Dual Pro optimal power output?

[Elztalbiker]

@ David:
The doubling is normaly by factor 10
1 to 10
10 to 100
100 to 1000


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[David A]

@Elztalbiker

When it comes to sound pressure level which is measured in decibels which have a logarithmic scale, a doubling of power produces a 3 dB increase in sound pressure level. I think what you're referring to is the fact that if you multiply the power by 10, then you increase the sound pressure level by 10 dB so 10 W produces 10 dB more than 1 W, 100 W produces 20 dB more than 1 W and 10 dB more than 10 W, 1000 W produces 30 dB more than 1 W and 10 dB more than 100 W, and so on.

That is implicit in the fact that a doubling of power produces a 3 dB increase in SPL. Doubling the power from 1 W to 2 W produces a 3 dB increase in SPL over 1 W, doubling power again to 4 W produces a further 3 dB increase and doubling again to 8 W produces another 3 dB increase for a 9 dB increase over 1 W. A further 2 W increase to 10 dB (less than another doubling) produces another 1 dB increase for a total of 10 dB.

So the rule is that doubling the power produces a 3 dB increase which also means that multiplying the power by 10 produces a 10 dB increase in SPL because of the way the logarithmic scale used for the decibel range works.

You can see this in the table in the "Power" sub-section of the Weighting section in this link: https://www.audioholics.com/frequent-que...ts-and-dbs

[thumb5]

@David A I think the confusion was due to this slip of the pen:

A doubling of amplifier power results in an increase of 3 dB in volume

I think you meant to say "sound pressure level" rather than "volume".

[Elztalbiker]

@ David A:

Jepp, we are together.


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[David A]

@David A I think the confusion was due to this slip of the pen:

A doubling of amplifier power results in an increase of 3 dB in volume

I think you meant to say "sound pressure level" rather than "volume".

You're right. I found myself making that mistake a few times as I typed and corrected it but it looks like I didn't catch all of my slips.