Do you need a subwoofer with a soundbar?
Updated June 2026Independently researchedNo paid placement.
For most people, the answer is no – you do not need a subwoofer with a soundbar if you watch mostly dialogue-heavy TV in a small room. But if you crave the chest-thump of an action movie, play bass-heavy games, or have a large open space, a subwoofer makes a genuinely noticeable difference that a soundbar’s built-in drivers simply cannot match.
What does a subwoofer actually do that a soundbar can’t?
A soundbar’s built-in drivers are physically limited by size and cabinet volume. They can produce midrange and treble cleanly, but they struggle to reach frequencies much below 80Hz – the range where you feel bass rather than just hear it. A subwoofer is designed specifically to handle those lowest octaves, from about 20Hz to 80Hz, moving enough air to create the physical pressure that makes explosions rumble and bass lines punch. Without a sub, you miss that tactile layer. Dialog and high frequencies remain clear, but the foundation of the soundtrack – the low-end energy that gives movie scenes weight – simply isn’t there. A subwoofer fills in that missing half of the audio spectrum, and no amount of digital signal processing in a slim soundbar can fake the physical sensation of moving air.
When is a soundbar’s built-in bass good enough?
If you watch mostly talk shows, news, sitcoms, or dramas in a small bedroom or apartment living room, a quality soundbar’s built-in woofers may be perfectly adequate. Many modern soundbars use passive radiators or ports to extend low-end response a bit, and in rooms under about 150 square feet, that extra kick is often enough to feel satisfying without overwhelming the space. Built-in bass also avoids the hassle of finding space for a separate box. For casual TV listeners who prioritize vocal clarity and clean sound over cinematic rumble, skipping the sub is a reasonable choice. The key is to listen first – if you can clearly hear bass in music and movie effects without straining, you likely don’t need a sub.
When does a subwoofer make a real, immediately noticeable difference?
For action films, blockbuster soundtracks, live concerts, and gaming, a subwoofer transforms the experience. The difference isn’t subtle – it’s the difference between hearing an explosion and feeling it in your chest. Games like racing sims or first-person shooters rely on low-frequency cues for immersion, and a sub provides that tactile feedback a soundbar alone can’t deliver. Room size matters too. In a large living room or open-concept space, the soundbar’s built-in drivers simply can’t pressurize the volume of air needed to create deep bass. A dedicated sub, with its larger driver and amplifier, handles that job efficiently. If your room is over 300 square feet or open to a hallway, a sub is almost essential for satisfying movie bass.
Wireless vs wired subwoofers: which is more reliable?
Most soundbar subwoofers today are wireless, connecting via a proprietary 2.4GHz or 5GHz radio link. Wireless is convenient – no long cable runs across the floor – and in practice, it works well for the vast majority of setups. Occasional dropouts or interference from other Wi-Fi devices can happen, but on reputable models it’s rare. Wired subwoofers (connected by a standard RCA or speaker cable) offer zero latency and absolute reliability. However, you need to run that cable from the soundbar to the sub, which can be tricky in a furnished room. Some high-end soundbar systems allow both options. For most buyers today, wireless is fine – just place the sub within about 30 feet of the soundbar and avoid placing it inside a cabinet.
Where should you place a subwoofer for best results?
Placement rules for a soundbar subwoofer are the same as for any sub. A corner location reinforces bass by reflecting sound off two walls, giving you more output with less amplifier power. But don’t put the sub directly behind the soundbar – the bass will be directional near the crossover frequency. A few feet to the side or in a front corner is ideal. In small rooms, be cautious: placing a subwoofer in a tight space can excite room modes, creating boomy or muddy bass that actually sounds worse than no sub at all. Experiment with the sub’s position – the “crawl test” (placing the sub at your listening position, crawling around to find where bass sounds best, then putting the sub there) works well. Many subwoofers also have a crossover dial that you can adjust to blend with your soundbar, typically around 80–120Hz.
Can you add a third-party subwoofer to any soundbar?
No – and this surprises many buyers. Most soundbars do not have a dedicated subwoofer output (a “sub out” port). Without that, you cannot connect a third-party subwoofer directly because the soundbar’s amplifier doesn’t separate the low frequencies. The subwoofer included with a soundbar system is almost always proprietary, using a wireless connection or a special cable that only works with that specific brand. Exceptions exist. Some premium soundbars (like certain models from Sonos, Samsung, or LG) offer a subwoofer output or allow pairing with a brand-specific wireless sub. There are also universal wireless subwoofer adapters, but they require the soundbar to have a preamp output or headphone jack – a setup that’s rare on all-in-one soundbars. Your safest bet is to buy a soundbar that includes the sub you want from the start.
Frequently asked questions
Do all soundbars come with a subwoofer?
No. Many budget-friendly soundbars are single units with only built-in woofers. Mid-range and premium models often bundle a separate wireless subwoofer, but it’s not universal. Always check the product description – if it says “soundbar only” or “2.0 channel,” there’s no sub included.
Is a subwoofer worth it for a small apartment?
It depends on your neighbors. A subwoofer in a small apartment can easily transmit bass through floors and walls, leading to noise complaints. If you value relationship with neighbors, a soundbar with good built-in bass may be the wiser choice – or get a sub with a volume control you can keep very low.
Can I use a subwoofer from another brand with my soundbar?
Almost never. Soundbar subwoofers use proprietary wireless protocols or special connectors. There are no universal standards. You cannot, for example, pair a Vizio sub with a Samsung soundbar. Stick to the same brand for the sub that came with the soundbar system.
Will a subwoofer disturb my neighbors?
Yes, likely. Low frequencies travel through walls and floors much more easily than high frequencies. Even at moderate volumes, a sub can be heard in adjacent rooms. If you live in an apartment, consider placing the sub on a decoupling pad and keeping the volume low, or skip the sub altogether.
Do I need a subwoofer for movies or just music?
Both benefit, but the need is more obvious for movies. Action films and sci-fi have deep bass effects as part of the soundtrack design. Music with bass guitar or kick drum also sounds fuller with a sub. If you mostly watch dialogue-heavy content, the sub’s impact is smaller.
How do I know if my soundbar’s built-in bass is sufficient?
Play a scene with explosions or a song with deep bass (e.g., an electronic track or bass-heavy hip-hop). If the sound feels thin or you can’t feel any physical sensation, you would benefit from a sub. If it sounds full enough for your taste, you’re fine without one.