Good article on SPL

Anything not covered elsewhere.
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Bruce Weldy
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Good article on SPL

#1 Post by Bruce Weldy » Thu Aug 03, 2017 11:15 am

Just came across this......helps to bolster the argument of whether or not manufacturers lie about their output.

http://www.prosoundweb.com/channels/liv ... fications/

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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Bill Fitzmaurice
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Re: Good article on SPL

#2 Post by Bill Fitzmaurice » Thu Aug 03, 2017 12:06 pm

There's no argument to be made, they all lie. None of them post measured results, only calculated, which conveniently ignores both maximum excursion and power compression.

Think
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Re: Good article on SPL

#3 Post by Think » Wed Dec 20, 2017 2:11 pm

This is a great one http://sound.whsites.net/articles/pa.htm

"Let's look at a simple example. Two systems are set up side-by-side. One has an overall sensitivity of 100dB/W/m, meaning that an input of 1W will give an SPL (sound pressure level) of 100dB at 1 metre distance. Power rating is 100W maximum continuous average for this first example.

The second system is rated at 90dB/W/m sensitivity, but has a power rating of 1,000W - also continuous average. The question is ... which will be louder?

In theory, both will be exactly the same - they will be capable of 120dB SPL at 1 metre with full rated power. In reality, the 100W box will be somewhere between 3 and 6dB louder than the 1kW system, because at such a low average power there will be little power compression in the loudspeaker(s)."

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