Speaker Asylum

General speaker questions for audio and home theater.

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RE: Zu Soul Supreme sensitivity

Posted by b.l.zeebub on June 4, 2017 at 12:11:57:
Compared to a free field measurement every boundary introduced will result in a 3dB rise in bass output.

So compared to free-field a speaker placed on the floor but away from walls gives +3dB;
placed on a wall another +3dB and corner placement adds a further 3dB resulting in a theoretically possible 9dB rise.

If you now measure SPL from 20-20kHz as a single figure it will seem as if the speaker is remarkably sensitive.
Less so if you measure SPL at 1kHz where corner loading has very little effect.