Tech Tools / Speaker Delay
Speaker Delay Calculator
Drag the delay speaker. Distance from the main PA updates live in feet, inches, meters, and milliseconds. Adjust temperature to match the room.
Interactive stage
Drag the amber delay speaker · Arrow keys nudge 1 ft · Touch supported
What this speaker delay calculator does
It converts the distance between a main PA and a delay loudspeaker into milliseconds so you can time-align fills and delays on corporate, medical, and live shows.
Formula
delay (s) = distance ÷ speed of sound. Speed of sound ≈ 331.3 + 0.606·T°C (m/s). At 20 °C that is about 343 m/s.
Worked example
Delay stack 45 ft from the main PA at 22 °C: distance ≈ 13.72 m; c ≈ 344.6 m/s; delay ≈ 39.8 ms. Add a Haas offset if you want the main system to stay the perceptual source.
Common mistakes
- Ignoring temperature on outdoor summer / winter shows.
- Aligning to the nearest delay instead of the acoustic arrival that should lead.
- Forgetting that DSP “delay” and physical distance must be verified with a measurement mic.
FAQ
How do I calculate speaker delay in milliseconds?
Divide distance by the speed of sound. At 20 °C, sound travels about 343 m/s (≈1125 ft/s), so delay_ms ≈ distance_m ÷ 0.343. This tool updates live as you drag the delay speaker.
Should I add Haas / precedence delay?
Many engineers add a small Haas offset (often 5–10 ms) so the delay speaker arrives slightly after the main PA, preserving localization. Use ears and measurement on site.
Does temperature change speaker delay?
Yes. Speed of sound rises with temperature (~0.6 m/s per °C). Hot rooms need slightly less delay for the same distance.
Feet or meters for delay calc?
Either works. This calculator converts freely between feet, inches, meters, and milliseconds.
Need this on a real show?
Kynetic handles live audio design, delay systems, and full event production.