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Speaker db rating?

Does anyone knowthe ratio of a speakers db rating, 1 db at 1 meter,relitive to amplifier watts to power them well enough to be loud enough in a small room.
Example:what kind of db rating would one look for if a 8 watt amplifier was used?
How does each point,as the rating increases,affect the wattage needed to drive the speaker.
Thanks
G.H.
groundhog
rodman99999
6,206 posts
 
This site is a bit more in depth in it's presentation of the facts: (http://www.analogrules.com/dbwatts.html) The tool that Hemihorn posted takes these factors into consideration.
elevick
2,638 posts
 
For simplicity:
Assuming 92db speakers
1 watt = 92db
2 watts = 95db
4 watts = 98db and so on...

Takes double the wattage to increase 3db
Takes 10 db to have perceived doubling of volume
unsound
7,358 posts
 
Please forgive me for getting a bit off topic, but, with all due respect to JohnK; it doesn't make the case for hi-eff horns for me.
rauliruegas
13,129 posts
 
Hi: Other thing to take in count is how much power do we need for transients ?, maybe we can be safe about with an amplifier headroom of 5-6db for distortion free performance.

Regards and enjoy the music.
Raul.
rodman99999
6,206 posts
 
Groundhog- Refer to the websites cited for the facts. Also: Remember that tube amps always provide more listenable volume than their rated wattage will indicate. Happy shopping and listening.
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