Driver efficiency vs. overall speaker efficiency


If a speaker uses a driver that has an efficiency of, let's say 87.5db/2.83V/m, then theoretically the speaker can never have an efficiency of greater than 97.5db?
andy2

Showing 2 responses by pragmatist

If you connect two drivers in an MTM configuration,the impedence will be halved,drawing twice the current, but about 6 dbs will be added. So,it is possible to wire two 88db,8 ohm speakers so that the final result is 94db sensitive into 4 ohms.
Satch:

I'm not an expert,so allow me to quote my source:

http://www.northcreekmusic.com

If you link through to the page that describes their rhythm speaker,in the fine print,it talks about an mtm set-up and its effects.(It's the paragraph labeled "Sensitivity and Impedance".)