and buyers with furniture-constrained rooms consistently highlight this as a deciding factor.

The rectangular enclosure and front-firing driver mean placement directly against a rear wall can cause some bass boominess, requiring a few inches of clearance that not all buyers anticipate when planning their setup.

Volume Control Precision

66%

34%

The volume knob covers a wide output range and is sensitive enough to allow real differences between settings, which buyers appreciate when matching the sub to different speaker sensitivities or room sizes.

Several users report the usable range sits within a narrow band on the dial — too little rotation and there is barely any bass; slightly too much and it overwhelms the satellites. Finding the sweet spot takes patience, and the unmarked knob makes it hard to reproduce.

Long-Term Durability

71%

29%

The rubber-surround driver is a reliability asset, and buyers who have owned this unit for two or more years report no degradation in sound quality or functionality. The internal amplifier has not shown widespread failure patterns in long-term ownership feedback.

The plastic cabinet is the main long-term concern — cosmetic scuffs and minor panel separation appear in reviews from buyers who move the unit regularly. It is built to stay in one place, and durability drops noticeably if treated like portable gear.

Cable & Connectivity Quality

69%

31%

The RCA jacks on the rear panel are firm and grip cables securely, which reduces the chance of intermittent connection issues during normal use. Buyers connecting via the LFE input report clean, hum-free signal in most standard home setups.

No cables are included in the box, which surprises some buyers who expect at least a basic RCA cable. Ground loop hum is also a recurring issue in setups where the subwoofer and source components share different power circuits.

Room Size Suitability

67%

33%

In rooms up to roughly 200 to 250 square feet, the output of this Monoprice subwoofer is genuinely convincing for movies and TV. Buyers in studios, small living rooms, and bedrooms consistently report satisfying results without needing to push the volume dial far.

Buyers in larger spaces, open-plan layouts, or rooms with high ceilings find the sub runs out of acoustic authority fairly quickly. At higher volume settings in bigger rooms, bass becomes less defined and the driver audibly strains.

Noise Floor & Idle Behavior

72%

28%

When properly grounded and paired with a decent RCA cable, the unit is quiet at idle — no hiss, static, or persistent hum was reported by the majority of buyers in standard home theater configurations.

A meaningful minority of users encountered ground loop hum, particularly in older homes with mixed electrical grounding or when the subwoofer was connected to a TV and a separate amplifier simultaneously. Resolving it requires an additional isolator accessory.

Suitable for:

The Monoprice Premium Select 8-Inch Subwoofer is a strong match for budget-conscious buyers who want a meaningful bass upgrade without overcommitting financially. It fits naturally into small and medium-sized living rooms, bedrooms, and apartment setups where a larger sub would be physically impractical or acoustically overkill. People assembling their first 5.1 home theater system will find it slots in cleanly alongside an entry-level AV receiver, and the three available input types mean compatibility is rarely an issue. Renters who need controlled, room-filling bass without disturbing neighbors will appreciate the ability to dial things in precisely using the low-pass filter and phase control. It also works well as a desktop companion for nearfield listeners who just want some warmth and weight added to music or streaming audio.

Not suitable for:

Buyers chasing deep, physical sub-bass — the kind you feel in your chest during an action film or concert recording — will likely find the Monoprice Premium Select 8-Inch Subwoofer falls short of expectations. An 8-inch driver has real physical limits, and in larger rooms it can start to feel underpowered even at higher volume settings. Dedicated audiophiles or home theater enthusiasts who prioritize cabinet rigidity and premium construction will notice the plastic enclosure and may find it unsatisfying compared to purpose-built options at a higher price point. It is also not the right choice for people who want to fill a large open-plan space with bass, or for those building a serious two-channel music system where low-frequency accuracy and extension are critical.

Specifications

Driver Size: The subwoofer uses an 8-inch dynamic audio driver with a paper cone and rubber surround for long-term durability.
RMS Power: Continuous (RMS) power output is rated at 100 watts, reflecting real-world sustained listening capability.
Peak Power: Peak power output reaches 200 watts, handling short dynamic bursts in action scenes or bass-heavy music.
Impedance: Nominal impedance is 8 ohms, making it broadly compatible with standard home theater amplifiers and AV receivers.
Input Options: Three inputs are provided: a dedicated LFE (Low Frequency Effects) jack, line-level stereo RCA, and speaker-level stereo connections.
Low-Pass Filter: An adjustable low-pass filter allows users to set the crossover frequency so the subwoofer blends naturally with satellite or bookshelf speakers.
Phase Control: An onboard phase control switch helps align the subwoofer's output with the main speakers to avoid bass cancellation or lag.
Auto On/Off: The unit includes an automatic power detection circuit that turns the subwoofer on when a signal is present and off after a period of silence.
Dimensions: The enclosure measures 12.8″ deep, 10.6″ wide, and 15″ tall, offering a relatively compact footprint for a powered subwoofer.
Weight: The unit weighs 18.5 pounds, which is manageable for a single person to position and reposition as needed.
Cabinet Material: The enclosure is constructed from a combination of plastic and metal components, consistent with the unit's entry-level price positioning.
Connectivity: All audio connections use standard wired RCA jacks; no wireless or Bluetooth input is supported.
Surround Config: The subwoofer is designed to integrate with 5.1 surround sound configurations as the dedicated LFE channel speaker.
Color: Available in a single finish — black — which suits most home theater and entertainment furniture aesthetics.
Power Source: The unit is powered via a standard corded AC electric connection and does not support battery operation.
Driver Surround: The rubber surround on the 8-inch driver resists degradation over time better than foam surrounds common in older subwoofer designs.
Manufacturer: Built by Monoprice Inc., a US-based brand recognized for delivering functional consumer electronics and audio gear at accessible price points.
Model Number: The official Monoprice model number for this unit is 114567, which can be used to verify compatibility or contact support.
Warranty: Monoprice provides a limited warranty on this product; buyers should confirm current warranty terms directly with Monoprice at time of purchase.
Release Date: This subwoofer was first made available in January 2016 and remains an active, non-discontinued product in Monoprice's lineup.

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FAQ

Yes, as long as your TV has RCA line-level outputs (sometimes labeled Audio Out), you can connect the 8-inch Monoprice sub using a standard RCA cable. Many modern TVs have phased out these ports, so check your TV's rear panel first. If your TV only has an optical or HDMI ARC output, you would need a small DAC or audio converter in between.

The low-pass filter determines which frequencies the subwoofer handles — it cuts off sound above a set point so only bass frequencies come through. A good starting point is around 80Hz, which is the standard crossover used in most home theater systems. If your main speakers are smaller satellite types, you might push it a bit higher; if they are larger bookshelf or floor-standing speakers, try a lower setting and adjust by ear.

It works perfectly in a 2.1 stereo setup. The line-level stereo RCA inputs are there precisely for this use case — connect it to a stereo amplifier or receiver's subwoofer output and you are good to go. You do not need a surround sound system to get value from this compact subwoofer.

The auto on/off circuit activates when it detects an incoming audio signal, so a quiet TV show or low-volume music may not always wake it immediately. There is no dedicated manual override switch; the unit is designed to operate in auto mode. If this is a concern, some buyers simply leave the subwoofer powered via a smart plug they control manually.

Realistically, it is best suited for rooms under 250 to 300 square feet. In larger open-plan spaces, 100 watts RMS from an 8-inch driver starts to feel thin, especially for movies with demanding low-frequency soundtracks. If your room is bigger, you would likely want to look at a 10-inch or 12-inch subwoofer with more headroom.

A single RCA cable (sometimes called a subwoofer cable) running from your receiver's subwoofer or LFE output to the LFE input on this sub is all you need. Length matters somewhat — thicker, shielded cables are worth using for runs over 15 feet to avoid hum or interference.

Ground loop hum is a common issue with powered subwoofers in general, and this unit is not immune. If you hear a hum at low volumes, try plugging the subwoofer and your receiver or TV into the same power strip, or use an inexpensive ground loop isolator on the RCA connection. Most users do not experience this, but it is worth knowing how to address it if it comes up.

Technically you can, but it is not recommended. Subwoofers need some space around them for airflow and to let the sound pressurize the room properly. Enclosing it too tightly can cause the unit to run warm over time and may reduce bass output. If cabinet placement is unavoidable, leave at least a few inches of clearance on all sides and ensure the front is unobstructed.

Phase control shifts the timing of the subwoofer's output relative to your main speakers. If bass sounds hollow or disconnected even after adjusting the volume and crossover, try switching the phase setting — most units offer 0 and 180 degrees. You may also have a continuously variable dial. Set it wherever the bass sounds fullest and most integrated with the rest of the audio.

It handles music reasonably well for casual listening — genres like hip-hop, electronic, and pop benefit noticeably from the added low end. That said, it is not tuned for audiophile-grade music reproduction, and very deep bass notes in classical or jazz recordings can feel somewhat rounded off rather than precisely defined. For movies and general TV use it really does punch above its weight class.