How to find the loudest 2 inch speaker ?

[audioguru]

I am a North American guy with a normal sounding voice. My voice frequency is about 100Hz.
Some weird guys in a call center on the other side of the world phone me every day to try to sell me Duck Cleaning have a voice at 300Hz to 400Hz and sound like chipmunks.

Some of these tiny speakers claim "full range" from 170Hz on up without a graph and without saying if 170Hz is -3dB or is -30dB.
One datasheet that shows a graph has the output level dropping very steeply below 200Hz.

These tiny speakers will produce the chipmunk voice of a weird guy on the other side of the world if he is very close to you. They should also produce women's and children's voices if they are near to you.

 

[tomizett]

True, you won't get a rich reproduction without a good response to 100Hz, but for intelligibility the classic telephone band of 300Hz-3kHz is adequate.

Externet - will be interested in your findings, keep us posted.
Do you intend to build a column/line speaker, or will it be used as a single unit?

 

[audioguru]

I cannot understand speech from Chipmunks who produce no normal male vocal sounds near 100Hz. I also cannot understand speech that has no important consonant sounds that reach up to 14kHz. That is why letters must be spoken on a telephone or on a horrible narrow bandwidth radio: Charlie Foxtrot, and numbers are messed up: un, oo, ree, or, ive, ix instead of hearing 1-6.

 

[Externet]

Do you intend to build a column/line speaker, or will it be used as a single unit?

Single speaker

 

[tomizett]

So probably something with as higher power handling/largest magnet you can get, and a relatively stiff suspension for voice reproduction - probably a bit different to the kinds of drivers used in portable bluetooth speakers.