Speaker Delay Calculator (Delay Towers & Fills)
Distance ÷ speed of sound = the milliseconds of delay your fill or delay-tower speakers need, temperature-corrected, with the Haas offset explained.
Sound crawls — about 2.9 ms per metre at 20 °C — so a delay tower 30 m from the main PA must be electronically delayed ~87 ms or the audience hears a slapback echo. Adding a small Haas offset (5–15 ms) on top keeps the perceived image at the stage: the ear localizes to the first arrival, so letting the mains arrive just before the local tower makes the tower acoustically invisible. Temperature matters more than people think — a delay time set at a 14:00 soundcheck in 30 °C sun is off by over a millisecond per 30 m by a 22:00 showtime.
Rule / Formula
Distance ÷ speed of sound = the milliseconds of delay your fill or delay-tower speakers need, temperature-corrected, with the Haas offset explained.
About Speaker Delay Calculator (Delay Towers & Fills)
Distance ÷ speed of sound = the milliseconds of delay your fill or delay-tower speakers need, temperature-corrected, with the Haas offset explained. Sound crawls — about 2.9 ms per metre at 20 °C — so a delay tower 30 m from the main PA must be electronically delayed ~87 ms or the audience hears a slapback echo. Adding a small Haas offset (5–15 ms) on top keeps the perceived image at the stage: the ear localizes to the first arrival, so letting the mains arrive just before the local tower makes the tower acoustically invisible. Temperature matters more than people think — a delay time set at a 14:00 soundcheck in 30 °C sun is off by over a millisecond per 30 m by a 22:00 showtime.
How to use Speaker Delay Calculator (Delay Towers & Fills)
- 1Enter your values into the fields in Speaker Delay Calculator (Delay Towers & Fills).
- 2The result and any pass/fail verdict update instantly as you type — no button to press.
- 3Check the substituted formula and worked example to see exactly how the result was derived.
- 4Copy or note the result for your spec, delivery or planning.
Why use Speaker Delay Calculator (Delay Towers & Fills)?
- ✓Runs entirely in your browser with instant, private results — no data leaves your device.
- ✓Built on a published reference: Speed of sound c = 331.3 + 0.606T m/s.
- ✓Shows the governing formula and a worked example, so you can trust and check every result.
- ✓100% free with no sign-up, no watermark and no usage limits.
- ✓Works on any device — desktop, tablet or phone — and keeps working offline once loaded.
Frequently asked questions
What does Speaker Delay Calculator (Delay Towers & Fills) do?+
Distance ÷ speed of sound = the milliseconds of delay your fill or delay-tower speakers need, temperature-corrected, with the Haas offset explained. Sound crawls — about 2.9 ms per metre at 20 °C — so a delay tower 30 m from the main PA must be electronically delayed ~87 ms or the audience hears a slapback echo.
Is my data private?+
Yes. Speaker Delay Calculator (Delay Towers & Fills) runs entirely in your browser — your inputs are never uploaded, stored or logged.
What standard or source is Speaker Delay Calculator (Delay Towers & Fills) based on?+
It follows Speed of sound c = 331.3 + 0.606T m/s; Haas (precedence) effect — Helmut Haas, 1949. Always confirm against the current official document, as specifications and rates can change.
What formula does it use?+
Speaker Delay Calculator (Delay Towers & Fills) uses: c = 331.3 + 0.606 × T (m/s); delay = distance ÷ c; add 5–15 ms Haas. The tool shows this formula with your own numbers substituted so you can verify the result.
Is Speaker Delay Calculator (Delay Towers & Fills) free to use?+
Yes — it is completely free with no account, no sign-up and no usage limits. There is no watermark and no paywall.
Embed Speaker Delay Calculator (Delay Towers & Fills) on your website
Want Speaker Delay Calculator (Delay Towers & Fills)on your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/speaker-delay-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Speaker Delay Calculator (Delay Towers & Fills) — ToolJolt" loading="lazy"></iframe>Related Broadcast tools
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