How much power to increase SPL +3db?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=22185
Printed Date: May 11, 2024 at 12:57 PM
Topic: How much power to increase SPL +3db?
Posted By: anti_rice
Subject: How much power to increase SPL +3db?
Date Posted: December 01, 2003 at 1:02 PM
Just a quick question here, how much power would i need to increase the sound pressure +3db? Just for example, say I had 100 watts going to a 12" sub and it had 130db. How much power would I need to increase this by to make it put out 133 db?
Replies:
Posted By: muppetmaster
Date Posted: December 01, 2003 at 1:10 PM
a 3 db increase is essentially doubling the input of something, whether it is light, electricity, or whatever you want to measure. I would say 200 watts
Posted By: forbidden
Date Posted: December 01, 2003 at 1:28 PM
I agree, this is a basic generalization of how to get more output, there are a lot more ways to get louder as well.
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Posted By: muppetmaster
Date Posted: December 01, 2003 at 1:32 PM
yes, another way to get 3 db more out of that, would be to add another 12" sub. Because the cone area is doubled, the acoustic sensitivity is 3 db higher than that of a single cone, and doubles the power handling ability as well. another way to get more db is to efficiently eliminate resonance in your vehicle ie. dynamat, brown bread, roofing material....
Posted By: pureRF
Date Posted: December 01, 2003 at 1:51 PM
Or you could get a new high spl sub
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Posted By: si90lude
Date Posted: December 02, 2003 at 12:08 PM
I agree with muppetmaster, as a general rule, anytime you double something (power, speakers etc) you will gain about 3db
Posted By: auex
Date Posted: December 02, 2003 at 6:25 PM
To gain 3db (theoretically, well it is proven but for mainly home audio) you would either need to double the power or double the cone area. This is not saying playing with the direction the subs face or with the gain/radio will not aslo accomlish this.
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Posted By: forbidden
Date Posted: December 02, 2003 at 6:29 PM
or retune a sub box!
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Posted By: ultimate1502
Date Posted: December 10, 2003 at 7:32 PM
auex]T wrote:
gain 3db (theoretically, well it is proven but for mainly home audio) you would either need to double the power or double the cone area. This is not saying playing with the direction the subs face or with the gain/radio will not aslo accomlish this.
You are correct grasshopper. That is the theory I have always used. ------------- ultimate electronics #1502
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