Amplifier Power to SPL

Formula and source

SPL(d) = sensitivity + 10*log10(P) - 20*log10(d / 1 m); peak = SPL + crest factor; inverse power P = 10^((target - sensitivity + 20*log10(d)) / 10).

First-principles loudspeaker SPL from the 1 W / 1 m sensitivity reference, the 10*log power term, and the inverse-square distance term (public; ANSI S1.1 decibel basis), by name.

Audience

This tile is built for stage and live production and the adjacent professions in the Stage and Live Production group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

Related tiles

• Truss Point Load and Span Capacity
• Audio Speaker Time Alignment
• DMX-512 Address and Universe Planner
• Three-Phase Neutral Imbalance and Distro
• SPL and Inverse Square Law

Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.