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Help whit Speaker sensitivity/power math

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Wed, 06/19/2013 - 09:07
rogonzab
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Joined: 06/15/2013

Hi,

I am not shure about this, so correct me if I am wrong.

Acording to this:
http://www.musiccenters.com/vol.html

a +7db increase equal to (kind of)4x power.

So, if my Laney Cub10, 10w tube amp, has a 10" 94db speaker (Celestion Tube 10), and I change that speaker for a 12" 101 db one (Eminence Patriot red white blues), that is the same (in theory) as having a 40w amp?

I am not looking to turn a 10w amp into a 40w amp, I just want to increase my volume enough to hear my self on a jam, whit guitar player who use 25-30w amps.

I am in the right direction?

Thxs!!

Edit: I just found a 12" Eminence Wizard that is 103 db!! that is 9db more than my actual speaker (94 db)

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Sun, 06/23/2013 - 06:41
#1
Expert Skip Simmons
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Joined: 01/18/2010
Math class

Hello rogonzab- Wow! That's a new question! However, it has one of my typical old answers.....

Changing anything in your rig will change the sound. Notice I didn't say "improve " the sound. Speaker efficiency is just one more spice in the stew, not the entire stew. Using a more efficient speaker WILL make an amp a bit louder, but it will also increase the possibility of feedback. The worst part is that it may or may not solve your problem.

Any amp that size will need to be miked at most jams unless you are lucky enough to be jamming with some groovy, dynamic, low-volume musicians. Get your own quality low-z "vocal" mike and learn how to mike your amp into the PA. You will also be learning some real diplomacy as you deal with the person who is in charge of the PA!

Skip Simmons

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