The Data base of the LS:
   

graphic

All the serious manufacturers provide charts with these parameters.
MMS
mass mobile of the crew of the LS
SD
surface activates membrane of the LS
FR
frequency of resonance of the LS
QT
coefficient of total quality of the LS
QM
mechanical coefficient of quality of the LS
Rcc
resistance to the D.C. current of the reel of the LS

The base is to date made up of a file of more than 800 cards of Loudspeaker of various marks of the market.