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Room speaker placement calculator Created by Audiovisuality P/L

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d&b E12X (D25/5D/25D/D40/D80/D90/40D amps)

A passive subwoofer, 1 x 12 in LF, bass reflex. The figures below have not yet been checked against the datasheet.

Unverified data. Entered from the manufacturer’s page. Check the datasheet before relying on it.

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Specifications used

Maximum level127 dB peak at 1 m
Power300 W (RMS; 1600 W peak (10 ms))
Patternomni
Frequency range45 Hz to ? Hz (-5 dB on axis, standard; 45 to 140 Hz in 140 Hz mode (upper limit 100 Hz as printed; field omitted because validator minimum is 1000 Hz))
Weight18 kg
Size (w × h × d)530 × 358 × 448 mm
Pole socketYes
SourceManufacturer page (2026-10-10)

How the level was stated. 1 m, free field, peak SPL, pink noise crest factor 4, one speaker driven; may deviate with several loudspeakers. Figure depends on amplifier.

Notes. Page states omnidirectional dispersion. M20 threaded flange on top for the d&b stand winder (no pole-mount rating printed). Dimensions printed H x W x D 358 x 530 x 448.

What the figures mean at distance

Taking 127 dB at 1 m on axis and the free-field rule of 6 dB lost per doubling of distance, this is the most the speaker can reach at each distance. A real room adds reflections, and a speaker is not normally run at its maximum.

DistanceLevel on axis
2 m121.0 dB
5 m113.0 dB
10 m107.0 dB
15 m103.5 dB
20 m101.0 dB

See level and distance and coverage angles for how these are worked out.

Planning estimate only. The calculation ignores reverberation, reflections and room modes. See terms and disclaimer.