Subwoofer placement 101: where should it go?

Watch on YouTube · 6 minutesWhere Should You Put Your Subwoofer? Get Better Bass for Free

Where is the best place to put a subwoofer?

Start with places you can actually live with. A result that blocks a doorway is not much use. Choose two or three candidates with room for the cabinet, cables, ventilation and the clearances in its manual.

A. Along the front wall

Try a spot near the front speakers, slightly to one side of the room's centre line. It is usually a practical first candidate. Genelec's placement guidance uses an off-centre front-wall position as a starting point, then recommends trials and measurements.

B. A front corner

A corner can give useful extra output. It can also make some notes too prominent. Include it in the comparison rather than accepting or rejecting it on principle. SVS recommends testing a corner and checking the result in the room.

C. Another usable wall position

Try the opposite end of the front wall or a side-wall position if the first two disappoint. A rear position is also a candidate when furniture dictates it. Mark each spot with removable tape and label it A, B or C so your notes stay useful.

Why does moving a subwoofer change the bass?

Low-frequency sound reflects from the room's boundaries. At some frequencies those reflections reinforce the sound at your seat; at others they partly cancel it. The room's resonances are called room modes.

Moving the sub changes how it excites those resonances. Moving the seat changes where you hear them. That explains the familiar experience of strong bass by the wall and very little in the middle of the sofa. Genelec explains how source and listener positions affect these peaks and nulls.

So “bass spreads in all directions” does not mean placement is irrelevant. A room plan can suggest a starting point, but it cannot tell you which position wins in an open-plan living room with an alcove and a stairwell. Even Room EQ Wizard's room simulator is explicitly a model of a rectangular room. Check what happens in yours.

A simple subwoofer-placement comparison

If the sub barely contributes anywhere, work through the power, connection and routing checklist before comparing locations.

Give each candidate the same chance. Before moving anything, photograph the controls and note which receiver preset is active. For the first pass, keep the listening seat, volume, crossover, phase and processing fixed. If you decide to bypass room correction, do so for every candidate and save the original preset first.

1. 1 · Pick a passage

   Use a short, familiar bass line with several different notes. Loop the same section at a comfortable level. One huge movie impact tells you little about the notes around it.

2. 2 · Listen at A

   Write down what bothers you: a note that booms, a note that disappears or bass that draws your attention away from the music.

3. 3 · Try B and C

   Move the sub safely, return to the same seat and repeat. Keep the source and settings unchanged. Do not turn up a disappointing position to help it win.

4. 4 · Check other seats

   If you share a sofa, listen from the other occupied places too. Decide whether your priority is one excellent seat or a reasonable balance across several.

5. 5 · Revisit the best two

   Go back to the first candidate before deciding. If the difference is unclear, keep the more practical spot or repeat the comparison with a measurement.

Judge consistency, not just weight. At unchanged settings, one position can be louder overall. Note that separately from whether individual notes jump out or vanish. After choosing a location, reset the sub's level for a sensible blend with the speakers.

The subwoofer crawl can help you make a shortlist

The classic shortcut reverses the test: place the sub securely near your listening position, play a repeating bass passage and listen near possible sub locations. Mark the places where the bass is most balanced. Then put the sub in a candidate spot and verify it from your normal seat. Our full subwoofer-crawl guide explains the method and its limitations.

If lifting the sub into position is awkward, use the direct comparison above. There is no need to balance a heavy cabinet on furniture to do a useful placement test.

What if you only have one possible spot?

Work with the space you have. First confirm the sub has its required port and ventilation clearance. Then try modest changes within that space, recording exactly what moved. If the cabinet cannot move, compare a slightly different listening position. Even a useful compromise deserves a proper test.

If bass is healthy elsewhere but missing at your seat, follow our guide to bass disappearing at the listening position. If one note overwhelms everything, start with the boomy-bass checks. Turning up the sub is unlikely to be a satisfying answer to either symptom.

Placement first, then level, crossover and phase

Once you have a promising position, integrate it with the main speakers. Follow your receiver and subwoofer manuals for level calibration, bass management and phase or delay adjustment. If you use automatic room correction, rerun the manufacturer's calibration procedure after the move, then listen again.

A common crossover setting such as 80 Hz is a starting point for some systems, not a universal answer. Our subwoofer crossover guide walks through the handoff and which device controls it. Avoid changing position and three controls at once, because you will not know which change helped.

Where should two subwoofers go?

With two subs, the question becomes how the pair behaves together across the seats. Welti and Devantier's research shows how multiple subwoofers can reduce seat-to-seat bass variation. That does not make any two positions automatically good.

Measure or listen to the pair together, and use the system's supported alignment procedure. Two separately chosen “best” locations do not account for the way the subs combine. If your goal is a whole sofa with consistent bass, treat those extra seats as part of the test from the start.

Use Room Tuner to compare the positions you try

Room Tuner Pro includes a guided subwoofer-placement experiment. Keep the iPhone at the listening seat, move the sub between candidates and compare the readings. You make the physical changes; the app helps you assess them.

Use the same phone position, orientation, playback path and volume each time. An iPhone is useful for controlled comparisons, but its microphone is not a calibrated reference for the deepest bass or absolute sound levels. Read what a phone measurement can and cannot tell you before treating a chart as a verdict.

You can measure one room for free with a compatible iPhone and AirPlay 2 playback system. The guided placement experiments are part of Pro.