ToolHuts

Praktische Tools für exaktes Arbeiten

Rechner für Verstärkerleistung & Lautsprecher-Schalldruck

Schätzen Sie den Schalldruckpegel (SPL) am Hörplatz und rechnen Sie umgekehrt die benötigten Watt pro Lautsprecher für einen Zielpegel plus Headroom.

dB
W
m
dB
dB
dB
Estimated SPL104.5dB
Target plus headroom103.0dB
Required power per speaker71.3W
Array gain assumption3.0dB
Power margin1.5dB

Power is continuous watts per active speaker. The multi-speaker gain assumes coherent equal sources, which is an upper-bound simplification outside tightly matched positions.

Funktionsweise

How to use it: use a measured or manufacturer sensitivity referenced to 1 W at 1 m, then enter distance, power and an explicit room-gain assumption.

Formula. SPL = sensitivity + 10 log10(power) - 20 log10(distance) + source gain + room gain.

Example. One 88 dB speaker at 100 W and 3 m produces about 98.5 dB before room gain.

Beispiel mit aktuellen Eingaben

Das Ergebnis oben verwendet genau diese Werte. Dieser Datensatz wird beim Drucken einbezogen, damit die Ausgabe mit den ursprünglichen Messungen geprüft werden kann.

Sensitivity (1 W/1 m)
88 dB
Power per speaker
100 W
Listening distance
3 m
Speakers reproducing the same signal
2
Assumed room gain
3 dB
Target SPL
100 dB
Headroom
3 dB

Hauptergebnis: Estimated SPL: 104.5 dB.

Vor Verwendung des Ergebnisses

  • Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
  • Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
  • When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.

Einschränkungen

This is a broadband free-field estimate. Impedance, compression, clipping, frequency response, boundary effects, crest factor and speaker power handling can dominate. Do not size equipment from this result without manufacturer limits.

Häufig gestellte Fragen

Does double power add 3 dB?

Ideally, yes. Real speakers may add less at high output because of thermal and mechanical compression.