Not sure which subwoofer to buy? Subwoofers are the easiest speaker category to shop well, because the performance that matters is measurable and published. This guide covers the four decisions that determine what you end up with: how many, sealed or ported, how big, and how much.
Every subwoofer on this site is ranked by CEA-2010-A, a standardized burst test measuring how loud a sub plays each bass frequency before distortion becomes audible. Manufacturer frequency-response claims are close to meaningless by comparison: “down to 20 Hz” tells you nothing about how loud 20 Hz plays before the driver runs out of travel.
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Step 1: Decide How Many, Before You Decide Which
This is the decision people skip and the one with the largest effect on what you actually hear.
A single subwoofer in a room produces a response full of peaks and nulls caused by room modes. Those are positional: a seat that sits in a null hears almost no bass at that frequency, and no amount of EQ fixes it, because you cannot boost energy that isn’t arriving. Two subwoofers in different positions average those modes out, flattening response across every seat rather than optimizing one.
The practical rule: if you’re choosing between one $1,500 subwoofer and two $750 subwoofers, take the pair. The exception is a very small room with one listening position, where a single well-placed sub is fine.
Step 2: Sealed Or Ported
This is the real fork in the road, and both answers are correct for different people.
Sealed rolls off gently at 12 dB per octave. That slope is roughly the mirror image of the bass gain a small or medium room already provides, so sealed subs often measure flatter in-room with no correction. They’re smaller, they stop when the signal stops, and they suit music. See best sealed subwoofers.
Ported uses a tuned port so the driver barely moves near tuning, buying 3-6 dB more output in the 20-40 Hz band from the same driver and amplifier. That’s the band movie effects live in. The costs are a larger cabinet, a steep 24 dB per octave cliff below tuning, and stored energy at tuning that shows up as group delay. See best ported subwoofers.
The short version: mostly movies, get ported. Mostly music or a small room, get sealed. Many subs let you plug the port and run either way, which is the best of both.
Step 3: Size It To The Room, Not To The Spec Sheet
Small rooms do a lot of the work for you. Below the frequency where the room’s longest dimension stops supporting a full wave, a sealed room reinforces bass at roughly 12 dB per octave. In a bedroom that transition happens high enough that a modest sub can measure flat to 20 Hz in-room while barely reaching 30 Hz on its own.
The corollary is that buying a huge subwoofer for a small room mostly buys distortion headroom you’ll never use, and creates a placement problem. See best subwoofers for small rooms and apartments.
Large rooms work the other way: room gain arrives lower and weaker, so you need real output, and this is where doubling up pays off most.
Step 4: Set The Budget
Subwoofers are the best value in audio, because there’s no tweeter, no crossover and no cabinet finish to pay for. A $375 sub that measures well genuinely outperforms a $1,200 one that doesn’t, and several budget picks here out-measure subs at three times the price. Start at best budget subwoofers under $500.
Spend the money in this order: enough output for the room → a second subwoofer → better control and app features → cabinet finish. Most people invert that list and buy one pretty sub with a nice app.
The Picks, In Short
The best budget subwoofer, and the one most people should buy two of, is the Monoprice SW-15
A big 15 inch subwoofer with powerful, punchy bass at a budget price, great for movies in a large room.
The best all-round subwoofer for a typical living room, sealed, with app control and room correction, is the SVS SB-3000
A well made sealed subwoofer with tight, accurate bass and handy app controls, great for music and medium rooms.
The best home theater subwoofer under $1000, remarkable for how deep it plays at the price, is the Monoprice Monolith M-10 V2
A THX certified 10 inch ported subwoofer with a heavy cabinet, balanced inputs and two EQ modes.
The most deep bass per dollar for a large room among current subwoofers, and an easy sub to double up on, is the XTZ Sound SUB 3X12
A triple 12 inch subwoofer with huge, deep output for movies in a large room, for less than most rivals.
The best compact subwoofer for a small room or apartment is the SVS SB-1000 PRO
A compact sealed subwoofer with tight bass and huge output for its weight, best for music and small rooms.
Mistakes That Cost People Money
Buying one big sub instead of two smaller ones. Covered above, and it’s the most common expensive mistake in the category.
Trusting the frequency response spec. “20 Hz - 200 Hz” with no tolerance or output level attached is marketing, not a measurement. Use the CEA-2010-A figures in each spec table.
Ignoring placement. Moving a sub two feet changes its in-room response more than most upgrades do. Crawl the room, or at minimum try the corner and the front wall before deciding what you own.
Setting the crossover by ear at 80 Hz and walking away. Level, crossover point and phase all interact. Getting these right is free and matters more than the last 3 dB of output.
Paying for finish over output. Very small “lifestyle” subs measure well below conventional subs at the same price. Buy one because the size is a hard requirement, not because it’s better.
Where To Go Next
Full rankings with specs and measurements, powered and passive together: small, medium and large. For every enclosure type in the data, including passive radiator and horn-loaded designs, see subwoofer enclosure types explained.
By use case: home theater, music, sealed, ported, small rooms, under $500, under $1,000, under $2,000. Placement will make or break the result, see how room acoustics affects speakers.
Shopping during a sale? The Black Friday speaker deals page shows which top rated speakers are actually below their usual price, judged against each speaker’s own price history rather than a list price.