Speaker placement and listening position
The free adjustment that changes the most
No cable or DAC will compensate for sloppy placement. Moving a speaker 20 cm shifts bass response by several decibels and completely redefines the soundstage. This guide gives a stepwise method: geometry first, then bass tuning, then orientation.
Set the basic geometry
Start from a near-equilateral triangle: tweeter-to-tweeter spacing equal to the distance to your ears, within 10 %. A wider triangle gains scale but hollows the centre; a narrower one densifies the centre and shrinks the stage.
Lateral symmetry comes first: both speakers must see the same wall at the same distance, within 2-3 cm. A 20 cm asymmetry is enough to skew imaging and decorrelate left/right reflections.
Do not sit against the rear wall: leave at least 50 cm, ideally 80 cm to 1 m. Against the wall you hear the sum of direct sound and a very early reflection, which bloats bass and blurs detail.
Tune bass with front-wall distance
Distance to the wall behind the speakers controls the first reflection cancellation (SBIR). 60 cm puts a dip around 140 Hz; 90 cm moves it to about 95 Hz; 40 cm pushes it to roughly 210 Hz. Choose the distance that places the dip outside your music's most audible range.
In practice, test three positions (say 35, 60 and 90 cm) with the same double-bass or kick-heavy track and judge note-to-note evenness rather than bass quantity.
Avoid seating exactly at one third or two thirds of the room length: those points often land on a modal node or peak. Shift 10 to 15 cm if bass notes are uneven.
Side walls and toe-in
Keep at least 50 cm from side walls when possible. If you cannot, treat the first side reflection instead of pushing the speakers even closer.
Set toe-in in small steps: start with parallel axes, then toe in 5° at a time until the centre is compact without the treble hardening. Wide-dispersion speakers usually want 5 to 10°, narrow-dispersion designs sometimes 15 to 20°.
Vertical tilt matters too: if the tweeter sits above ear height, 1 to 2° of rake often rebalances treble and phase coherence.
A listening method to validate
Use three constant tracks: a solo voice (centring and density), a descending double bass or piano line (bass evenness), and a wide acoustic recording (depth and width).
Change one variable at a time and mark floor positions with tape: without markers you will lose the best spot.
Listen at your normal level: tonal balance shifts with volume, and a position that sounds bright quietly can be perfect at real level.
Common mistakes
- Optimising cables or sources before locking down placement.
- Speakers symmetrical in the room but the listener off-centre, or the reverse.
- Excessive toe-in 'for precision', hardening treble and shrinking the stage.
- Sitting against the rear wall or in a corner.
Checklist
- Equilateral triangle within 10 %, tweeters at ear height.
- Side-wall distances matched within 2-3 cm.
- Front-wall distance tested at three values.
- At least 50 cm between listener and rear wall.
- Toe-in set in 5° steps, positions marked on the floor.