Speaker Asylum

Posted by 6bq5 (M) on June 16, 2017 at 13:20:19

In Reply to: RE: I would guess the op is wanting the watts he is using at the level he describes. posted by Tre' on June 16, 2017 at 08:16:29

The factors are:
type of speaker-
-Planar - flat panel that is LARGE at lest 4 x 7 feet per radiator
-Line source
-dynamic - the speaker that most of us have

>>the planar speaker will have ~0dB fall-off as the distance is doubled
>>the line-source will drop-off at ~3dB as the distance is doubled
>>Dynamic will drop-off (level/volume/Loudness) at ~6dB as the distance is doubled.

Listening distance from the speaker

Your measurement - Peak or Average

If it is peak - then you are going to calculate the max power that you are delivering to you speaker to get the dB reading (at a given distance)-

If, on the other hand, you are measuring average, then you may want to look at how much headroom you want/need....

Thus, if we walk down this path a bit-

let's assume Dynamic speaker - @ 88dB efficiency:

at one meter at 2 meters at 4 meters
88dB = 1 watt: @ dbl'd distance: 82dB=1watt Now 76dB=1 watt
Listening level
96 = +8dB ~ 6.3Watts 96dB= +14dB ~ 25 watts 96dB = +20dB ~ 100W

so - where are you sitting?
and How Loud is it?
Happy Listening

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