Where you put your subwoofer changes its sound more than almost anything else, including which model you bought. Move a sub two feet and the bass at your seat can go from boomy to thin to just right. The good news: finding the best spot is free and takes about 15 minutes.
- Start with the sub along the front wall, a couple of feet from a corner.
- Use the subwoofer crawl (below) to find the smoothest spot.
- Avoid placing it directly behind your seat or inside furniture.
- Run room correction after you’ve chosen the spot.
Check the result at your seat. The room check in our free subwoofer test tones tool charts your bass response using a cheap decibel meter or a phone app, so you can compare one sub position with the next.
Why placement matters so much
Bass wavelengths are long, from about 5 feet at 200 Hz to over 50 feet at 20 Hz. In a room, those waves reflect off walls, floor and ceiling and combine with the direct sound. At some frequencies they pile up (peaks, which sound boomy); at others they cancel (nulls, where a note almost disappears). These “room modes” depend on where the sub is and where you sit. Change either and the bass changes.
Try it on your own room first. Our free subwoofer placement calculator takes your room size and seat position and shows a heat map of where the bass will be smoothest, so you know where to start the crawl.
The subwoofer crawl (do this first)
This sounds silly but works because of reciprocity: the bass you hear at position A from a sub at position B is the same as you’d hear at B from a sub at A.
- Put the subwoofer on your main listening seat (or as close to ear height there as you can).
- Play a track with a steady, walking bass line, or a bass sweep from a test disc or app.
- Crawl around the front half of the room at floor level, especially along the front wall and the front half of the side walls.
- Listen for the spot where bass sounds loudest and most even, with each note at similar volume.
- Put the sub there. Fine-tune by a foot or so either way.
Better still, measure. A free app like Room EQ Wizard with an inexpensive USB measurement microphone shows exactly where peaks and nulls sit, and makes comparing positions easy.
Common positions compared
| Position | What happens | Verdict |
|---|---|---|
| Front wall, off-centre | Good output, fewer extreme peaks | Best starting point |
| Front corner | Most output, but excites every room mode | Try it, but watch for boom |
| Side wall, front half | Often smooth; useful backup | Worth testing |
| Front wall, dead centre | Can create a deep null at the centre seat | Test before committing |
| Behind the sofa (nearfield) | Very loud at the seat, but locatable and can rattle | Only for special cases |
| Inside a cabinet | Rattles, boom and overheating | Avoid |
With a soundbar, the same rules apply but keep the sub in the front half of the room. See placement with a soundbar.
Floor, height and flooring
Subs are designed to sit on the floor; the floor boundary reinforces bass. Raising a sub on a stand usually reduces output a little and rarely helps. See should a subwoofer be on the floor? On carpet, use spikes or a solid platform so the sub doesn’t rock (details here). On suspended wooden floors, an isolation platform can reduce rattles.
Two subwoofers
Two subs on opposite walls (or opposite corners, or the front and rear wall midpoints) excite room modes differently and partly cancel each other’s peaks and nulls, giving smoother bass across several seats. See dual subwoofer setup.
After placement
- Set your crossover (80 Hz is the usual start).
- Check phase at your seat.
- Run your receiver’s room correction or the sub’s app EQ.
- Set the level so the sub blends in.
What not to do
- Don’t pick the spot purely for looks without checking how it sounds.
- Don’t block a port against a wall or furniture.
- Don’t hide it inside an enclosed cabinet. See why.
- Don’t judge from a single seat if others matter too.
Related: down-firing vs front-firing subwoofers and fixing rattles after you move the sub.