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Max SPL of a loaded box?
Max SPL of a loaded box?
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Old 14th November 2017, 02:51 PM   #1
cpc748 is offline cpc748  United States
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Default Max SPL of a loaded box?

I have a question regarding max spl output of a speaker box. Let say I have a 2 way box frequency response from 37hz to 21Khz max output of 137dB.

Does that mean I'm able to get 137dB out of it given the correct amplifier at full range of play back 20hz to 20Khz or is the box rated at a certain frequency not full spectrum?

Last edited by cpc748; 14th November 2017 at 03:25 PM.
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Old 14th November 2017, 05:16 PM   #2
weltersys is offline weltersys  United States
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Quote:
Originally Posted by cpc748 View Post
I have a question regarding max spl output of a speaker box. Let say I have a 2 way box frequency response from 37hz to 21Khz max output of 137dB.

Does that mean I'm able to get 137dB out of it given the correct amplifier at full range of play back 20hz to 20Khz or is the box rated at a certain frequency not full spectrum?
Most manufacturers rate "Max SPL" as a peak at some frequency presumably within the pass band of the speaker within the rated power, with no power compression, that is, "cold" voice coils. The peak could be much shorter than one that would be read on a typical SPL meter.
Reducing 10 dB (or more) from the rating often gives a more "real world" rating.
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Old 23rd November 2017, 01:09 AM   #3
cpc748 is offline cpc748  United States
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Quote:
Originally Posted by weltersys View Post
Most manufacturers rate "Max SPL" as a peak at some frequency presumably within the pass band of the speaker within the rated power, with no power compression, that is, "cold" voice coils. The peak could be much shorter than one that would be read on a typical SPL meter.
Reducing 10 dB (or more) from the rating often gives a more "real world" rating.
Thank you, I kind of figured that I just needed to confirm
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Old 23rd November 2017, 08:33 AM   #4
chris661 is offline chris661  United Kingdom
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What Art said.

Here's an article I wrote out of frustration at the industry's current state:
Spec Wars: Looking Inside Loudspeaker SPL Specifications - ProSoundWeb

Chris
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