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Home theatre subwoofers buying guide

How to choose the best one for your surround sound system

In this article: tips on choosing the right powered subwoofer for your home theater. What size should you get? Does sealed or ported matter? Where should your sub go? We'll cover all of these questions and more to help you get the best bass possible.

I discovered my passion for hard-hitting bass as a movie- and music-loving teenager back in the ‘90s. My friends and I spent countless hours talking shop and tweaking our systems. A couple of decades later, my thrill for great bass hasn’t waned one bit. I still get goosebumps when a surge of low-frequency punch sweeps through my living room.

Having the right powered subwoofer makes a real difference in the quality of your home theater experience. I've put this guide together to help you choose the best one for your system. We'll look at the key factors to consider while shopping, as well as which features and specs really matter.

How do you choose the right size subwoofer?

One of the first things to consider is what size sub you want. Generally speaking, the larger the surface area of the woofer, the deeper it will play — that's indicated by the sub's frequency response, which is measured in Hz.

It may be tempting to go for the largest sub you can find. But bigger is not always better. It's important that your sub blends in seamlessly with your other speakers to create an immersive listening experience.

If your system consists of compact satellite or bookshelf speakers, an 8" or 10" sub will pair nicely with them. On the other hand, if you have big floor-standing speakers and a huge center channel, a 12" sub is a better sonic match.

Do you have a big, open living room? Then a large subwoofer is worth considering since it moves more air (and thus produces more bass). Is this sub going into a cozy den or bedroom? Then a smaller size may make better sense so you don't overwhelm your space.

Klipsch subwoofer in living room

Choose a sub that appropriately matches the size of your room as well as the size of your other speakers.

How much bass do you want?

The question of "how much sub should I get?" is a personal consideration. I'm really into dinosaur and spaceship movies, so I like bass that thunders and makes my room quake. I went through several smaller subs before landing on my current 12" Klipsch, which suits my room and taste for bass perfectly.

If your household is more likely to binge-watch comedy shows or kids movies, you won't need nearly as much "oomph." A smaller sub is the way to go, even if you have a big room.

My colleague and fellow home speaker enthusiast Emily has the same beefy Klipsch model that I have, and loves it.

How much power do you need?

One of the best things about a powered subwoofer is that its amplification is built right in. That means you don't need to shop for a separate amp to drive it.

So how much power do you actually need? Honestly, there's no cut-and-dry answer to that (and I'm not sure boring you with the engineering details is helpful). But generally speaking, the higher the amp's wattage, the more powerful and impactful the bass. My advice is to go for as much power as your budget allows, but don't overspend for higher wattage just for the sake of a bigger number.

The spec to pay attention to is the sub's continuous power, or RMS rating. You'll also see a "peak power" rating listed on many powered subs. While flashy on paper, this measurement doesn't factor much into real-life performance, and is safe to ignore during your selection process.

Klipsch SPL-120 Powered subwoofer

The 12" Klipsch SPL-120 is powered by a 300-watt RMS amplifier — an ideal choice for getting deep, well-controlled bass in medium-sized rooms.

Which is better, sealed or ported?

You'll see two main types of subwoofer enclosures: sealed and ported. Sealed enclosures (also known as acoustic suspension) are just as they sound: air doesn't move in or out. This tends to make them quick and responsive with tight, accurate bass.

Ported boxes (or bass reflex enclosures) have a built-in air vent that helps reinforce low bass output. You'll typically get more powerful bass from a ported enclosure without needing as much power. But there's a tradeoff: ported boxes can be considerably larger than their sealed box counterparts.

So which sounds better? There's no clear-cut winner when it comes to home theater applications. Both designs offer clean, hard-hitting bass for movie soundtracks.

But if you listen to music on your home theater system, the type of enclosure can have a more audible impact. If you like jazz, classical, or other acoustic genres, I recommend a sealed enclosure. If you prefer hard rock, hip-hop, or EDM, a ported design is generally a better choice.

SVS bass.

The massive 13-1/2" SVS PB-4000 uses three carefully tuned ports to reinforce low-frequency output.

What are passive radiators?

Some subs use passive radiators to reinforce bass output. These are unpowered cones within the sub enclosure that move in tandem with the powered driver. Passive radiators add extra "oomph" to the subwoofer's output without increasing the sub's amplifier size.

Where should your sub go?

Measure the area where you plan on putting your sub to get a sense of its footprint. You'll want to make sure that the sub you're considering will fit comfortably into your desired location.

Don't forget that you'll need to connect your sub to an outlet for power, as well as to your receiver for signal. Check out my article on home theater speaker placement for tips on arranging your system.

Tip: Use an isolation platform to stop to the rattling

Quick story: my living room has glass bookshelf and fireplace doors, along with tall windows that line three of its walls. All of these used to rattle like crazy when bass hit during movies. It drove me nuts!

One day I decided that I'd had enough. I bought an isolation platform to decouple my sub from the hardwood floor. Voila! Just like magic, the rattling and vibrations instantly disappeared. I even had to dial the sub back because the bass was suddenly stronger. It is without a doubt the best money I've ever spent on my system.

Foam SubDude

A subwoofer isolation platform, like the Auralex SubDude-II™, can make a huge difference in how your sub sounds.

Add a second sub for better bass in your room

Home theater receivers use an RCA output for their subwoofer connection (that's the ".1" in a 7.1 system). Some receivers have two subwoofer outputs, which let you easily add a second sub to your system.

Using two subs improves bass distribution around your room, which is especially helpful if you have multiple seating locations. A dual-sub setup is also a great way to go if you crave lots of bass in your room. Here are home theater receivers that have two subwoofer outputs.

Room with two subwoofers.

Use two subwoofers in your room to hear balanced, chest-thumping bass from all of your seats.

Tailoring your sub's sound to your room

We've seen some pretty cool advancements in the world of subwoofer technology. The biggest is room-correction software that lets you shape your sub's sound to match your room's acoustics.

Some subs have advanced digital signal processing built right in. For example, Definitive Technology's Descend DN12 has onboard controls for adjusting its DSP system. This lets you precisely tailor the sound to get the best performance in your space.

An even simpler way of dialing-in your sub is by using an app on your phone. "Smart subs," like ELAC's Debut 2.0 SUB3030, use your smartphone's microphone to capture a near-field measurement of the sub's output. It then compares how things sound from your seat, and automatically smooths out the EQ curve to give you the best sound.


One benefit to a smart sub is that there are no knobs or dials to fiddle with on the rear panel. Just fire up the app on your phone to make changes.

Should you consider a "wireless" subwoofer?

Earlier I mentioned that your sub needs to connect to your home theater receiver for signal. Usually this means running and concealing a long cable from one part of the room to another (everyone's favorite, right?).

A growing number of subs can receive signal wirelessly from a transmitter than connects to your receiver. Some subs include the transmitter in the box. For others, it's available as an optional accessory.

There's also a wireless kit that transforms virtually any sub into a "wireless sub." Remember that your sub still needs to plug into an outlet for power, or better yet a power protection device.

MartinLogan SW2-TRD Wireless subwoofer adapter kit

MartinLogan's SW2-TRD wireless subwoofer adapter kit uses a transmitter and receiver to send signal to your sub without using a long cable.

Connect with us for a personalized recommendation

Have questions about choosing the right sub for your room? One of the great benefits of shopping with Crutchfield is working with an expert Advisor. Contact us for one-on-one shopping advice.

Our advisors can send specific Crutchfield pages to your screen, saving you a lot of browsing time. Best of all, they know the gear inside and out, so they can help you make the right choice.

Get the most out of your new subwoofer

Once you've gotten your new sub home, check out our tips for set-up to get the best sound possible from your system. Free lifetime tech support is included with every Crutchfield purchase.

Jump into the conversation

If you have a question about a sub you're considering — or want to pick my brain on anything in the article — leave a comment below. I respond quickly, and if I don't know the answer I'll find someone here that does. Thanks for reading!

  • Mario

    Posted on 4/18/2024

    Salve, ho una coppia di altoparlanti da scaffale attivi Dali Oberon 1c guidati dal sound hub compact in una stanza di circa 20 mq, sono indeciso sul subwoofer da acquistare tra Svs sb-2000 pro e Dali e-12f, mi interessano sia musica che home teatro, cosa mi consiglia? Per il settaggio filtro passa basso, il sound hub compact provvede automaticamente o posso gestirlo io (penso all'app Svs, la potrei sfruttare?)? Grazie per consigli

  • Rickie from NC

    Posted on 1/2/2024

    Unless I missed it, I apologize but what about downward versus forward firing subs. In other words, what would the environment have to be for each one to succeed? Thanks!

  • marcos from ellenton, florida

    Posted on 6/29/2023

    i"m looking for steal shots for pangea ds-200 speaker stands

  • Will

    Posted on 3/10/2023

    Will from Bristol Posted on 2/3/2023 Kramer, I have an Anthem 710 receiver powering Paradigm Premiers 800F and Monitor Atoms. I Currently have the Paradigm V10 subwoofer and would like to run dual subs. My question. Would you recommend the Paradigm X 10 or X 12 subwoofer to run dual subs with my system? Thanks, Will

  • John Mark Richardson from Foley

    Posted on 2/17/2023

    I'm looking for a subwoofer to supplement my Focal 302's. Strictly a 2 channel, music only system. Audio Research D200 SS amp. Van Alstine tube pre. Room is 24x24, 8' ceiling. Seating area is 10' from speakers. White would be a plus. Might get a 2nd sub.

  • Will from Bristol

    Posted on 2/3/2023

    Kramer, I have an Anthem 710 receiver powering Paradigm Premiers 800F and Monitor Atoms. I Currently have the Paradigm V10 subwoofer and would like to run dual subs. My question. Would you recommend the Paradigm X 10 or X 12 subwoofer to run dual subs with my system? Thanks, Will

  • Dave Swenson from Davis

    Posted on 1/5/2023

    I just bought the KEF LS50w Wireless II speakers and would like to get a subwoofer. I will use them for listening to HiRes music only. My listening room is large (21' x 21' w/ cathedral ceiling) I'm currently considering the KEF KC62 or the SVC SB-2000 Pro, but also open to any other recommendations (price < $1500) I am more interested in having accurate tight bass, rather than a loud booming effect Do you have a suggestion? Thanks Dave

  • Dan from Denver

    Posted on 11/10/2022

    We're looking add a subwoofer to our music only system consisting of Klipsch Heresy IV driven by Cambridge Audio CXA81 in a midsized room. We're considering a single SVS SB-1000 Pro, the PB-1000 Pro, and the SB-2000 pro, but wonder which would pair best with the Heresy's or if there are other better options to choose? We listen to classic rock, jazz, blues and instrumental piano.

  • larry ringo from muncie

    Posted on 9/27/2022

    looking for info for best sub, if needed, to go with a pair of rp8000f in large room, high ceiling, tile floor and lots of windows. room is 22x32 feet. listen to mostly jazz and blues. thank you

  • Dave Dehlin from Highlands Ranch, CO

    Posted on 8/8/2022

    I'm looking for a sub to add to my KEF LS50 Wireless II speakers that I recently purchased from Crutchfield. My room is 16x20 with a 19' ceiling. I'd like to add a sub to get more bass. Some subs I've been considering are the KEF KC62, or the KEF KF 92. I've talked to a few different folks at Crutchfield over the past few months who have given various recommendations. In addition to the KEF 62 & 92, some recommended the 12" Klipsch SPL-120, the Klipsch C Series C-310ASWi, the SVS SB-2000 Pro, the Klipsch SPL-150 15, and the SVS SB2000 Pro. I would also like to use a wireless device for the sub. I welcome your input and recommendations.

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