How the monitor triangle calculator works
The calculator starts from the 60° stereo reference triangle, then adds practical setup checks: toe-in axis crossing point, side wall clearance, listener depth from the speaker line, and tweeter height. The optional front reference depth is only used for the placement note; monitors can be on stands, shelves, a console bridge, or a desk.
Key terms
- Equilateral triangle - 60° angles; standard reference for stereo imaging.
- Toe-in - angling cabinets so tweeter axes converge at the listener or slightly behind the head.
- Axis crossing point - where the left and right tweeter axes meet; crossing behind the listener gives a wider sweet spot and less aggressive toe-in.
- Sweet spot - central listening position with balanced stereo image.
Frequently asked questions
- What is the standard monitor triangle? Speakers and listener form a 60° reference triangle, then toe-in and wall clearance are adjusted for the room and listening width.