Room Mode Calculator: Fix Bass Problems

By Priya Nair · October 17, 2026

Understanding Room Modes

Room modes are resonant frequencies caused by sound reflecting between parallel surfaces. They create peaks and nulls that distort bass response.

Axial modes are the strongest. Calculate: f = 171.5 / L (meters) or f = 1130 / (2 x L) (feet).

Enter room dimensions and find all modal frequencies below 300 Hz. Look for clustering near the same frequency.

Place broadband absorbers in corners. Mineral wool panels 4-6 inches thick handle modes down to 40 Hz.

Move speakers from walls. The rule of thirds avoids most modal peaks and nulls.