The equilateral triangle rule
Correct studio monitor setup starts with an equilateral triangle between the two monitors and your head. Same side at all three points.
- Distance between tweeters = distance from each tweeter to your head
- For domestic nearfield: typically between 1.0 m and 1.4 m per side
- Monitors point at your ears at 30° from the centre axis
If the distance is under 80 cm, monitors "stack" in the centre and stereo collapses. Over 1.6 m in a domestic room, you're no longer in nearfield and the room starts weighing more than the monitors.
Tweeter height
The tweeter (the small driver that reproduces highs) should be at ear height when seated. Not the woofer — the tweeter.
For most people in an office chair, that means the tweeter at 115-125 cm from the floor. If your monitor has the woofer on top and tweeter below, height still goes to the tweeter.
Why it matters: highs are very directional. A 15° off-axis deviation loses 3-6 dB in high frequencies. If tweeters end up too high or too low, you hear a mix with less brightness than it actually has.
Orientation: vertical or horizontal
Most studio monitors are designed to be placed vertically. The reason is physical: horizontally, the spacing between the two monitors' tweeters changes, and phase cancellation appears in mid-high frequencies when you turn your head.
Exception: some specific monitors (especially large meterbridge units) are designed for horizontal placement. If unsure, always vertical.
Wall clearance
Pushing monitors against a wall boosts bass frequencies through coupling. Minimum distance depends on port type:
- Rear port: at least 30-40 cm from wall
- Front port: 10-20 cm is acceptable
- From corners: as far as possible. A corner boosts bass by up to 9 dB
No exact rule: the further from walls and corners, the cleaner the bass. The compromise is available room depth.
Stands and decouplers
A monitor directly on the desk transmits vibration to the worktop. The desk acts as a resonating box and adds ugly colouration between 80-200 Hz. One of the most underestimated problems in home studio.
Solutions:
- Floor stands (bolted or weighted) behind the desk — best option
- Decouplers (high-density foam or IsoAcoustics platforms) on the desk — practical option if stands don't fit
- Never: monitor directly on the wooden worktop
Real cost of decent decouplers: €40-80 per pair. The difference is immediate and audible.
The desk as reflector
The desk surface between you and the monitors acts as an acoustic mirror. Direct sound from the woofer bounces off the desk and reaches your ears with a 1-3 ms delay, generating a "comb filter" in mid frequencies.
Partial solutions:
- Raise monitors with stands to move the cone away from the surface
- Slightly tilt the desk or use a thick cloth (yes, really: it helps)
- Better: an absorber panel placed between the monitors on the desk
Symmetry with the room
The monitor pair should be symmetrical with respect to side walls. If the left has a wall at 50 cm and the right at 1.20 m, early reflections arrive at different times and stereo shifts.
Ideal: listening position centred between side walls, with absorber panels at symmetrical first reflection points (same panel count left and right).
Quick checklist
- Equilateral triangle, 1.0-1.4 m per side
- Tweeter at ear height (115-125 cm)
- Vertical monitors, 30° angled toward you
- Wall clearance based on port
- Decoupled stands or IsoAcoustics
- Symmetry with side walls
- Symmetrical first reflection panels
If your room allows it, this setup is half the work. The other half is acoustic treatment, which you can calculate free here with your room dimensions.