SBIR & Wall Dip Visualizer

Drag your speaker. See the exact bass nulls from front, side, and rear walls — then hear them.

Room lengthm

Room widthm

Speaker from left wallm

Speaker from front wallm

Rear wall21 Hz
wall behind the listening area (bottom of plan)
4.00 m to wall · -8 dB dip
Right wall29 Hz
right side of the plan
3.00 m to wall · -9 dB dip
Front wall86 Hz
wall the speakers face away from (top of plan)
1.00 m to wall · -14 dB dip
Left wall86 Hz
left side of the plan
1.00 m to wall · -14 dB dip

Hear the dip

0:00 / 0:00

Your speaker is 1.00 m from the left wall, creating a -14 dB null at 86 Hz.

Preview only — open the 3D builder for full placement, treatment, and analysis.

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What is SBIR?

Speaker Boundary Interference Response is the cancellation that happens when sound from your speaker reflects off a nearby wall and arrives out of phase — typically a quarter wavelength later. The null frequency is f = c / (4 · d), with c = 343 m/s.